/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:55:11,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:55:11,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:55:11,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:55:11,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:55:11,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:55:11,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:55:11,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:55:11,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:55:11,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:55:11,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:55:11,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:55:11,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:55:11,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:55:11,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:55:11,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:55:11,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:55:11,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:55:11,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:55:11,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:55:11,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:55:11,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:55:11,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:55:11,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:55:11,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:55:11,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:55:11,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:55:11,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:55:11,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:55:11,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:55:11,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:55:11,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:55:11,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:55:11,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:55:11,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:55:11,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:55:11,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:55:11,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:55:11,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:55:11,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:55:11,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:55:11,476 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 [2020-10-28 18:55:11,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:55:11,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:55:11,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:55:11,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:55:11,538 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:55:11,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:55:11,539 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:55:11,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:55:11,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:55:11,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:55:11,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:55:11,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:55:11,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:55:11,542 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:55:11,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:55:11,542 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:55:11,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:55:11,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:55:11,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:55:11,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:55:11,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:55:11,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:55:11,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:55:11,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:55:11,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:55:11,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:55:11,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:55:11,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:55:11,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:55:11,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:55:11,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:55:11,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:55:11,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:55:11,930 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:55:11,930 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:55:11,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:55:12,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8903b6dc2/5a923b4d62ff446b98c5dff201c010cb/FLAG394e358b2 [2020-10-28 18:55:13,064 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:55:13,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:55:13,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8903b6dc2/5a923b4d62ff446b98c5dff201c010cb/FLAG394e358b2 [2020-10-28 18:55:13,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8903b6dc2/5a923b4d62ff446b98c5dff201c010cb [2020-10-28 18:55:13,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:55:13,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:55:13,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:55:13,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:55:13,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:55:13,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:55:13" (1/1) ... [2020-10-28 18:55:13,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5828a90f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:55:13, skipping insertion in model container [2020-10-28 18:55:13,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:55:13" (1/1) ... [2020-10-28 18:55:13,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:55:13,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:55:14,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:55:14,786 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:55:15,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:55:15,083 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:55:15,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:55:15 WrapperNode [2020-10-28 18:55:15,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:55:15,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:55:15,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:55:15,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:55:15,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:55:15" (1/1) ... [2020-10-28 18:55:15,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:55:15" (1/1) ... [2020-10-28 18:55:15,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:55:15" (1/1) ... [2020-10-28 18:55:15,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:55:15" (1/1) ... [2020-10-28 18:55:15,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:55:15" (1/1) ... [2020-10-28 18:55:15,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:55:15" (1/1) ... [2020-10-28 18:55:15,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:55:15" (1/1) ... [2020-10-28 18:55:15,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:55:15,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:55:15,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:55:15,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:55:15,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:55:15" (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 [2020-10-28 18:55:15,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:55:15,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:55:15,473 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:55:15,473 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:55:15,473 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:55:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:55:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:55:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:55:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:55:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:55:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:55:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:55:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:55:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:55:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:55:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:55:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:55:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:55:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:55:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:55:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:55:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:55:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:55:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:55:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:55:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:55:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:55:15,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:55:19,273 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:55:19,273 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:55:19,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:55:19 BoogieIcfgContainer [2020-10-28 18:55:19,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:55:19,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:55:19,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:55:19,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:55:19,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:55:13" (1/3) ... [2020-10-28 18:55:19,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6d38c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:55:19, skipping insertion in model container [2020-10-28 18:55:19,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:55:15" (2/3) ... [2020-10-28 18:55:19,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6d38c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:55:19, skipping insertion in model container [2020-10-28 18:55:19,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:55:19" (3/3) ... [2020-10-28 18:55:19,287 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:55:19,299 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:55:19,306 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:55:19,320 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:55:19,360 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:55:19,360 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:55:19,360 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:55:19,360 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:55:19,361 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:55:19,361 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:55:19,361 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:55:19,361 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:55:19,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states. [2020-10-28 18:55:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:55:19,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:19,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:19,427 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:19,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:19,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1096909937, now seen corresponding path program 1 times [2020-10-28 18:55:19,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:19,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449594152] [2020-10-28 18:55:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:20,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:20,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:20,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:21,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:22,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:23,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:23,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:23,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:24,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:24,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:55:24,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:55:24,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:55:24,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:24,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:55:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:55:24,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:55:25,881 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:55:25,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:25,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:25,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:25,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:25,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:25,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 18:55:25,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:25,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:25,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:25,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:25,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:25,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:25,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449594152] [2020-10-28 18:55:25,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:25,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:55:25,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125898330] [2020-10-28 18:55:25,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:25,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:25,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:25,989 INFO L87 Difference]: Start difference. First operand 1263 states. Second operand 8 states. [2020-10-28 18:55:26,993 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:55:35,988 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:55:38,025 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:55:39,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:39,353 INFO L93 Difference]: Finished difference Result 2375 states and 4088 transitions. [2020-10-28 18:55:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:55:39,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 18:55:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:39,391 INFO L225 Difference]: With dead ends: 2375 [2020-10-28 18:55:39,391 INFO L226 Difference]: Without dead ends: 1795 [2020-10-28 18:55:39,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:55:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2020-10-28 18:55:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1426. [2020-10-28 18:55:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1426 states. [2020-10-28 18:55:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 1954 transitions. [2020-10-28 18:55:39,581 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 1954 transitions. Word has length 56 [2020-10-28 18:55:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:39,583 INFO L481 AbstractCegarLoop]: Abstraction has 1426 states and 1954 transitions. [2020-10-28 18:55:39,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 1954 transitions. [2020-10-28 18:55:39,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:55:39,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:39,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:39,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:55:39,594 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:39,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1066679324, now seen corresponding path program 1 times [2020-10-28 18:55:39,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:39,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831917297] [2020-10-28 18:55:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:39,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:40,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:40,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:40,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:40,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:42,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:43,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:44,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:44,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:55:44,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:55:44,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:55:44,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:44,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:55:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:55:44,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:45,519 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:55:45,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:45,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:45,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:45,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:45,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:45,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:55:45,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:45,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:45,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:45,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831917297] [2020-10-28 18:55:45,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:45,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:55:45,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556302980] [2020-10-28 18:55:45,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:55:45,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:45,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:55:45,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:55:45,583 INFO L87 Difference]: Start difference. First operand 1426 states and 1954 transitions. Second operand 4 states. [2020-10-28 18:55:46,472 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 18:55:51,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:51,113 INFO L93 Difference]: Finished difference Result 2182 states and 3082 transitions. [2020-10-28 18:55:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:55:51,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:55:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:51,132 INFO L225 Difference]: With dead ends: 2182 [2020-10-28 18:55:51,132 INFO L226 Difference]: Without dead ends: 1519 [2020-10-28 18:55:51,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:55:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2020-10-28 18:55:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1513. [2020-10-28 18:55:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1513 states. [2020-10-28 18:55:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2108 transitions. [2020-10-28 18:55:51,220 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2108 transitions. Word has length 57 [2020-10-28 18:55:51,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:51,221 INFO L481 AbstractCegarLoop]: Abstraction has 1513 states and 2108 transitions. [2020-10-28 18:55:51,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:55:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2108 transitions. [2020-10-28 18:55:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:55:51,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:51,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:51,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:55:51,225 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash -13712135, now seen corresponding path program 1 times [2020-10-28 18:55:51,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:51,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688524696] [2020-10-28 18:55:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:51,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:52,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:52,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:52,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:53,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:54,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:54,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:54,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:55,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:56,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:56,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:55:56,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:55:56,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:55:56,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:56,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:56,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:55:56,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:55:56,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:55:56,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:57,242 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:55:57,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:57,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:57,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:57,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:57,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:57,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 18:55:57,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:57,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:57,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:57,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:57,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:55:57,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:57,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688524696] [2020-10-28 18:55:57,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:57,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:55:57,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040509698] [2020-10-28 18:55:57,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:55:57,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:57,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:55:57,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:55:57,346 INFO L87 Difference]: Start difference. First operand 1513 states and 2108 transitions. Second operand 6 states. [2020-10-28 18:55:58,345 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:56:03,719 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 18:56:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:04,718 INFO L93 Difference]: Finished difference Result 2548 states and 3664 transitions. [2020-10-28 18:56:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:56:04,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-28 18:56:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:04,740 INFO L225 Difference]: With dead ends: 2548 [2020-10-28 18:56:04,740 INFO L226 Difference]: Without dead ends: 1809 [2020-10-28 18:56:04,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:56:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-10-28 18:56:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1802. [2020-10-28 18:56:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1802 states. [2020-10-28 18:56:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 2571 transitions. [2020-10-28 18:56:04,841 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 2571 transitions. Word has length 57 [2020-10-28 18:56:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:04,844 INFO L481 AbstractCegarLoop]: Abstraction has 1802 states and 2571 transitions. [2020-10-28 18:56:04,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:56:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 2571 transitions. [2020-10-28 18:56:04,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:56:04,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:04,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:04,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:56:04,848 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:04,849 INFO L82 PathProgramCache]: Analyzing trace with hash 7588088, now seen corresponding path program 1 times [2020-10-28 18:56:04,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:04,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357465844] [2020-10-28 18:56:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:04,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:06,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:06,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:07,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:08,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:08,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:09,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:09,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:56:09,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:56:09,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:56:09,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:09,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:09,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:56:09,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:56:09,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:56:09,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:56:11,125 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:56:11,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:11,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:11,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:11,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:11,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:11,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:56:11,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:11,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:11,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:11,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:11,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:11,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:56:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:11,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357465844] [2020-10-28 18:56:11,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:11,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:56:11,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74365372] [2020-10-28 18:56:11,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:56:11,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:56:11,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:56:11,193 INFO L87 Difference]: Start difference. First operand 1802 states and 2571 transitions. Second operand 8 states. [2020-10-28 18:56:12,198 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 18:56:17,297 WARN L193 SmtUtils]: Spent 952.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2020-10-28 18:56:18,943 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 18:56:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:20,258 INFO L93 Difference]: Finished difference Result 3754 states and 5647 transitions. [2020-10-28 18:56:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:56:20,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-28 18:56:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:20,277 INFO L225 Difference]: With dead ends: 3754 [2020-10-28 18:56:20,277 INFO L226 Difference]: Without dead ends: 3110 [2020-10-28 18:56:20,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:56:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2020-10-28 18:56:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 1790. [2020-10-28 18:56:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1790 states. [2020-10-28 18:56:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2554 transitions. [2020-10-28 18:56:20,402 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2554 transitions. Word has length 57 [2020-10-28 18:56:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:20,402 INFO L481 AbstractCegarLoop]: Abstraction has 1790 states and 2554 transitions. [2020-10-28 18:56:20,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:56:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2554 transitions. [2020-10-28 18:56:20,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:56:20,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:20,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:20,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:56:20,408 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:20,408 INFO L82 PathProgramCache]: Analyzing trace with hash 129982199, now seen corresponding path program 1 times [2020-10-28 18:56:20,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:20,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549522835] [2020-10-28 18:56:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:20,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:20,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:20,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:20,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:21,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:21,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:22,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:22,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:23,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:23,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:23,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:23,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:24,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:25,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:25,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:56:25,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:56:25,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:56:25,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:25,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:25,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:56:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:56:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:56:25,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:26,635 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:56:26,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:26,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:26,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:26,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:26,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 18:56:26,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:26,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:26,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:56:26,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:26,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549522835] [2020-10-28 18:56:26,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:26,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:56:26,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266748988] [2020-10-28 18:56:26,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:56:26,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:26,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:56:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:56:26,725 INFO L87 Difference]: Start difference. First operand 1790 states and 2554 transitions. Second operand 11 states. [2020-10-28 18:56:27,763 WARN L193 SmtUtils]: Spent 937.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 18:56:32,467 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:56:33,749 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 18:56:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:37,215 INFO L93 Difference]: Finished difference Result 6777 states and 10008 transitions. [2020-10-28 18:56:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 18:56:37,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-28 18:56:37,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:37,242 INFO L225 Difference]: With dead ends: 6777 [2020-10-28 18:56:37,242 INFO L226 Difference]: Without dead ends: 5016 [2020-10-28 18:56:37,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2020-10-28 18:56:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5016 states. [2020-10-28 18:56:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5016 to 2449. [2020-10-28 18:56:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2449 states. [2020-10-28 18:56:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 3482 transitions. [2020-10-28 18:56:37,489 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 3482 transitions. Word has length 58 [2020-10-28 18:56:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:37,489 INFO L481 AbstractCegarLoop]: Abstraction has 2449 states and 3482 transitions. [2020-10-28 18:56:37,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:56:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 3482 transitions. [2020-10-28 18:56:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:56:37,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:37,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:37,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:56:37,493 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:37,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1253215674, now seen corresponding path program 1 times [2020-10-28 18:56:37,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:37,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822504669] [2020-10-28 18:56:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:37,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:37,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:37,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:37,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:38,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:38,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:38,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:39,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:39,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:39,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:39,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:39,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:40,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:40,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:40,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:41,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:42,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:42,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:42,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:56:42,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:56:42,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:56:42,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:42,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:42,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:56:42,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:56:42,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 18:56:42,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:43,516 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:56:43,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:43,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:43,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:43,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:43,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:43,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 18:56:43,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:43,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:43,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:43,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:56:43,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:43,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822504669] [2020-10-28 18:56:43,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:43,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:56:43,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566389168] [2020-10-28 18:56:43,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:56:43,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:43,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:56:43,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:56:43,609 INFO L87 Difference]: Start difference. First operand 2449 states and 3482 transitions. Second operand 10 states. [2020-10-28 18:56:44,676 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:56:48,316 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:56:49,436 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-28 18:56:52,603 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:56:53,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:53,498 INFO L93 Difference]: Finished difference Result 8438 states and 12719 transitions. [2020-10-28 18:56:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 18:56:53,499 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-28 18:56:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:53,534 INFO L225 Difference]: With dead ends: 8438 [2020-10-28 18:56:53,534 INFO L226 Difference]: Without dead ends: 7011 [2020-10-28 18:56:53,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:56:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7011 states. [2020-10-28 18:56:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7011 to 2887. [2020-10-28 18:56:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2020-10-28 18:56:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4187 transitions. [2020-10-28 18:56:53,865 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4187 transitions. Word has length 58 [2020-10-28 18:56:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:53,865 INFO L481 AbstractCegarLoop]: Abstraction has 2887 states and 4187 transitions. [2020-10-28 18:56:53,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:56:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4187 transitions. [2020-10-28 18:56:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:56:53,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:53,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:53,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:56:53,869 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:53,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:53,869 INFO L82 PathProgramCache]: Analyzing trace with hash -48630988, now seen corresponding path program 1 times [2020-10-28 18:56:53,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:53,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851103967] [2020-10-28 18:56:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:54,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:54,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:54,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:54,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:54,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:55,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:55,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:56,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:56,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:56,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:57,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:57,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:57,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:58,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:58,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:58,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:56:58,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:56:58,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:56:58,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:58,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:58,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:56:58,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:56:58,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:56:58,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:59,907 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:56:59,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:59,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:59,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:59,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:59,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:59,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:56:59,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:59,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:59,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:59,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:59,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:59,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:59,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851103967] [2020-10-28 18:56:59,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:59,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:56:59,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759160135] [2020-10-28 18:56:59,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:56:59,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:59,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:56:59,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:56:59,956 INFO L87 Difference]: Start difference. First operand 2887 states and 4187 transitions. Second operand 9 states. [2020-10-28 18:57:00,988 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:57:04,493 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:57:05,412 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:57:09,597 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:57:10,686 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:57:12,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:12,369 INFO L93 Difference]: Finished difference Result 15184 states and 23426 transitions. [2020-10-28 18:57:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 18:57:12,369 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-28 18:57:12,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:12,417 INFO L225 Difference]: With dead ends: 15184 [2020-10-28 18:57:12,417 INFO L226 Difference]: Without dead ends: 13482 [2020-10-28 18:57:12,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2020-10-28 18:57:12,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13482 states. [2020-10-28 18:57:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13482 to 3740. [2020-10-28 18:57:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3740 states. [2020-10-28 18:57:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3740 states to 3740 states and 5457 transitions. [2020-10-28 18:57:12,916 INFO L78 Accepts]: Start accepts. Automaton has 3740 states and 5457 transitions. Word has length 58 [2020-10-28 18:57:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:12,916 INFO L481 AbstractCegarLoop]: Abstraction has 3740 states and 5457 transitions. [2020-10-28 18:57:12,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:57:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3740 states and 5457 transitions. [2020-10-28 18:57:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:57:12,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:12,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:12,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:57:12,919 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2003024578, now seen corresponding path program 1 times [2020-10-28 18:57:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:12,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282013590] [2020-10-28 18:57:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:12,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:16,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:16,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:57:16,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:57:16,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3710 [2020-10-28 18:57:16,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:16,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:16,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:16,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 18:57:16,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:57:16,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:17,569 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:57:17,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:17,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:17,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:17,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:17,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:17,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:57:17,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:17,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:17,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:57:17,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282013590] [2020-10-28 18:57:17,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:17,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:17,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459488250] [2020-10-28 18:57:17,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:17,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:17,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:17,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:17,615 INFO L87 Difference]: Start difference. First operand 3740 states and 5457 transitions. Second operand 4 states. [2020-10-28 18:57:20,528 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 18:57:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:22,107 INFO L93 Difference]: Finished difference Result 5882 states and 8819 transitions. [2020-10-28 18:57:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:22,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-28 18:57:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:22,117 INFO L225 Difference]: With dead ends: 5882 [2020-10-28 18:57:22,118 INFO L226 Difference]: Without dead ends: 3357 [2020-10-28 18:57:22,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:22,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2020-10-28 18:57:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 2513. [2020-10-28 18:57:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2513 states. [2020-10-28 18:57:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3622 transitions. [2020-10-28 18:57:22,406 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3622 transitions. Word has length 59 [2020-10-28 18:57:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:22,406 INFO L481 AbstractCegarLoop]: Abstraction has 2513 states and 3622 transitions. [2020-10-28 18:57:22,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:57:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3622 transitions. [2020-10-28 18:57:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:57:22,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:22,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:22,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:57:22,409 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:22,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:22,410 INFO L82 PathProgramCache]: Analyzing trace with hash 134778614, now seen corresponding path program 1 times [2020-10-28 18:57:22,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:22,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079198386] [2020-10-28 18:57:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:22,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:22,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:22,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:23,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:23,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:26,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:26,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:57:26,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:57:26,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4202 [2020-10-28 18:57:26,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:26,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:26,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:26,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 18:57:26,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:57:26,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:27,496 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:57:27,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:27,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:27,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:27,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:27,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:27,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:57:27,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:27,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:27,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:27,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:27,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:27,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:57:27,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079198386] [2020-10-28 18:57:27,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:27,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:27,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000133688] [2020-10-28 18:57:27,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:27,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:27,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:27,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:27,546 INFO L87 Difference]: Start difference. First operand 2513 states and 3622 transitions. Second operand 4 states. [2020-10-28 18:57:30,299 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 18:57:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:31,894 INFO L93 Difference]: Finished difference Result 5130 states and 7638 transitions. [2020-10-28 18:57:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:31,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-28 18:57:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:31,903 INFO L225 Difference]: With dead ends: 5130 [2020-10-28 18:57:31,903 INFO L226 Difference]: Without dead ends: 3425 [2020-10-28 18:57:31,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2020-10-28 18:57:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 3026. [2020-10-28 18:57:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3026 states. [2020-10-28 18:57:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 4358 transitions. [2020-10-28 18:57:32,245 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 4358 transitions. Word has length 59 [2020-10-28 18:57:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:32,245 INFO L481 AbstractCegarLoop]: Abstraction has 3026 states and 4358 transitions. [2020-10-28 18:57:32,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:57:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 4358 transitions. [2020-10-28 18:57:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:57:32,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:32,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:32,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:57:32,251 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:32,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:32,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1976745880, now seen corresponding path program 1 times [2020-10-28 18:57:32,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:32,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123723391] [2020-10-28 18:57:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:32,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:32,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:32,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:32,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:33,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:36,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:36,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:57:36,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:57:36,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4331 [2020-10-28 18:57:36,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:36,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:36,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:36,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 18:57:36,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:57:36,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:37,553 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:57:37,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:37,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:37,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:37,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:37,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:37,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:57:37,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:37,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:37,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:37,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:37,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:37,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:57:37,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123723391] [2020-10-28 18:57:37,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:37,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:37,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247145492] [2020-10-28 18:57:37,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:37,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:37,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:37,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:37,593 INFO L87 Difference]: Start difference. First operand 3026 states and 4358 transitions. Second operand 4 states. [2020-10-28 18:57:40,659 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 18:57:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:42,063 INFO L93 Difference]: Finished difference Result 6700 states and 9924 transitions. [2020-10-28 18:57:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:42,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-28 18:57:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:42,074 INFO L225 Difference]: With dead ends: 6700 [2020-10-28 18:57:42,074 INFO L226 Difference]: Without dead ends: 4397 [2020-10-28 18:57:42,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:42,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2020-10-28 18:57:42,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 4394. [2020-10-28 18:57:42,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4394 states. [2020-10-28 18:57:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 6339 transitions. [2020-10-28 18:57:42,678 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 6339 transitions. Word has length 59 [2020-10-28 18:57:42,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:42,679 INFO L481 AbstractCegarLoop]: Abstraction has 4394 states and 6339 transitions. [2020-10-28 18:57:42,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:57:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 6339 transitions. [2020-10-28 18:57:42,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:57:42,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:42,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:42,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:57:42,682 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:42,682 INFO L82 PathProgramCache]: Analyzing trace with hash -621846019, now seen corresponding path program 1 times [2020-10-28 18:57:42,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:42,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481530105] [2020-10-28 18:57:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:42,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:42,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:43,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:43,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:43,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:43,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:43,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:44,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:46,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:46,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:57:46,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:57:46,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4252 [2020-10-28 18:57:46,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:46,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:57:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:57:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:57:46,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:48,183 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:57:48,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:48,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:48,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:48,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:48,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:48,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:57:48,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:48,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:48,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:57:48,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481530105] [2020-10-28 18:57:48,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:48,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-28 18:57:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539136646] [2020-10-28 18:57:48,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:57:48,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:57:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:57:48,247 INFO L87 Difference]: Start difference. First operand 4394 states and 6339 transitions. Second operand 13 states. [2020-10-28 18:57:49,270 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:57:49,777 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-28 18:57:53,898 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:57:54,932 WARN L193 SmtUtils]: Spent 957.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:57:57,715 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:57:58,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:58,846 INFO L93 Difference]: Finished difference Result 6844 states and 9946 transitions. [2020-10-28 18:57:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 18:57:58,847 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-10-28 18:57:58,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:58,864 INFO L225 Difference]: With dead ends: 6844 [2020-10-28 18:57:58,864 INFO L226 Difference]: Without dead ends: 6839 [2020-10-28 18:57:58,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2020-10-28 18:57:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6839 states. [2020-10-28 18:57:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6839 to 4391. [2020-10-28 18:57:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4391 states. [2020-10-28 18:57:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4391 states to 4391 states and 6334 transitions. [2020-10-28 18:57:59,497 INFO L78 Accepts]: Start accepts. Automaton has 4391 states and 6334 transitions. Word has length 61 [2020-10-28 18:57:59,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:59,498 INFO L481 AbstractCegarLoop]: Abstraction has 4391 states and 6334 transitions. [2020-10-28 18:57:59,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:57:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4391 states and 6334 transitions. [2020-10-28 18:57:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:57:59,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:59,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:59,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:57:59,500 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash -537562863, now seen corresponding path program 1 times [2020-10-28 18:57:59,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:59,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143305272] [2020-10-28 18:57:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:59,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:59,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:59,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:59,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:00,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:00,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:00,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:00,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:02,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:02,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:58:02,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:58:02,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3104 [2020-10-28 18:58:02,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:02,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:02,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:58:02,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:58:02,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:58:02,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:03,843 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:58:03,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:03,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:03,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:03,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:03,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:03,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:58:03,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:03,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:03,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:03,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:03,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:03,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:03,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143305272] [2020-10-28 18:58:03,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:03,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:58:03,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691319883] [2020-10-28 18:58:03,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:58:03,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:03,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:58:03,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:58:03,898 INFO L87 Difference]: Start difference. First operand 4391 states and 6334 transitions. Second operand 9 states. [2020-10-28 18:58:04,906 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-28 18:58:08,655 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-28 18:58:10,965 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-28 18:58:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:12,304 INFO L93 Difference]: Finished difference Result 7233 states and 10616 transitions. [2020-10-28 18:58:12,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:58:12,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-28 18:58:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:12,317 INFO L225 Difference]: With dead ends: 7233 [2020-10-28 18:58:12,317 INFO L226 Difference]: Without dead ends: 7228 [2020-10-28 18:58:12,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:58:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7228 states. [2020-10-28 18:58:13,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7228 to 4388. [2020-10-28 18:58:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4388 states. [2020-10-28 18:58:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 6329 transitions. [2020-10-28 18:58:13,055 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 6329 transitions. Word has length 61 [2020-10-28 18:58:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:13,055 INFO L481 AbstractCegarLoop]: Abstraction has 4388 states and 6329 transitions. [2020-10-28 18:58:13,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:58:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 6329 transitions. [2020-10-28 18:58:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:58:13,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:13,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:13,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:58:13,058 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:13,058 INFO L82 PathProgramCache]: Analyzing trace with hash 493972963, now seen corresponding path program 1 times [2020-10-28 18:58:13,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:13,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83692905] [2020-10-28 18:58:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:13,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:13,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:13,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:13,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:14,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:14,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:14,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:16,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:16,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:58:16,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:58:16,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3761 [2020-10-28 18:58:16,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:16,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:58:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:58:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:58:16,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:17,872 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:58:17,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:17,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:17,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:17,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:17,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:17,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:58:17,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:17,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:17,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:17,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:17,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:17,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:17,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83692905] [2020-10-28 18:58:17,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:17,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:58:17,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994847881] [2020-10-28 18:58:17,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:58:17,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:17,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:58:17,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:58:17,922 INFO L87 Difference]: Start difference. First operand 4388 states and 6329 transitions. Second operand 9 states. [2020-10-28 18:58:18,912 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:58:23,326 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:58:24,469 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:58:25,470 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:58:27,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:27,677 INFO L93 Difference]: Finished difference Result 11129 states and 16316 transitions. [2020-10-28 18:58:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:58:27,678 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-28 18:58:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:27,694 INFO L225 Difference]: With dead ends: 11129 [2020-10-28 18:58:27,694 INFO L226 Difference]: Without dead ends: 10927 [2020-10-28 18:58:27,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-28 18:58:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10927 states. [2020-10-28 18:58:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10927 to 4377. [2020-10-28 18:58:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4377 states. [2020-10-28 18:58:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 6315 transitions. [2020-10-28 18:58:28,599 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 6315 transitions. Word has length 61 [2020-10-28 18:58:28,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:28,599 INFO L481 AbstractCegarLoop]: Abstraction has 4377 states and 6315 transitions. [2020-10-28 18:58:28,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:58:28,600 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 6315 transitions. [2020-10-28 18:58:28,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:58:28,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:28,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:28,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:58:28,603 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:28,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1370519738, now seen corresponding path program 1 times [2020-10-28 18:58:28,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:28,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749002073] [2020-10-28 18:58:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:28,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:28,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:28,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:28,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:28,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:29,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:29,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:29,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:32,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:32,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:58:32,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:58:32,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4168 [2020-10-28 18:58:32,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:32,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:32,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:32,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 18:58:32,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 18:58:32,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:33,755 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:58:33,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:33,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:33,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:33,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:33,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:33,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:58:33,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:33,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:33,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:33,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:33,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:33,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:33,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749002073] [2020-10-28 18:58:33,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:33,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:33,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858099293] [2020-10-28 18:58:33,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:33,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:33,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:33,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:33,801 INFO L87 Difference]: Start difference. First operand 4377 states and 6315 transitions. Second operand 4 states. [2020-10-28 18:58:34,816 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 18:58:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:38,499 INFO L93 Difference]: Finished difference Result 10793 states and 15849 transitions. [2020-10-28 18:58:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:38,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:58:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:38,508 INFO L225 Difference]: With dead ends: 10793 [2020-10-28 18:58:38,509 INFO L226 Difference]: Without dead ends: 7298 [2020-10-28 18:58:38,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7298 states. [2020-10-28 18:58:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7298 to 7295. [2020-10-28 18:58:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7295 states. [2020-10-28 18:58:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7295 states to 7295 states and 10513 transitions. [2020-10-28 18:58:39,707 INFO L78 Accepts]: Start accepts. Automaton has 7295 states and 10513 transitions. Word has length 68 [2020-10-28 18:58:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:39,707 INFO L481 AbstractCegarLoop]: Abstraction has 7295 states and 10513 transitions. [2020-10-28 18:58:39,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 7295 states and 10513 transitions. [2020-10-28 18:58:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:58:39,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:39,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:39,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:58:39,713 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:39,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1860533232, now seen corresponding path program 1 times [2020-10-28 18:58:39,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:39,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236408214] [2020-10-28 18:58:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:39,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:39,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:39,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:39,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:40,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:40,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:41,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:41,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:58:41,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:58:41,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1923 [2020-10-28 18:58:41,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:41,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:41,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:41,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 18:58:41,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 18:58:41,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:42,678 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:58:42,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:42,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:42,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:42,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:42,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:42,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:58:42,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:42,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:42,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:42,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:42,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236408214] [2020-10-28 18:58:42,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:42,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:42,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720388302] [2020-10-28 18:58:42,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:42,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:42,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:42,716 INFO L87 Difference]: Start difference. First operand 7295 states and 10513 transitions. Second operand 4 states. [2020-10-28 18:58:43,673 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:58:48,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:48,699 INFO L93 Difference]: Finished difference Result 18945 states and 27610 transitions. [2020-10-28 18:58:48,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:48,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 18:58:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:48,713 INFO L225 Difference]: With dead ends: 18945 [2020-10-28 18:58:48,713 INFO L226 Difference]: Without dead ends: 12368 [2020-10-28 18:58:48,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12368 states. [2020-10-28 18:58:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12368 to 11545. [2020-10-28 18:58:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11545 states. [2020-10-28 18:58:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11545 states to 11545 states and 16679 transitions. [2020-10-28 18:58:50,749 INFO L78 Accepts]: Start accepts. Automaton has 11545 states and 16679 transitions. Word has length 69 [2020-10-28 18:58:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:50,749 INFO L481 AbstractCegarLoop]: Abstraction has 11545 states and 16679 transitions. [2020-10-28 18:58:50,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand 11545 states and 16679 transitions. [2020-10-28 18:58:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:58:50,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:50,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:50,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:58:50,753 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:50,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1592818096, now seen corresponding path program 1 times [2020-10-28 18:58:50,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:50,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445259630] [2020-10-28 18:58:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:50,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:50,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:50,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:51,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:51,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:51,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:51,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:51,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:51,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:52,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:52,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:58:52,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:58:52,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1472 [2020-10-28 18:58:52,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:52,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:58:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 18:58:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:58:52,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0