/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_two_index_05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:33:11,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:33:11,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:33:11,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:33:11,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:33:11,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:33:11,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:33:11,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:33:11,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:33:11,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:33:11,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:33:11,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:33:11,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:33:11,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:33:11,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:33:11,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:33:11,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:33:11,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:33:11,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:33:11,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:33:11,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:33:11,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:33:11,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:33:11,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:33:11,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:33:11,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:33:11,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:33:11,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:33:11,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:33:11,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:33:11,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:33:11,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:33:11,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:33:11,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:33:11,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:33:11,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:33:11,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:33:11,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:33:11,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:33:11,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:33:11,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:33:11,593 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 19:33:11,621 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:33:11,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:33:11,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:33:11,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:33:11,624 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:33:11,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:33:11,625 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:33:11,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:33:11,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:33:11,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:33:11,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:33:11,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:33:11,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:33:11,627 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:33:11,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:33:11,627 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:33:11,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:33:11,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:33:11,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:33:11,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:33:11,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:33:11,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:33:11,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:33:11,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:33:11,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:33:11,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:33:11,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:33:11,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:33:11,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:33:11,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:33:12,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:33:12,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:33:12,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:33:12,163 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:33:12,164 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:33:12,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_05.i [2020-10-26 19:33:12,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/463c06338/969ec0ad9900474d8018b74f47c2e2cc/FLAGc4f970501 [2020-10-26 19:33:12,935 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:33:12,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_05.i [2020-10-26 19:33:12,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/463c06338/969ec0ad9900474d8018b74f47c2e2cc/FLAGc4f970501 [2020-10-26 19:33:13,270 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/463c06338/969ec0ad9900474d8018b74f47c2e2cc [2020-10-26 19:33:13,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:33:13,280 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:33:13,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:33:13,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:33:13,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:33:13,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:33:13" (1/1) ... [2020-10-26 19:33:13,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d5189c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:13, skipping insertion in model container [2020-10-26 19:33:13,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:33:13" (1/1) ... [2020-10-26 19:33:13,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:33:13,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:33:13,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:33:13,497 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:33:13,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:33:13,540 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:33:13,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:13 WrapperNode [2020-10-26 19:33:13,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:33:13,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:33:13,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:33:13,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:33:13,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:13" (1/1) ... [2020-10-26 19:33:13,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:13" (1/1) ... [2020-10-26 19:33:13,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:13" (1/1) ... [2020-10-26 19:33:13,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:13" (1/1) ... [2020-10-26 19:33:13,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:13" (1/1) ... [2020-10-26 19:33:13,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:13" (1/1) ... [2020-10-26 19:33:13,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:13" (1/1) ... [2020-10-26 19:33:13,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:33:13,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:33:13,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:33:13,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:33:13,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:13" (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 19:33:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:33:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:33:13,674 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:33:13,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:33:13,674 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:33:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:33:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:33:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:33:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:33:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:33:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:33:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:33:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:33:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:33:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:33:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:33:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:33:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:33:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:33:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:33:13,942 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:33:13,942 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:33:13,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:33:13 BoogieIcfgContainer [2020-10-26 19:33:13,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:33:13,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:33:13,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:33:13,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:33:13,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:33:13" (1/3) ... [2020-10-26 19:33:13,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8ad57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:33:13, skipping insertion in model container [2020-10-26 19:33:13,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:13" (2/3) ... [2020-10-26 19:33:13,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8ad57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:33:13, skipping insertion in model container [2020-10-26 19:33:13,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:33:13" (3/3) ... [2020-10-26 19:33:13,953 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2020-10-26 19:33:13,968 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:33:13,974 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:33:14,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:33:14,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:33:14,085 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:33:14,086 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:33:14,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:33:14,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:33:14,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:33:14,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:33:14,086 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:33:14,140 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-26 19:33:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:33:14,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:14,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:14,154 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:14,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1774182118, now seen corresponding path program 1 times [2020-10-26 19:33:14,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:14,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850939140] [2020-10-26 19:33:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:14,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:14,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:14,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:14,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:33:14,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:14,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-26 19:33:14,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:14,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:14,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:14,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:33:14,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:33:14,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:14,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:14,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:14,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:14,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:14,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:33:14,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:14,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:14,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:14,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:14,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:14,829 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 19:33:14,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850939140] [2020-10-26 19:33:14,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:33:14,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:33:14,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254508922] [2020-10-26 19:33:14,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:33:14,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:14,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:33:14,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:33:14,863 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-10-26 19:33:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:14,991 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2020-10-26 19:33:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:33:14,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:33:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:15,002 INFO L225 Difference]: With dead ends: 49 [2020-10-26 19:33:15,003 INFO L226 Difference]: Without dead ends: 22 [2020-10-26 19:33:15,008 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 19:33:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-26 19:33:15,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-26 19:33:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-26 19:33:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-26 19:33:15,069 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-10-26 19:33:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:15,070 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-26 19:33:15,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:33:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-26 19:33:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:33:15,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:15,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:15,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:33:15,074 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:15,075 INFO L82 PathProgramCache]: Analyzing trace with hash -577359468, now seen corresponding path program 1 times [2020-10-26 19:33:15,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:15,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022287344] [2020-10-26 19:33:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:15,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:15,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:15,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:15,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:33:15,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:15,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-26 19:33:15,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:15,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:33:15,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:15,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:33:15,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:15,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:15,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:15,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:15,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:15,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:15,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:33:15,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:15,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:15,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:15,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:15,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:15,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022287344] [2020-10-26 19:33:15,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:15,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:33:15,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420827697] [2020-10-26 19:33:15,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:33:15,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:15,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:33:15,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:33:15,556 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-26 19:33:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:15,662 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-10-26 19:33:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:33:15,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-26 19:33:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:15,666 INFO L225 Difference]: With dead ends: 41 [2020-10-26 19:33:15,666 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 19:33:15,667 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 19:33:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 19:33:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-26 19:33:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 19:33:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-26 19:33:15,694 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-10-26 19:33:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:15,694 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-26 19:33:15,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:33:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-26 19:33:15,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 19:33:15,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:15,696 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:15,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:33:15,697 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:15,697 INFO L82 PathProgramCache]: Analyzing trace with hash -446889165, now seen corresponding path program 1 times [2020-10-26 19:33:15,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:15,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376812143] [2020-10-26 19:33:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:15,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:15,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:15,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:16,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:16,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:33:16,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:16,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-26 19:33:16,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:16,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:33:16,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:16,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:33:16,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:33:16,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:16,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:16,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:16,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:16,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:16,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:33:16,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:16,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:16,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:16,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:16,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:33:16,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376812143] [2020-10-26 19:33:16,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:16,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:33:16,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019187738] [2020-10-26 19:33:16,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:33:16,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:16,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:33:16,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:33:16,596 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-26 19:33:16,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:16,682 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-26 19:33:16,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:33:16,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-26 19:33:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:16,684 INFO L225 Difference]: With dead ends: 43 [2020-10-26 19:33:16,684 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:33:16,685 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 19:33:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:33:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-26 19:33:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:33:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-26 19:33:16,696 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2020-10-26 19:33:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:16,696 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-26 19:33:16,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:33:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-26 19:33:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:33:16,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:16,697 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:16,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:33:16,698 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:16,698 INFO L82 PathProgramCache]: Analyzing trace with hash 505618241, now seen corresponding path program 2 times [2020-10-26 19:33:16,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:16,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852123498] [2020-10-26 19:33:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:16,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:16,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:16,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:17,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:17,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:33:17,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:17,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 934 [2020-10-26 19:33:17,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:17,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:33:17,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:17,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:33:17,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:33:17,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:17,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:17,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:17,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:17,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:17,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:33:17,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:17,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:17,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:17,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:17,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:33:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:17,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852123498] [2020-10-26 19:33:17,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:17,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:33:17,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478403013] [2020-10-26 19:33:17,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:33:17,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:17,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:33:17,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:33:17,887 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2020-10-26 19:33:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:18,223 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-26 19:33:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:18,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-26 19:33:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:18,225 INFO L225 Difference]: With dead ends: 41 [2020-10-26 19:33:18,225 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:33:18,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:33:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-26 19:33:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:33:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-26 19:33:18,236 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 21 [2020-10-26 19:33:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:18,236 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-26 19:33:18,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:33:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-26 19:33:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:33:18,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:18,238 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:18,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:33:18,238 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:18,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1957781260, now seen corresponding path program 3 times [2020-10-26 19:33:18,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:18,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115060784] [2020-10-26 19:33:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:18,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:18,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:18,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:19,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:19,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:33:19,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:19,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1216 [2020-10-26 19:33:19,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:33:19,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:19,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:33:19,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:19,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:19,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:19,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:19,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:19,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:19,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:33:19,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:19,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:19,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:19,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:19,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:19,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115060784] [2020-10-26 19:33:19,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:19,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:33:19,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869107505] [2020-10-26 19:33:19,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:33:19,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:19,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:33:19,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:33:19,769 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-10-26 19:33:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:20,144 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-26 19:33:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:20,145 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-26 19:33:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:20,148 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:33:20,148 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:33:20,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:33:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-10-26 19:33:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:33:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:33:20,159 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2020-10-26 19:33:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:20,160 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:33:20,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:33:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:33:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:33:20,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:20,161 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:20,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:33:20,161 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1013754463, now seen corresponding path program 4 times [2020-10-26 19:33:20,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:20,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216655089] [2020-10-26 19:33:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:20,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:20,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:20,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:21,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:21,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:33:21,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:21,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1343 [2020-10-26 19:33:21,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:21,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:33:21,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:21,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:33:21,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:21,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:21,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:21,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:21,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:21,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:21,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:21,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:21,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:21,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:21,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:21,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:21,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216655089] [2020-10-26 19:33:21,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:21,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:33:21,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688211582] [2020-10-26 19:33:21,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:33:21,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:21,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:33:21,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:33:21,589 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2020-10-26 19:33:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:21,681 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-26 19:33:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:33:21,682 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-26 19:33:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:21,683 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:33:21,683 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:33:21,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:33:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:33:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-26 19:33:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:33:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-26 19:33:21,693 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 23 [2020-10-26 19:33:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:21,693 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-26 19:33:21,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:33:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-26 19:33:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:33:21,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:21,694 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:21,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:33:21,695 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:21,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1714546989, now seen corresponding path program 5 times [2020-10-26 19:33:21,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:21,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413954415] [2020-10-26 19:33:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:21,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:21,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:21,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:23,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:23,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:33:23,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:23,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1379 [2020-10-26 19:33:23,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:33:23,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:23,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:23,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:23,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:23,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:23,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:23,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:23,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:23,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:23,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:23,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:23,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413954415] [2020-10-26 19:33:23,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:23,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:33:23,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773423630] [2020-10-26 19:33:23,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:33:23,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:23,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:33:23,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:33:23,169 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 8 states. [2020-10-26 19:33:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:23,250 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-26 19:33:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:33:23,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-26 19:33:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:23,252 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:33:23,252 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:33:23,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:33:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:33:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-26 19:33:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:33:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-26 19:33:23,261 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-10-26 19:33:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:23,262 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-26 19:33:23,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:33:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-26 19:33:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:33:23,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:23,263 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:23,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:33:23,263 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:23,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1964278815, now seen corresponding path program 6 times [2020-10-26 19:33:23,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:23,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293965405] [2020-10-26 19:33:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:23,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:23,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:23,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:25,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:25,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:33:25,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:25,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1804 [2020-10-26 19:33:25,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:25,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:33:25,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:25,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:33:25,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:25,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:25,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:25,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:25,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:25,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:25,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:25,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:25,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:33:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:25,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293965405] [2020-10-26 19:33:25,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:25,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:33:25,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310895739] [2020-10-26 19:33:25,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:33:25,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:25,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:33:25,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:33:25,184 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-26 19:33:25,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:25,318 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-26 19:33:25,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:33:25,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-26 19:33:25,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:25,320 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:33:25,320 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:33:25,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:33:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:33:25,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-26 19:33:25,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:33:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-26 19:33:25,329 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 25 [2020-10-26 19:33:25,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:25,329 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-26 19:33:25,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:33:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-26 19:33:25,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:33:25,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:25,330 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:25,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:33:25,331 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:25,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1116030829, now seen corresponding path program 7 times [2020-10-26 19:33:25,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:25,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925593903] [2020-10-26 19:33:25,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:25,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:25,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:25,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:27,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:27,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:33:27,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:27,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2473 [2020-10-26 19:33:27,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:27,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:33:27,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:27,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:33:27,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:28,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:28,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:28,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:28,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:28,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:28,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:33:28,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:28,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:33:28,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925593903] [2020-10-26 19:33:28,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:28,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:33:28,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575806261] [2020-10-26 19:33:28,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:33:28,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:28,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:33:28,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:28,055 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 12 states. [2020-10-26 19:33:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:28,427 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-26 19:33:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:28,428 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-26 19:33:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:28,429 INFO L225 Difference]: With dead ends: 48 [2020-10-26 19:33:28,430 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:33:28,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:33:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:33:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-10-26 19:33:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:33:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-26 19:33:28,449 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-10-26 19:33:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:28,449 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-26 19:33:28,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:33:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-26 19:33:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:33:28,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:28,453 INFO L422 BasicCegarLoop]: trace histogram [6, 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 19:33:28,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:33:28,454 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:28,454 INFO L82 PathProgramCache]: Analyzing trace with hash -248242047, now seen corresponding path program 1 times [2020-10-26 19:33:28,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:28,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945984568] [2020-10-26 19:33:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:28,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:28,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:29,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:33:29,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:29,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-26 19:33:29,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:29,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:33:29,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:29,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:33:29,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:29,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:29,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:29,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:29,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:29,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:29,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:29,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:29,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:29,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:29,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:29,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 19:33:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:29,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:29,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:29,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:29,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:29,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:29,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:29,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:29,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:29,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:33:29,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945984568] [2020-10-26 19:33:29,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:29,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:33:29,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067140229] [2020-10-26 19:33:29,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:33:29,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:29,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:33:29,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:33:29,166 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 10 states. [2020-10-26 19:33:29,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:29,277 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-10-26 19:33:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:33:29,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-26 19:33:29,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:29,278 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:33:29,278 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:33:29,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:33:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:33:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-26 19:33:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:33:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-26 19:33:29,287 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-26 19:33:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:29,287 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-26 19:33:29,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:33:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-26 19:33:29,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:33:29,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:29,288 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:29,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:33:29,289 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:29,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:29,289 INFO L82 PathProgramCache]: Analyzing trace with hash 100505504, now seen corresponding path program 2 times [2020-10-26 19:33:29,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:29,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123074499] [2020-10-26 19:33:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:29,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:31,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:31,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:33:31,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:31,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2402 [2020-10-26 19:33:31,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:31,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:33:31,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:31,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:33:31,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:31,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:31,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:31,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:31,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:31,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:31,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:33:31,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:31,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:31,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:31,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:31,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:31,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-26 19:33:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:31,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:31,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:31,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:31,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:31,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 19:33:31,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:31,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:31,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-26 19:33:31,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123074499] [2020-10-26 19:33:31,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:31,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:33:31,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306382130] [2020-10-26 19:33:31,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:33:31,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:31,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:33:31,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:31,960 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2020-10-26 19:33:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:32,250 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-10-26 19:33:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:33:32,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-26 19:33:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:32,252 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:33:32,252 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:33:32,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:33:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:33:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-26 19:33:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:33:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-26 19:33:32,262 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 33 [2020-10-26 19:33:32,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:32,265 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-26 19:33:32,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:33:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-26 19:33:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:33:32,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:32,269 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:32,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:33:32,269 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:32,270 INFO L82 PathProgramCache]: Analyzing trace with hash -356741805, now seen corresponding path program 3 times [2020-10-26 19:33:32,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:32,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300101059] [2020-10-26 19:33:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:32,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:32,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:32,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:33:35,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:35,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3109 [2020-10-26 19:33:35,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:33:35,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:35,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:33:35,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:35,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:35,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:35,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:35,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:35,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:35,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:35,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:35,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:35,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:33:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:35,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:35,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:35,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:35,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:35,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:35,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:35,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:35,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300101059] [2020-10-26 19:33:35,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:35,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:33:35,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660009310] [2020-10-26 19:33:35,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:33:35,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:35,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:33:35,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:33:35,517 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 11 states. [2020-10-26 19:33:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:35,615 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2020-10-26 19:33:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:35,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-26 19:33:35,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:35,616 INFO L225 Difference]: With dead ends: 85 [2020-10-26 19:33:35,616 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:33:35,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:33:35,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:33:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-10-26 19:33:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:33:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-26 19:33:35,632 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 34 [2020-10-26 19:33:35,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:35,633 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-26 19:33:35,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:33:35,634 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-26 19:33:35,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:33:35,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:35,638 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:35,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:33:35,638 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:35,639 INFO L82 PathProgramCache]: Analyzing trace with hash 983660769, now seen corresponding path program 4 times [2020-10-26 19:33:35,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:35,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745478273] [2020-10-26 19:33:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:35,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:36,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:38,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:38,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:33:38,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:38,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3132 [2020-10-26 19:33:38,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:33:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:33:38,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:38,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:38,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:38,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:38,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:38,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:38,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:38,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:38,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:38,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:38,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:38,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:38,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 19:33:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:38,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:38,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:38,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:38,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:38,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:38,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:38,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:38,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:38,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:38,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:38,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745478273] [2020-10-26 19:33:38,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:38,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:33:38,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373684567] [2020-10-26 19:33:38,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:33:38,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:33:38,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:38,915 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 12 states. [2020-10-26 19:33:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:39,063 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-10-26 19:33:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:33:39,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-26 19:33:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:39,064 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:33:39,065 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:33:39,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:33:39,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-26 19:33:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:33:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-26 19:33:39,075 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 35 [2020-10-26 19:33:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:39,075 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-26 19:33:39,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:33:39,075 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-26 19:33:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:33:39,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:39,076 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:39,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:33:39,076 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:39,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:39,077 INFO L82 PathProgramCache]: Analyzing trace with hash -413532397, now seen corresponding path program 5 times [2020-10-26 19:33:39,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:39,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783646681] [2020-10-26 19:33:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:39,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:39,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:39,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:42,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:33:42,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:42,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3407 [2020-10-26 19:33:42,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:33:42,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:42,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:33:42,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:42,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:42,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:42,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:42,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:42,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:42,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:42,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:42,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:42,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:42,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:42,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:33:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:42,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:42,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:42,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:42,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:42,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:42,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:42,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783646681] [2020-10-26 19:33:42,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:42,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:33:42,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877815562] [2020-10-26 19:33:42,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:33:42,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:42,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:33:42,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:33:42,647 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 13 states. [2020-10-26 19:33:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:42,777 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-10-26 19:33:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:33:42,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-26 19:33:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:42,779 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:33:42,779 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:33:42,779 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 19:33:42,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:33:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-26 19:33:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:33:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 19:33:42,789 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 36 [2020-10-26 19:33:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:42,789 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 19:33:42,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:33:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 19:33:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:33:42,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:42,790 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:42,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:33:42,791 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:42,791 INFO L82 PathProgramCache]: Analyzing trace with hash -776847583, now seen corresponding path program 6 times [2020-10-26 19:33:42,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:42,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111282568] [2020-10-26 19:33:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:42,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:43,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:46,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:46,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:33:46,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:46,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3436 [2020-10-26 19:33:46,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:46,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:33:46,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:46,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:33:46,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:46,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:46,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:46,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:46,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:46,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:33:46,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:46,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:46,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-26 19:33:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:46,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:46,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:46,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:46,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:46,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:46,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:46,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:46,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:46,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:46,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:46,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111282568] [2020-10-26 19:33:46,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:46,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:33:46,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311102899] [2020-10-26 19:33:46,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:33:46,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:46,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:33:46,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:33:46,405 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 14 states. [2020-10-26 19:33:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:46,541 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-10-26 19:33:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:33:46,542 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-26 19:33:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:46,542 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:33:46,542 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:33:46,543 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 19:33:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:33:46,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-26 19:33:46,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:33:46,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-26 19:33:46,554 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 37 [2020-10-26 19:33:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:46,555 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-26 19:33:46,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:33:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-26 19:33:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:33:46,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:46,556 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:46,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:33:46,557 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash 845283539, now seen corresponding path program 7 times [2020-10-26 19:33:46,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:46,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342444541] [2020-10-26 19:33:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:46,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:46,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:47,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:49,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:49,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:33:49,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:49,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3257 [2020-10-26 19:33:49,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:49,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:33:49,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:49,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:33:49,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:49,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:49,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:49,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:49,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:49,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:49,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:49,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:49,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:49,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:49,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:33:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:49,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:49,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:49,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:49,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:49,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:49,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:49,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:50,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342444541] [2020-10-26 19:33:50,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:50,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:33:50,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018570311] [2020-10-26 19:33:50,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:33:50,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:50,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:33:50,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:50,005 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 15 states. [2020-10-26 19:33:50,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:50,228 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-10-26 19:33:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:33:50,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-26 19:33:50,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:50,229 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:33:50,230 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 19:33:50,233 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 19:33:50,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 19:33:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2020-10-26 19:33:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:33:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-26 19:33:50,251 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2020-10-26 19:33:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:50,251 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-26 19:33:50,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:33:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-26 19:33:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:33:50,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:50,252 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:50,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:33:50,253 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash -408259231, now seen corresponding path program 8 times [2020-10-26 19:33:50,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:50,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80497826] [2020-10-26 19:33:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:50,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:50,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:50,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:53,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:53,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:33:53,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:53,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3592 [2020-10-26 19:33:53,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:53,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:33:53,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:53,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:33:53,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:54,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:54,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:54,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:54,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:54,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:54,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:54,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:54,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:54,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:33:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:54,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:54,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:54,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:54,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:54,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-26 19:33:54,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80497826] [2020-10-26 19:33:54,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:54,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:33:54,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393777193] [2020-10-26 19:33:54,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:33:54,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:54,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:33:54,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:33:54,092 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 13 states. [2020-10-26 19:33:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:54,433 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-26 19:33:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:33:54,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-26 19:33:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:54,434 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:33:54,435 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:33:54,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:33:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:33:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-26 19:33:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:33:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-26 19:33:54,455 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 39 [2020-10-26 19:33:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:54,455 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-26 19:33:54,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:33:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-26 19:33:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:33:54,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:54,456 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:54,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:33:54,456 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:54,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:54,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1051420594, now seen corresponding path program 9 times [2020-10-26 19:33:54,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:54,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587621596] [2020-10-26 19:33:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:54,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:54,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:54,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:58,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:58,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:33:58,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:58,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4217 [2020-10-26 19:33:58,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:33:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:33:58,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:58,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:58,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:58,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:58,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:58,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:58,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:58,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:58,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:58,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:33:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:58,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:58,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:58,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:58,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:58,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:58,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:58,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:58,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:58,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:58,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:33:58,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587621596] [2020-10-26 19:33:58,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:58,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:33:58,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568313211] [2020-10-26 19:33:58,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:33:58,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:58,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:33:58,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:33:58,885 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2020-10-26 19:33:59,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:59,085 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-10-26 19:33:59,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:33:59,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-26 19:33:59,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:59,095 INFO L225 Difference]: With dead ends: 95 [2020-10-26 19:33:59,095 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:33:59,096 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 19:33:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:33:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-10-26 19:33:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:33:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-26 19:33:59,106 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 40 [2020-10-26 19:33:59,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:59,106 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-26 19:33:59,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:33:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-26 19:33:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:33:59,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:59,107 INFO L422 BasicCegarLoop]: trace histogram [13, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:59,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:33:59,107 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:59,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1012338496, now seen corresponding path program 10 times [2020-10-26 19:33:59,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:59,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525114435] [2020-10-26 19:33:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:59,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:59,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:59,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:02,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:02,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:34:02,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:02,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3696 [2020-10-26 19:34:02,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:34:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:34:02,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:03,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:03,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:03,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:03,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:03,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:03,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:34:03,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:03,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:03,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:03,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:03,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:03,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:34:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:03,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:03,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:03,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:03,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:03,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:03,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:03,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:03,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:03,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:03,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:34:03,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525114435] [2020-10-26 19:34:03,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:03,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:34:03,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144124475] [2020-10-26 19:34:03,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:34:03,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:34:03,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:34:03,041 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 17 states. [2020-10-26 19:34:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:03,185 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2020-10-26 19:34:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:34:03,185 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-26 19:34:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:03,186 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:34:03,186 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:34:03,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:34:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:34:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-26 19:34:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:34:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-26 19:34:03,206 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 41 [2020-10-26 19:34:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:03,206 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-26 19:34:03,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:34:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-26 19:34:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:34:03,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:03,207 INFO L422 BasicCegarLoop]: trace histogram [14, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:03,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:34:03,207 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:03,208 INFO L82 PathProgramCache]: Analyzing trace with hash -564360846, now seen corresponding path program 11 times [2020-10-26 19:34:03,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:03,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926452448] [2020-10-26 19:34:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:03,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:03,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:03,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:08,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:08,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:34:08,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:08,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:34:08,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:34:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:34:08,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:08,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:08,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:08,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:08,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:08,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:08,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:08,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:08,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:08,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:08,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:08,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:08,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:34:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:08,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:08,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:08,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:08,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:08,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:08,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:08,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:34:08,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926452448] [2020-10-26 19:34:08,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:08,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:34:08,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939590248] [2020-10-26 19:34:08,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:34:08,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:08,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:34:08,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:34:08,487 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 14 states. [2020-10-26 19:34:08,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:08,916 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-10-26 19:34:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:34:08,918 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-26 19:34:08,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:08,919 INFO L225 Difference]: With dead ends: 67 [2020-10-26 19:34:08,919 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:34:08,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:34:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:34:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-26 19:34:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:34:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-26 19:34:08,940 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 42 [2020-10-26 19:34:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:08,940 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-26 19:34:08,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:34:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-26 19:34:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:34:08,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:08,942 INFO L422 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:08,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:34:08,942 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:08,943 INFO L82 PathProgramCache]: Analyzing trace with hash 233558995, now seen corresponding path program 12 times [2020-10-26 19:34:08,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:08,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534173508] [2020-10-26 19:34:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:08,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:09,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:12,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:12,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:34:12,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:12,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3313 [2020-10-26 19:34:12,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:12,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:34:12,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:34:12,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:12,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:12,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:12,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:12,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:12,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:12,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:34:12,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:12,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:12,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:12,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:12,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:12,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:34:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:12,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:12,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:12,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:12,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:12,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:12,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:12,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:12,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:12,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:12,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:12,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:34:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:12,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:12,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:12,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:12,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:12,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:12,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:12,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:12,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:12,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:12,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 19:34:12,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534173508] [2020-10-26 19:34:12,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:12,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:34:12,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216608336] [2020-10-26 19:34:12,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:34:12,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:12,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:34:12,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:34:12,516 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 18 states. [2020-10-26 19:34:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:12,789 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2020-10-26 19:34:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:34:12,790 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-10-26 19:34:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:12,793 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:34:12,794 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:34:12,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:34:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:34:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-26 19:34:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:34:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-26 19:34:12,811 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 48 [2020-10-26 19:34:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:12,811 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-26 19:34:12,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:34:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-26 19:34:12,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:34:12,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:12,812 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:12,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:34:12,813 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:12,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:12,813 INFO L82 PathProgramCache]: Analyzing trace with hash 17723105, now seen corresponding path program 13 times [2020-10-26 19:34:12,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:12,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635253580] [2020-10-26 19:34:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:12,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:12,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:14,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:16,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:16,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:34:16,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:16,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3727 [2020-10-26 19:34:16,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:16,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:34:16,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:16,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 19:34:16,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:16,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:16,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:16,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:16,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:16,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:16,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:34:16,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:16,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:16,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:16,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:16,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:16,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:34:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:16,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:16,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:16,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:16,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:16,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:16,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:16,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:16,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:34:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:16,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:16,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:16,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:16,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:16,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:16,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:16,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:16,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:16,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:16,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-10-26 19:34:16,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635253580] [2020-10-26 19:34:16,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:16,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:34:16,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116882780] [2020-10-26 19:34:16,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:34:16,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:16,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:34:16,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:34:16,810 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 14 states. [2020-10-26 19:34:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:17,157 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-10-26 19:34:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:34:17,161 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-26 19:34:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:17,162 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:34:17,162 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:34:17,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:34:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:34:17,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-10-26 19:34:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:34:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-26 19:34:17,188 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-10-26 19:34:17,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:17,188 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-26 19:34:17,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:34:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-26 19:34:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:34:17,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:17,189 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:17,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:34:17,190 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:17,191 INFO L82 PathProgramCache]: Analyzing trace with hash -933285996, now seen corresponding path program 14 times [2020-10-26 19:34:17,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:17,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886183887] [2020-10-26 19:34:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:17,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:17,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:18,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:21,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:21,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:34:21,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:21,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4170 [2020-10-26 19:34:21,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:21,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:34:21,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:21,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:34:21,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:21,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:21,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:21,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:21,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:21,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:21,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:21,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:21,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:21,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:21,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:21,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:21,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:34:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:21,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:21,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:21,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:21,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:21,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:21,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:21,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:21,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:34:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:21,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:21,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:21,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:21,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:21,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:21,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:21,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:34:21,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886183887] [2020-10-26 19:34:21,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:21,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:34:21,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484192480] [2020-10-26 19:34:21,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:34:21,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:21,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:34:21,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:34:21,616 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 19 states. [2020-10-26 19:34:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:21,902 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2020-10-26 19:34:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:34:21,905 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-10-26 19:34:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:21,907 INFO L225 Difference]: With dead ends: 115 [2020-10-26 19:34:21,907 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:34:21,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:34:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:34:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-26 19:34:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:34:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-26 19:34:21,940 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 50 [2020-10-26 19:34:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:21,940 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-26 19:34:21,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:34:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-26 19:34:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:34:21,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:21,941 INFO L422 BasicCegarLoop]: trace histogram [16, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:21,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:34:21,941 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2101821218, now seen corresponding path program 15 times [2020-10-26 19:34:21,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:21,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788951929] [2020-10-26 19:34:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:21,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:22,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:24,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:34:26,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:26,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4694 [2020-10-26 19:34:26,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:34:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 19:34:26,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:26,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:26,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:26,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:26,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:34:26,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:26,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:26,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:26,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:34:26,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:34:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:26,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:26,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:26,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:34:26,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:26,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:26,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:26,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:26,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:34:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:26,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:26,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:26,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:34:26,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:26,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:26,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:26,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-26 19:34:26,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788951929] [2020-10-26 19:34:26,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:26,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:34:26,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166140765] [2020-10-26 19:34:26,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:34:26,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:26,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:34:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:34:26,976 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 15 states. [2020-10-26 19:34:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:27,556 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2020-10-26 19:34:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:34:27,557 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-26 19:34:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:27,558 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:34:27,558 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:34:27,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:34:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:34:27,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2020-10-26 19:34:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:34:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-10-26 19:34:27,572 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 51 [2020-10-26 19:34:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:27,573 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-10-26 19:34:27,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:34:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-10-26 19:34:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:34:27,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:27,574 INFO L422 BasicCegarLoop]: trace histogram [16, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:27,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:34:27,576 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:27,576 INFO L82 PathProgramCache]: Analyzing trace with hash -750753933, now seen corresponding path program 16 times [2020-10-26 19:34:27,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:27,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448434449] [2020-10-26 19:34:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:27,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:27,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:29,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:34:32,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:32,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:34:32,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:34:32,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:32,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:34:32,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:32,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:32,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:32,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:32,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:32,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:32,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:34:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:32,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:32,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:32,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:32,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:32,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:32,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:34:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:32,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:32,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:32,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:32,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:32,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:32,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:34:32,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448434449] [2020-10-26 19:34:32,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:32,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:34:32,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280783712] [2020-10-26 19:34:32,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:34:32,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:34:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:34:32,851 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 20 states. [2020-10-26 19:34:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:33,079 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-10-26 19:34:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:34:33,080 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-26 19:34:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:33,081 INFO L225 Difference]: With dead ends: 121 [2020-10-26 19:34:33,081 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:34:33,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 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 19:34:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:34:33,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2020-10-26 19:34:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:34:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-10-26 19:34:33,094 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 52 [2020-10-26 19:34:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:33,094 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-10-26 19:34:33,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:34:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-10-26 19:34:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:34:33,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:33,095 INFO L422 BasicCegarLoop]: trace histogram [17, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:33,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:34:33,096 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:33,096 INFO L82 PathProgramCache]: Analyzing trace with hash -295515263, now seen corresponding path program 17 times [2020-10-26 19:34:33,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:33,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973844245] [2020-10-26 19:34:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:33,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:33,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:35,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:38,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:34:38,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:38,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:34:38,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:38,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:34:38,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:38,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:34:38,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:38,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:38,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:38,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:38,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:38,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:38,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:38,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:38,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:38,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:38,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:38,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:34:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:38,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:38,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:38,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:38,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:38,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:38,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:38,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:34:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:38,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:38,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:38,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:38,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:38,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:38,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:34:38,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973844245] [2020-10-26 19:34:38,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:38,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:34:38,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874285984] [2020-10-26 19:34:38,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:34:38,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:34:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:34:38,419 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 21 states. [2020-10-26 19:34:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:38,620 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2020-10-26 19:34:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:34:38,620 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-26 19:34:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:38,621 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:34:38,621 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:34:38,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 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 19:34:38,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:34:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2020-10-26 19:34:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:34:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2020-10-26 19:34:38,636 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 53 [2020-10-26 19:34:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:38,637 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2020-10-26 19:34:38,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:34:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2020-10-26 19:34:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:34:38,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:38,638 INFO L422 BasicCegarLoop]: trace histogram [18, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:38,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:34:38,638 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:38,639 INFO L82 PathProgramCache]: Analyzing trace with hash 931981619, now seen corresponding path program 18 times [2020-10-26 19:34:38,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:38,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489429142] [2020-10-26 19:34:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:41,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:43,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:43,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:34:43,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:43,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:34:43,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:34:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:34:43,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:43,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:43,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:43,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:43,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:43,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:43,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:43,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:43,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:43,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:43,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:43,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:43,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:34:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:43,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:43,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:43,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:43,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:43,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:43,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:43,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:43,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:43,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:43,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:43,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:34:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:43,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:43,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:43,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:43,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:43,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:43,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:43,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-26 19:34:43,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489429142] [2020-10-26 19:34:43,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:43,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:34:43,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114304786] [2020-10-26 19:34:43,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:34:43,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:43,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:34:43,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:34:43,949 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 16 states. [2020-10-26 19:34:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:44,541 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-10-26 19:34:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:34:44,546 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-26 19:34:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:44,547 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:34:44,547 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:34:44,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:34:44,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:34:44,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-26 19:34:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:34:44,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-26 19:34:44,557 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 54 [2020-10-26 19:34:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:44,558 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-26 19:34:44,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:34:44,558 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-26 19:34:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:34:44,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:44,558 INFO L422 BasicCegarLoop]: trace histogram [18, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:44,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:34:44,559 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:44,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1214324466, now seen corresponding path program 19 times [2020-10-26 19:34:44,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:44,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705693983] [2020-10-26 19:34:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:44,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:44,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:46,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:49,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:34:49,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:49,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:34:49,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:49,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:34:49,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:49,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:34:49,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:49,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:49,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:49,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:49,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:49,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:49,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:49,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:49,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:34:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:49,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:49,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:49,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:49,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:49,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:49,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:49,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:34:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:49,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:49,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:49,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:49,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:49,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:49,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:49,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:49,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:49,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:49,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:34:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:49,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:49,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:49,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:49,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:49,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:49,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:49,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:49,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 6 proven. 171 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-26 19:34:49,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705693983] [2020-10-26 19:34:49,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:49,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:34:49,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525843723] [2020-10-26 19:34:49,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:34:49,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:49,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:34:49,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:34:49,914 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 22 states. [2020-10-26 19:34:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:50,187 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2020-10-26 19:34:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:34:50,188 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-26 19:34:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:50,188 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:34:50,189 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:34:50,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:34:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:34:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-26 19:34:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:34:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-26 19:34:50,203 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-10-26 19:34:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:50,203 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-26 19:34:50,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:34:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-26 19:34:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:34:50,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:50,204 INFO L422 BasicCegarLoop]: trace histogram [19, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:50,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:34:50,204 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash -123890432, now seen corresponding path program 20 times [2020-10-26 19:34:50,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:50,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258759786] [2020-10-26 19:34:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:50,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:50,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:52,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:55,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:34:55,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:55,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:34:55,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:34:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 19:34:55,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:55,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:55,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:55,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:55,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:55,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:34:55,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:55,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:55,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:55,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:55,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:55,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:34:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:55,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:55,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:55,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:55,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:55,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:55,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:55,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:55,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:55,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:34:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:55,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:55,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:55,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:55,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:55,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:55,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:55,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:34:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:55,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:55,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:55,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:55,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:55,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:55,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:55,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:55,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:55,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-10-26 19:34:55,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258759786] [2020-10-26 19:34:55,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:55,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:34:55,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630092003] [2020-10-26 19:34:55,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:34:55,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:55,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:34:55,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:34:55,506 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 16 states. [2020-10-26 19:34:55,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:55,971 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2020-10-26 19:34:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:34:55,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-26 19:34:55,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:55,973 INFO L225 Difference]: With dead ends: 89 [2020-10-26 19:34:55,973 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:34:55,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:34:55,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:34:55,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-10-26 19:34:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:34:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-26 19:34:55,996 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 61 [2020-10-26 19:34:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:55,997 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-26 19:34:55,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:34:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-26 19:34:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:34:55,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:55,999 INFO L422 BasicCegarLoop]: trace histogram [19, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:55,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:34:55,999 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:55,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:55,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2142914995, now seen corresponding path program 21 times [2020-10-26 19:34:56,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:56,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996844291] [2020-10-26 19:34:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:56,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:56,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:59,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:01,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:35:01,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:01,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:35:01,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:35:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:35:01,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:01,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:01,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:01,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:01,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:01,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:01,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:35:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:01,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:01,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:01,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:01,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:35:01,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:01,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:01,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:01,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:01,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:01,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:35:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:01,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:01,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:01,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:01,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:01,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:01,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:01,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:35:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:01,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:01,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:01,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:01,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:35:01,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:01,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:01,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:01,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:01,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-10-26 19:35:01,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996844291] [2020-10-26 19:35:01,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:01,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:35:01,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861697235] [2020-10-26 19:35:01,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:35:01,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:01,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:35:01,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:35:01,404 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 17 states. [2020-10-26 19:35:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:02,147 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2020-10-26 19:35:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:35:02,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-10-26 19:35:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:02,148 INFO L225 Difference]: With dead ends: 109 [2020-10-26 19:35:02,148 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:35:02,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:35:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:35:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 82. [2020-10-26 19:35:02,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:35:02,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2020-10-26 19:35:02,162 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 62 [2020-10-26 19:35:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:02,162 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2020-10-26 19:35:02,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:35:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2020-10-26 19:35:02,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:35:02,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:02,163 INFO L422 BasicCegarLoop]: trace histogram [19, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:02,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:35:02,164 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:02,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:02,164 INFO L82 PathProgramCache]: Analyzing trace with hash -600560800, now seen corresponding path program 22 times [2020-10-26 19:35:02,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:02,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293175613] [2020-10-26 19:35:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:02,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:05,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:07,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:35:07,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:07,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:35:07,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:35:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-26 19:35:07,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:07,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:07,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:07,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:07,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:07,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:07,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:07,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:07,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:07,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:07,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:35:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:07,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:07,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:07,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:07,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:07,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:07,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:07,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:07,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:07,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:07,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:35:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:07,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:07,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:07,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:07,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:07,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:07,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:07,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:07,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:35:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:07,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:07,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:07,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:07,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:07,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:07,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:07,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:07,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:07,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-10-26 19:35:07,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293175613] [2020-10-26 19:35:07,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:07,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:35:07,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440893111] [2020-10-26 19:35:07,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:35:07,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:07,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:35:07,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:35:07,598 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 18 states. [2020-10-26 19:35:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:08,336 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-10-26 19:35:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:35:08,337 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2020-10-26 19:35:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:08,338 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:35:08,338 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:35:08,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:35:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:35:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2020-10-26 19:35:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:35:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-26 19:35:08,349 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2020-10-26 19:35:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:08,349 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-26 19:35:08,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:35:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-26 19:35:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:35:08,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:08,350 INFO L422 BasicCegarLoop]: trace histogram [19, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:08,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:35:08,350 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:08,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:08,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1381899884, now seen corresponding path program 23 times [2020-10-26 19:35:08,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:08,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306435646] [2020-10-26 19:35:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:08,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:08,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:35:13,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4836 [2020-10-26 19:35:13,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:35:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:35:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:13,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:13,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:13,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:13,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:13,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:13,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:35:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:13,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:13,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:13,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:13,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:13,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:13,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:35:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:13,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:13,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:13,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:13,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:13,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:13,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:35:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:13,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:13,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:13,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:13,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:13,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:13,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:35:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:13,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:13,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:13,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:13,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:13,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:13,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-26 19:35:13,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306435646] [2020-10-26 19:35:13,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:13,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:35:13,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005385003] [2020-10-26 19:35:13,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:35:13,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:13,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:35:13,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:35:13,535 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 23 states. [2020-10-26 19:35:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:13,733 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-10-26 19:35:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:35:13,734 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 68 [2020-10-26 19:35:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:13,735 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:35:13,735 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:35:13,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:35:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:35:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-26 19:35:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:35:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-26 19:35:13,745 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-10-26 19:35:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:13,745 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-26 19:35:13,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:35:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-26 19:35:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:35:13,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:13,746 INFO L422 BasicCegarLoop]: trace histogram [20, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:13,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:35:13,746 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash 147220898, now seen corresponding path program 24 times [2020-10-26 19:35:13,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:13,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022760634] [2020-10-26 19:35:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:18,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:18,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:35:18,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:18,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4860 [2020-10-26 19:35:18,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:18,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:35:18,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:35:18,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:18,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:18,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:18,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:18,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:18,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:18,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:18,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:18,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:18,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:18,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:18,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:18,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:35:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:18,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:18,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:18,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:18,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:18,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:18,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:18,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:18,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:18,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:18,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:18,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:35:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:18,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:18,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:18,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:18,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:18,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:18,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:18,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:35:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:18,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:18,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:18,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:18,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:18,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:18,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:18,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:18,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:18,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:18,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:18,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:35:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:18,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:18,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:18,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:18,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:18,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:18,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:18,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 8 proven. 210 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-26 19:35:18,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022760634] [2020-10-26 19:35:18,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:18,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:35:18,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929108383] [2020-10-26 19:35:18,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:35:18,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:18,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:35:18,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:35:18,972 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 24 states. [2020-10-26 19:35:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:19,251 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2020-10-26 19:35:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:35:19,251 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-26 19:35:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:19,252 INFO L225 Difference]: With dead ends: 119 [2020-10-26 19:35:19,253 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:35:19,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 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 19:35:19,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:35:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:35:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:35:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-26 19:35:19,264 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2020-10-26 19:35:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:19,264 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-26 19:35:19,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:35:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-26 19:35:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:35:19,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:19,265 INFO L422 BasicCegarLoop]: trace histogram [21, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:19,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:35:19,266 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:19,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:19,266 INFO L82 PathProgramCache]: Analyzing trace with hash 305324884, now seen corresponding path program 25 times [2020-10-26 19:35:19,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:19,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329340304] [2020-10-26 19:35:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:19,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:24,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:35:24,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:24,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:35:24,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:24,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:35:24,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:24,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:35:24,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:24,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:24,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:24,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:24,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:24,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:24,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:24,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:24,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:24,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:24,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:24,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:35:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:24,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:24,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:24,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:24,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:24,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:24,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:24,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:35:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:24,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:24,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:24,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:24,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:24,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:24,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:24,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:24,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:24,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:24,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:35:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:24,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:24,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:24,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:24,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:24,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:24,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:24,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:35:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:24,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:24,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:24,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:24,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:24,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:24,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:24,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:24,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:24,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 8 proven. 231 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-26 19:35:24,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329340304] [2020-10-26 19:35:24,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:24,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:35:24,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231039473] [2020-10-26 19:35:24,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:35:24,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:24,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:35:24,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:35:24,670 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 25 states. [2020-10-26 19:35:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:24,875 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-10-26 19:35:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:35:24,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2020-10-26 19:35:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:24,877 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:35:24,877 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:35:24,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:35:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:35:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-10-26 19:35:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:35:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-26 19:35:24,889 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 70 [2020-10-26 19:35:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:24,889 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-26 19:35:24,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:35:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-26 19:35:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:35:24,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:24,890 INFO L422 BasicCegarLoop]: trace histogram [22, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:24,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:35:24,891 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:24,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:24,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1295443725, now seen corresponding path program 26 times [2020-10-26 19:35:24,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:24,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639411572] [2020-10-26 19:35:24,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:24,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:28,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:29,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:29,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:35:29,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:29,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:35:29,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:29,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:35:29,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:29,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:35:29,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:30,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:30,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:30,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:30,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:30,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:30,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:35:30,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:30,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:30,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:30,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:30,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:30,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:35:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:30,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:30,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:30,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:30,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:30,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:30,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:30,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:30,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:30,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:30,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:30,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:35:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:30,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:30,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:30,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:30,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:30,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:35:30,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:30,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:30,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:30,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:30,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:30,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:35:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:30,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:30,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:30,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:30,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:30,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:35:30,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:30,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:30,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:30,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:30,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:30,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:35:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:30,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:30,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:30,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:30,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:30,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:35:30,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:30,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:30,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:30,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:30,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2020-10-26 19:35:30,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639411572] [2020-10-26 19:35:30,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:30,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:35:30,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75302393] [2020-10-26 19:35:30,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:35:30,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:30,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:35:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:35:30,309 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 18 states. [2020-10-26 19:35:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:31,104 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2020-10-26 19:35:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:35:31,105 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-26 19:35:31,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:31,106 INFO L225 Difference]: With dead ends: 103 [2020-10-26 19:35:31,106 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:35:31,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:35:31,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:35:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-10-26 19:35:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:35:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-10-26 19:35:31,121 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 72 [2020-10-26 19:35:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:31,121 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-10-26 19:35:31,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:35:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-10-26 19:35:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:35:31,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:31,122 INFO L422 BasicCegarLoop]: trace histogram [22, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:31,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:35:31,123 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:31,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:31,123 INFO L82 PathProgramCache]: Analyzing trace with hash -993738238, now seen corresponding path program 27 times [2020-10-26 19:35:31,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:31,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996889657] [2020-10-26 19:35:31,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:31,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:36,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:35:36,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:36,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:35:36,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:35:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:35:36,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:36,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:36,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:36,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:36,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:36,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:36,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:36,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:36,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:36,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:36,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:36,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:35:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:36,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:36,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:36,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:36,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:36,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:36,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:36,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:36,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:36,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:36,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:35:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:36,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:36,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:36,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:36,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:36,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:36,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:36,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:36,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:36,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:35:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:36,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:36,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:36,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:36,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:36,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:36,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:36,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:36,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:36,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:35:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:36,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:36,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:36,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:36,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:36,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:36,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:36,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:36,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:36,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 8 proven. 253 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 19:35:36,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996889657] [2020-10-26 19:35:36,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:36,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:35:36,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183912977] [2020-10-26 19:35:36,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:35:36,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:35:36,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:35:36,563 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 26 states. [2020-10-26 19:35:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:36,827 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2020-10-26 19:35:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:35:36,827 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-10-26 19:35:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:36,828 INFO L225 Difference]: With dead ends: 166 [2020-10-26 19:35:36,829 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:35:36,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:35:36,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:35:36,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-26 19:35:36,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:35:36,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-10-26 19:35:36,844 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 73 [2020-10-26 19:35:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:36,844 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-10-26 19:35:36,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:35:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-10-26 19:35:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:35:36,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:36,847 INFO L422 BasicCegarLoop]: trace histogram [23, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:36,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:35:36,847 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:36,848 INFO L82 PathProgramCache]: Analyzing trace with hash -350678348, now seen corresponding path program 28 times [2020-10-26 19:35:36,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:36,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454396028] [2020-10-26 19:35:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:36,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:41,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:41,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:41,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:35:41,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:41,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:35:41,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:35:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:35:41,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:42,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:42,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:42,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:42,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:42,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:42,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:42,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:42,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:42,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:42,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:42,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:42,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:35:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:42,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:42,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:42,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:42,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:42,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:42,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:42,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:42,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:42,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:42,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:42,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:35:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:42,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:42,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:42,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:42,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:42,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:42,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:42,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:42,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:35:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:42,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:42,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:42,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:42,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:42,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:42,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:42,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:42,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:35:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:42,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:42,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:42,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:42,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:42,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:42,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:42,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:42,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:42,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 8 proven. 276 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 19:35:42,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454396028] [2020-10-26 19:35:42,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:42,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:35:42,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410550301] [2020-10-26 19:35:42,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:35:42,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:35:42,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:35:42,346 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 27 states. [2020-10-26 19:35:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:42,576 INFO L93 Difference]: Finished difference Result 167 states and 182 transitions. [2020-10-26 19:35:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:35:42,576 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2020-10-26 19:35:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:42,577 INFO L225 Difference]: With dead ends: 167 [2020-10-26 19:35:42,577 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:35:42,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 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 19:35:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:35:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-10-26 19:35:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:35:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2020-10-26 19:35:42,594 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 74 [2020-10-26 19:35:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:42,595 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2020-10-26 19:35:42,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:35:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2020-10-26 19:35:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:35:42,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:42,596 INFO L422 BasicCegarLoop]: trace histogram [24, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:42,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:35:42,596 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:42,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1890658238, now seen corresponding path program 29 times [2020-10-26 19:35:42,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:42,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472953709] [2020-10-26 19:35:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:42,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:42,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:47,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:47,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:35:47,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:47,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:35:47,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:35:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:35:47,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:48,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:48,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:48,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:48,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:48,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:48,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:48,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:48,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:48,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:48,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:48,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:48,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:35:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:48,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:48,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:48,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:48,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:48,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:48,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:48,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:48,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:48,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:48,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:48,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:35:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:48,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:48,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:48,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:48,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:48,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:48,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:48,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:48,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:48,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:48,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:48,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:35:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:48,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:48,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:48,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:48,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:48,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:48,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:48,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:48,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:48,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:48,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:48,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:35:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:48,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:48,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:48,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:48,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:48,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:48,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:48,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:48,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 8 proven. 300 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 19:35:48,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472953709] [2020-10-26 19:35:48,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:48,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:35:48,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352535656] [2020-10-26 19:35:48,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:35:48,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:48,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:35:48,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:35:48,098 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand 28 states. [2020-10-26 19:35:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:48,436 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2020-10-26 19:35:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:35:48,437 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2020-10-26 19:35:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:48,438 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:35:48,438 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:35:48,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:35:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:35:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-10-26 19:35:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:35:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-10-26 19:35:48,454 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 75 [2020-10-26 19:35:48,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:48,454 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-10-26 19:35:48,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:35:48,454 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-10-26 19:35:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:35:48,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:48,456 INFO L422 BasicCegarLoop]: trace histogram [25, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:48,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:35:48,456 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:48,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1909572724, now seen corresponding path program 30 times [2020-10-26 19:35:48,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:48,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377196353] [2020-10-26 19:35:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:48,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:48,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:53,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:53,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:35:53,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:53,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:35:53,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:53,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:35:53,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:53,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:35:53,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:53,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:53,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:53,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:53,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:53,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:53,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:53,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:53,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:53,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:53,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:35:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:53,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:53,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:53,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:53,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:53,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:53,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:53,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:53,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:35:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:53,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:53,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:53,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:53,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:53,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:53,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:53,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:53,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:53,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:53,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:53,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:35:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:53,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:53,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:53,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:53,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:53,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:53,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:53,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:53,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:53,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:35:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:53,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:53,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:53,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:53,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:53,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:53,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:53,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:53,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:53,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:53,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 8 proven. 325 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 19:35:53,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377196353] [2020-10-26 19:35:53,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:53,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:35:53,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926523642] [2020-10-26 19:35:53,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:35:53,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:53,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:35:53,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:35:53,960 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 29 states. [2020-10-26 19:35:54,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:54,177 INFO L93 Difference]: Finished difference Result 169 states and 184 transitions. [2020-10-26 19:35:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:35:54,177 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 76 [2020-10-26 19:35:54,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:54,179 INFO L225 Difference]: With dead ends: 169 [2020-10-26 19:35:54,179 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:35:54,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:35:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:35:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-10-26 19:35:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:35:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2020-10-26 19:35:54,205 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 76 [2020-10-26 19:35:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:54,205 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2020-10-26 19:35:54,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:35:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2020-10-26 19:35:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:35:54,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:54,207 INFO L422 BasicCegarLoop]: trace histogram [26, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:54,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:35:54,207 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:54,209 INFO L82 PathProgramCache]: Analyzing trace with hash -542351742, now seen corresponding path program 31 times [2020-10-26 19:35:54,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:54,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133625776] [2020-10-26 19:35:54,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:54,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:54,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:59,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:59,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:35:59,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:59,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:35:59,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:35:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:35:59,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:59,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:59,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:59,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:59,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:59,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:59,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:59,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:59,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:59,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:59,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:59,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:59,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:35:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:59,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:59,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:59,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:59,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:59,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:59,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:59,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:59,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:59,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:59,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:59,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:35:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:59,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:59,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:59,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:59,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:59,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:59,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:59,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:59,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:59,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:59,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:59,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:35:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:59,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:59,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:59,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:59,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:59,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:59,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:59,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:59,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:35:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:59,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:59,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:59,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:59,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:59,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:59,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:59,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 8 proven. 351 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 19:35:59,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133625776] [2020-10-26 19:35:59,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:59,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:35:59,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887284185] [2020-10-26 19:35:59,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:35:59,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:59,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:35:59,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:35:59,783 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand 30 states. [2020-10-26 19:36:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:00,171 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2020-10-26 19:36:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:36:00,171 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 77 [2020-10-26 19:36:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:00,173 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:36:00,173 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:36:00,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 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 19:36:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:36:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2020-10-26 19:36:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:36:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-26 19:36:00,183 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-10-26 19:36:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:00,183 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-26 19:36:00,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:36:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-26 19:36:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:36:00,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:00,184 INFO L422 BasicCegarLoop]: trace histogram [27, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:00,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:36:00,184 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:00,185 INFO L82 PathProgramCache]: Analyzing trace with hash 757401140, now seen corresponding path program 32 times [2020-10-26 19:36:00,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:00,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832077865] [2020-10-26 19:36:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:00,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:00,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:05,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:05,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:36:05,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:05,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:36:05,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:05,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:36:05,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:05,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:36:05,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:05,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:05,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:05,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:05,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:05,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:05,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:36:05,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:05,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:05,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:05,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:05,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:05,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:36:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:05,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:05,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:05,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:05,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:05,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:05,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:05,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:05,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:05,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:05,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:05,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:36:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:05,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:05,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:05,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:05,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:05,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:05,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:05,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:05,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:36:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:05,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:05,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:05,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:05,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:05,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:05,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:05,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:05,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:05,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:05,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:05,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:36:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:05,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:05,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:05,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:05,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:05,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:36:05,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:05,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 8 proven. 378 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 19:36:05,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832077865] [2020-10-26 19:36:05,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:05,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:36:05,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798004995] [2020-10-26 19:36:05,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:36:05,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:05,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:36:05,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:36:05,876 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 31 states. [2020-10-26 19:36:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:06,250 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-26 19:36:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:36:06,251 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 78 [2020-10-26 19:36:06,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:06,252 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:36:06,252 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:36:06,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 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 19:36:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:36:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-26 19:36:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:36:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-26 19:36:06,269 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-10-26 19:36:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:06,269 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-26 19:36:06,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:36:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-26 19:36:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:36:06,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:06,271 INFO L422 BasicCegarLoop]: trace histogram [28, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:06,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:36:06,271 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:06,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1899932478, now seen corresponding path program 33 times [2020-10-26 19:36:06,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:06,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944773116] [2020-10-26 19:36:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:06,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:06,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:11,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:11,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:36:11,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:11,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:36:11,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:36:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:11,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:36:11,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:11,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:11,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:11,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:11,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:11,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:11,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:11,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:11,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:11,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:36:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:11,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:11,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:11,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:11,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:11,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:11,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:11,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:11,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:11,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:11,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:11,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:36:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:11,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:11,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:11,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:11,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:11,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:11,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:11,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:11,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:11,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:11,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:11,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:36:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:11,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:11,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:11,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:11,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:11,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:11,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:11,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:11,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:11,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:11,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:11,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:36:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:11,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:11,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:11,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:11,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:11,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:11,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:11,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:11,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:11,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:11,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 8 proven. 406 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 19:36:11,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944773116] [2020-10-26 19:36:11,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:11,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:36:11,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679651110] [2020-10-26 19:36:11,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:36:11,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:11,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:36:11,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:36:11,912 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 32 states. [2020-10-26 19:36:12,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:12,312 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2020-10-26 19:36:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:36:12,313 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 79 [2020-10-26 19:36:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:12,314 INFO L225 Difference]: With dead ends: 137 [2020-10-26 19:36:12,314 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:36:12,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:36:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:36:12,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-10-26 19:36:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:36:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-26 19:36:12,326 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-26 19:36:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:12,327 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-26 19:36:12,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:36:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-26 19:36:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:36:12,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:12,328 INFO L422 BasicCegarLoop]: trace histogram [29, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:12,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:36:12,328 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:12,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:12,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1622071284, now seen corresponding path program 34 times [2020-10-26 19:36:12,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:12,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182416598] [2020-10-26 19:36:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:12,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:12,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:17,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:17,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:36:17,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:17,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:36:17,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:17,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:36:17,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:17,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:36:17,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:17,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:17,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:17,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:17,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:17,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:17,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:17,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:17,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:17,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:36:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:17,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:17,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:17,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:17,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:17,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:17,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:17,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:17,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:17,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:17,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:17,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:36:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:17,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:17,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:17,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:17,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:17,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:17,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:17,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:17,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:17,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:17,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:17,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:36:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:17,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:17,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:17,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:17,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:17,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:17,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:17,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:17,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:17,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:36:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:17,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:17,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:17,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:17,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:17,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:17,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:17,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:17,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:17,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:17,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 8 proven. 435 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 19:36:18,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182416598] [2020-10-26 19:36:18,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:18,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:36:18,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241419345] [2020-10-26 19:36:18,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:36:18,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:36:18,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:36:18,002 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 33 states. [2020-10-26 19:36:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:18,336 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-10-26 19:36:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:36:18,337 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-10-26 19:36:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:18,338 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:36:18,338 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:36:18,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:36:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:36:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2020-10-26 19:36:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:36:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-26 19:36:18,355 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 80 [2020-10-26 19:36:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:18,358 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-26 19:36:18,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:36:18,358 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-26 19:36:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:36:18,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:18,359 INFO L422 BasicCegarLoop]: trace histogram [30, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:18,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:36:18,359 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:18,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:18,360 INFO L82 PathProgramCache]: Analyzing trace with hash -864961790, now seen corresponding path program 35 times [2020-10-26 19:36:18,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:18,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844851910] [2020-10-26 19:36:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:18,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:18,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:23,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:23,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:36:23,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:23,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:36:23,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:23,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:36:23,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:23,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:36:23,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:24,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:24,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:24,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:24,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:24,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:24,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:24,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:24,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:24,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:24,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:24,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:24,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:36:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:24,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:24,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:24,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:24,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:24,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:24,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:24,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:24,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:24,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:24,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:24,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:36:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:24,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:24,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:24,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:24,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:24,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:24,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:24,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:24,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:24,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:24,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:24,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:36:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:24,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:24,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:24,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:24,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:24,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:24,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:24,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:24,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:24,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:24,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:24,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-26 19:36:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:24,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:24,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:24,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:24,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:24,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:24,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:24,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:24,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:24,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:24,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 8 proven. 465 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 19:36:24,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844851910] [2020-10-26 19:36:24,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:24,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:36:24,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853556708] [2020-10-26 19:36:24,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:36:24,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:24,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:36:24,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:36:24,063 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 34 states. [2020-10-26 19:36:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:24,480 INFO L93 Difference]: Finished difference Result 139 states and 145 transitions. [2020-10-26 19:36:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:36:24,481 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 81 [2020-10-26 19:36:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:24,482 INFO L225 Difference]: With dead ends: 139 [2020-10-26 19:36:24,482 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:36:24,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:36:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:36:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2020-10-26 19:36:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:36:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-26 19:36:24,495 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2020-10-26 19:36:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:24,495 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-26 19:36:24,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:36:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-26 19:36:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:36:24,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:24,497 INFO L422 BasicCegarLoop]: trace histogram [31, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:24,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:36:24,497 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash -653575756, now seen corresponding path program 36 times [2020-10-26 19:36:24,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:24,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922243087] [2020-10-26 19:36:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:24,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:24,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:29,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:29,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:36:29,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:29,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:36:29,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:29,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:36:29,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:29,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:36:29,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:30,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:30,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:30,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:30,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:30,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:30,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:30,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:30,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:36:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:30,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:30,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:30,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:30,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:30,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:30,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:30,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:30,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:36:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:30,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:30,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:30,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:36:30,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:30,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:30,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:30,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:30,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:36:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:30,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:30,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:30,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:30,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:30,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:30,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:30,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:30,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:36:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:30,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:30,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:30,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:30,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:30,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:30,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:30,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:30,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 8 proven. 496 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 19:36:30,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922243087] [2020-10-26 19:36:30,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:30,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:36:30,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791472372] [2020-10-26 19:36:30,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:36:30,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:30,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:36:30,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:36:30,233 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 35 states. [2020-10-26 19:36:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:30,646 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2020-10-26 19:36:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:36:30,647 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 82 [2020-10-26 19:36:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:30,648 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:36:30,648 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:36:30,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:36:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:36:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-10-26 19:36:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:36:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-26 19:36:30,667 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2020-10-26 19:36:30,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:30,667 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-26 19:36:30,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:36:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-26 19:36:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:36:30,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:30,668 INFO L422 BasicCegarLoop]: trace histogram [32, 7, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:30,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:36:30,669 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:30,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1292151917, now seen corresponding path program 37 times [2020-10-26 19:36:30,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:30,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462249111] [2020-10-26 19:36:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:35,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:35,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:36:35,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:35,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:36:35,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:35,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:36:35,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:35,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:36:35,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:36,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:36,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:36,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:36,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:36,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:36,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:36,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:36,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:36,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:36,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:36,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:36,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:36:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:36,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:36,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:36,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:36,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:36,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:36:36,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:36,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:36,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:36,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:36,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:36:36,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:36:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:36,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:36,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:36,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:36,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:36,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:36,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:36,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:36,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:36:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:36,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:36,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:36,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:36,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:36,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:36,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:36,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:36,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:36,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:36,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:36,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:36:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:36,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:36,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:36,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:36,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:36,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:36,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:36,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:36,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:36,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:36,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 8 proven. 528 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-26 19:36:36,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462249111] [2020-10-26 19:36:36,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:36,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:36:36,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088399707] [2020-10-26 19:36:36,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:36:36,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:36:36,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:36:36,395 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 36 states. [2020-10-26 19:36:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:36,814 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2020-10-26 19:36:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:36:36,814 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 84 [2020-10-26 19:36:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:36,815 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:36:36,815 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:36:36,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:36:36,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:36:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2020-10-26 19:36:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:36:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-26 19:36:36,840 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-10-26 19:36:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:36,840 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-26 19:36:36,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:36:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-26 19:36:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:36:36,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:36,841 INFO L422 BasicCegarLoop]: trace histogram [33, 7, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:36,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:36:36,841 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:36,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:36,842 INFO L82 PathProgramCache]: Analyzing trace with hash -312868959, now seen corresponding path program 38 times [2020-10-26 19:36:36,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:36,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278425777] [2020-10-26 19:36:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:36,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:36,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:41,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:41,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:36:41,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:41,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:36:41,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:36:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:36:41,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:42,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:42,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:42,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:42,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:42,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:42,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:36:42,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:42,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:42,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:42,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:42,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:42,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:36:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:42,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:42,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:42,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:42,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:42,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:42,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:42,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:42,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:42,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:42,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:42,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:36:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:42,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:42,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:42,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:42,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:42,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:42,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:42,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:42,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:36:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:42,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:42,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:42,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:42,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:42,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:42,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:42,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:42,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:42,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:42,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:42,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-26 19:36:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:42,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:42,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:42,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:42,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:42,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:42,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:42,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:42,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:42,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:42,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 8 proven. 561 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-26 19:36:42,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278425777] [2020-10-26 19:36:42,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:42,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:36:42,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008868366] [2020-10-26 19:36:42,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:36:42,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:42,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:36:42,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:36:42,619 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 37 states. [2020-10-26 19:36:42,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:42,966 INFO L93 Difference]: Finished difference Result 147 states and 154 transitions. [2020-10-26 19:36:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:36:42,966 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 85 [2020-10-26 19:36:42,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:42,967 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:36:42,967 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:36:42,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:36:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:36:42,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-10-26 19:36:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:36:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-26 19:36:42,980 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 85 [2020-10-26 19:36:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:42,980 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-26 19:36:42,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:36:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-26 19:36:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:36:42,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:42,981 INFO L422 BasicCegarLoop]: trace histogram [34, 7, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:42,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:36:42,981 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:42,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:42,982 INFO L82 PathProgramCache]: Analyzing trace with hash -19868333, now seen corresponding path program 39 times [2020-10-26 19:36:42,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:42,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994984270] [2020-10-26 19:36:42,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:43,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:43,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:48,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:48,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:36:48,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:48,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:36:48,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:48,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:36:48,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:48,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:36:48,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:36:48,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:48,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:48,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:48,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:48,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:48,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:48,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:48,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:48,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:48,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:48,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:48,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:36:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:48,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:48,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:48,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:48,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:48,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:48,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:48,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:48,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:36:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:48,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:48,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:48,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:48,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:48,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:48,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:48,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:48,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:48,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:48,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:48,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:36:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:48,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:48,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:48,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:48,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:48,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:48,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:48,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:48,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:36:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:48,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:48,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:48,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:48,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:48,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:48,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:48,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:48,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:48,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:48,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 595 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-26 19:36:48,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994984270] [2020-10-26 19:36:48,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:48,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:36:48,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609240849] [2020-10-26 19:36:48,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:36:48,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:48,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:36:48,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:36:48,897 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 38 states. [2020-10-26 19:36:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:49,360 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2020-10-26 19:36:49,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:36:49,360 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2020-10-26 19:36:49,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:49,362 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:36:49,362 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:36:49,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:36:49,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:36:49,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-10-26 19:36:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:36:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-26 19:36:49,374 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 86 [2020-10-26 19:36:49,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:49,374 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-26 19:36:49,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:36:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-26 19:36:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:36:49,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:49,375 INFO L422 BasicCegarLoop]: trace histogram [35, 7, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:49,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:36:49,375 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:49,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:49,376 INFO L82 PathProgramCache]: Analyzing trace with hash 473216481, now seen corresponding path program 40 times [2020-10-26 19:36:49,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:49,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508146888] [2020-10-26 19:36:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:49,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:49,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:54,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:54,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:36:54,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:54,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:36:54,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:54,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:36:54,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:54,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:36:54,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0