/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:36:27,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:36:27,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:36:27,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:36:27,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:36:27,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:36:27,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:36:27,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:36:27,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:36:27,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:36:27,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:36:27,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:36:27,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:36:27,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:36:27,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:36:27,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:36:27,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:36:27,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:36:27,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:36:27,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:36:27,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:36:27,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:36:27,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:36:27,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:36:27,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:36:27,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:36:27,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:36:27,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:36:27,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:36:27,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:36:27,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:36:27,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:36:27,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:36:27,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:36:27,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:36:27,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:36:27,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:36:27,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:36:27,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:36:27,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:36:27,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:36:27,363 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 [2020-10-29 13:36:27,389 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:36:27,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:36:27,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:36:27,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:36:27,392 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:36:27,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:36:27,392 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:36:27,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:36:27,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:36:27,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:36:27,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:36:27,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:36:27,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:36:27,394 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:36:27,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:36:27,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:36:27,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:36:27,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:36:27,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:36:27,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:36:27,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:36:27,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:36:27,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:36:27,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:36:27,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:36:27,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:36:27,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:36:27,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:36:27,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:36:27,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:36:27,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:36:27,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:36:27,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:36:27,800 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:36:27,808 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:36:27,809 INFO L432 ainManager$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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:36:27,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9095edd5/10f3fd3147e046438aaa62f765b7d956/FLAG5eb1c0fdf [2020-10-29 13:36:28,710 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:36:28,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:36:28,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9095edd5/10f3fd3147e046438aaa62f765b7d956/FLAG5eb1c0fdf [2020-10-29 13:36:29,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9095edd5/10f3fd3147e046438aaa62f765b7d956 [2020-10-29 13:36:29,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:36:29,036 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:36:29,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:36:29,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:36:29,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:36:29,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:36:29" (1/1) ... [2020-10-29 13:36:29,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc505c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:29, skipping insertion in model container [2020-10-29 13:36:29,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:36:29" (1/1) ... [2020-10-29 13:36:29,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:36:29,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:36:29,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:36:29,419 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:36:29,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:36:29,592 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:36:29,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:29 WrapperNode [2020-10-29 13:36:29,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:36:29,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:36:29,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:36:29,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:36:29,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:29" (1/1) ... [2020-10-29 13:36:29,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:29" (1/1) ... [2020-10-29 13:36:29,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:29" (1/1) ... [2020-10-29 13:36:29,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:29" (1/1) ... [2020-10-29 13:36:29,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:29" (1/1) ... [2020-10-29 13:36:29,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:29" (1/1) ... [2020-10-29 13:36:29,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:29" (1/1) ... [2020-10-29 13:36:29,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:36:29,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:36:29,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:36:29,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:36:29,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:29" (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 [2020-10-29 13:36:29,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:36:29,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:36:29,817 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:36:29,817 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:36:29,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:36:29,818 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:36:29,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:36:29,819 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:36:29,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:36:29,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:36:29,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:36:29,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:36:29,821 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:36:29,821 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:36:29,821 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:36:29,822 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:36:29,822 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:36:29,823 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:36:29,823 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:36:29,823 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:36:29,823 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:36:29,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:36:29,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:36:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:36:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:36:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:36:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:36:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:36:30,680 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:36:30,680 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:36:30,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:36:30 BoogieIcfgContainer [2020-10-29 13:36:30,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:36:30,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:36:30,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:36:30,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:36:30,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:36:29" (1/3) ... [2020-10-29 13:36:30,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56633a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:36:30, skipping insertion in model container [2020-10-29 13:36:30,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:29" (2/3) ... [2020-10-29 13:36:30,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56633a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:36:30, skipping insertion in model container [2020-10-29 13:36:30,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:36:30" (3/3) ... [2020-10-29 13:36:30,692 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:36:30,705 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:36:30,710 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:36:30,725 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:36:30,755 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:36:30,755 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:36:30,755 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:36:30,756 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:36:30,756 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:36:30,756 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:36:30,756 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:36:30,756 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:36:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-10-29 13:36:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 13:36:30,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:30,787 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] [2020-10-29 13:36:30,788 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:30,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash -734565587, now seen corresponding path program 1 times [2020-10-29 13:36:30,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:30,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794851012] [2020-10-29 13:36:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:31,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:31,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:32,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:32,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 13:36:32,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:36:32,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1684 [2020-10-29 13:36:32,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:32,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:36:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:36:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:36:32,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:36:33,033 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:36:33,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:33,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:33,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:33,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:33,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-29 13:36:33,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:33,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:33,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:33,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:33,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:33,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 13:36:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:33,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794851012] [2020-10-29 13:36:33,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:33,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:36:33,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604065231] [2020-10-29 13:36:33,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:36:33,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:33,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:36:33,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:36:33,222 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 6 states. [2020-10-29 13:36:33,496 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:36:34,260 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:36:34,461 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:36:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:34,496 INFO L93 Difference]: Finished difference Result 372 states and 579 transitions. [2020-10-29 13:36:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:36:34,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-29 13:36:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:34,514 INFO L225 Difference]: With dead ends: 372 [2020-10-29 13:36:34,514 INFO L226 Difference]: Without dead ends: 284 [2020-10-29 13:36:34,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:36:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-29 13:36:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 151. [2020-10-29 13:36:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-29 13:36:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 224 transitions. [2020-10-29 13:36:34,611 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 224 transitions. Word has length 43 [2020-10-29 13:36:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:34,611 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 224 transitions. [2020-10-29 13:36:34,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:36:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 224 transitions. [2020-10-29 13:36:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 13:36:34,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:34,622 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] [2020-10-29 13:36:34,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:36:34,622 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1871397161, now seen corresponding path program 1 times [2020-10-29 13:36:34,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:34,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644389040] [2020-10-29 13:36:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:34,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:34,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:35,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:35,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 13:36:35,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:36:35,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-29 13:36:35,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:35,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:35,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:36:35,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:36:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:36:35,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:35,460 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:36:35,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:35,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:35,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:35,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:35,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:35,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:36:35,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:35,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:35,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:36:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:35,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644389040] [2020-10-29 13:36:35,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:35,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:36:35,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004820414] [2020-10-29 13:36:35,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:36:35,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:35,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:36:35,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:36:35,515 INFO L87 Difference]: Start difference. First operand 151 states and 224 transitions. Second operand 4 states. [2020-10-29 13:36:35,711 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:36:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:36,141 INFO L93 Difference]: Finished difference Result 373 states and 572 transitions. [2020-10-29 13:36:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:36:36,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-29 13:36:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:36,150 INFO L225 Difference]: With dead ends: 373 [2020-10-29 13:36:36,150 INFO L226 Difference]: Without dead ends: 246 [2020-10-29 13:36:36,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:36:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-29 13:36:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-29 13:36:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-29 13:36:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 368 transitions. [2020-10-29 13:36:36,184 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 368 transitions. Word has length 44 [2020-10-29 13:36:36,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:36,184 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 368 transitions. [2020-10-29 13:36:36,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:36:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 368 transitions. [2020-10-29 13:36:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:36:36,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:36,187 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] [2020-10-29 13:36:36,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:36:36,187 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:36,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1535400688, now seen corresponding path program 1 times [2020-10-29 13:36:36,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:36,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215592808] [2020-10-29 13:36:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:36,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:36,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:36,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:36,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:36:36,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:36:36,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-29 13:36:36,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:36,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:36:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:36:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:36:36,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:36,676 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:36:36,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:36,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:36,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:36,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:36,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:36,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:36:36,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:36,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:36,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:36,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:36,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:36,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:36,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215592808] [2020-10-29 13:36:36,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:36,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:36:36,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953078649] [2020-10-29 13:36:36,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:36:36,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:36,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:36:36,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:36:36,710 INFO L87 Difference]: Start difference. First operand 243 states and 368 transitions. Second operand 4 states. [2020-10-29 13:36:36,916 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:36:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:37,412 INFO L93 Difference]: Finished difference Result 617 states and 952 transitions. [2020-10-29 13:36:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:36:37,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-29 13:36:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:37,417 INFO L225 Difference]: With dead ends: 617 [2020-10-29 13:36:37,417 INFO L226 Difference]: Without dead ends: 398 [2020-10-29 13:36:37,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:36:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-29 13:36:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 395. [2020-10-29 13:36:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-29 13:36:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 602 transitions. [2020-10-29 13:36:37,506 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 602 transitions. Word has length 45 [2020-10-29 13:36:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:37,508 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 602 transitions. [2020-10-29 13:36:37,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:36:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 602 transitions. [2020-10-29 13:36:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 13:36:37,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:37,511 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] [2020-10-29 13:36:37,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:36:37,514 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:37,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1127369728, now seen corresponding path program 1 times [2020-10-29 13:36:37,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:37,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113383136] [2020-10-29 13:36:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:37,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:37,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:38,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:38,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 13:36:38,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:36:38,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-29 13:36:38,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:38,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:38,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:36:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:36:38,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:36:38,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 13:36:38,349 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:36:38,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:38,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:38,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:38,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:38,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:38,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:36:38,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:38,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:38,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:38,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:38,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:38,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:36:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:38,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113383136] [2020-10-29 13:36:38,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:38,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:36:38,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861376640] [2020-10-29 13:36:38,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:36:38,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:38,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:36:38,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:36:38,400 INFO L87 Difference]: Start difference. First operand 395 states and 602 transitions. Second operand 6 states. [2020-10-29 13:36:39,064 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:36:39,280 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:36:39,474 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:36:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:39,925 INFO L93 Difference]: Finished difference Result 1356 states and 2088 transitions. [2020-10-29 13:36:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:36:39,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-29 13:36:39,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:39,935 INFO L225 Difference]: With dead ends: 1356 [2020-10-29 13:36:39,935 INFO L226 Difference]: Without dead ends: 985 [2020-10-29 13:36:39,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:36:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2020-10-29 13:36:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 979. [2020-10-29 13:36:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 979 states. [2020-10-29 13:36:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1498 transitions. [2020-10-29 13:36:40,035 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1498 transitions. Word has length 46 [2020-10-29 13:36:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:40,035 INFO L481 AbstractCegarLoop]: Abstraction has 979 states and 1498 transitions. [2020-10-29 13:36:40,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:36:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1498 transitions. [2020-10-29 13:36:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 13:36:40,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:40,038 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] [2020-10-29 13:36:40,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:36:40,038 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:40,039 INFO L82 PathProgramCache]: Analyzing trace with hash -739400431, now seen corresponding path program 1 times [2020-10-29 13:36:40,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:40,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906023273] [2020-10-29 13:36:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:40,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:40,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:40,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:40,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 13:36:40,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:36:40,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-29 13:36:40,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:40,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:36:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:36:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 13:36:40,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:36:40,518 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:36:40,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:40,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:40,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:40,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:40,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:40,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:36:40,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:40,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:40,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:40,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:40,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906023273] [2020-10-29 13:36:40,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:40,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:36:40,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836654883] [2020-10-29 13:36:40,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:36:40,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:40,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:36:40,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:36:40,560 INFO L87 Difference]: Start difference. First operand 979 states and 1498 transitions. Second operand 4 states. [2020-10-29 13:36:40,769 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:36:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:41,424 INFO L93 Difference]: Finished difference Result 2497 states and 3814 transitions. [2020-10-29 13:36:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:36:41,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-29 13:36:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:41,437 INFO L225 Difference]: With dead ends: 2497 [2020-10-29 13:36:41,437 INFO L226 Difference]: Without dead ends: 1542 [2020-10-29 13:36:41,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:36:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-10-29 13:36:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1539. [2020-10-29 13:36:41,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1539 states. [2020-10-29 13:36:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 2314 transitions. [2020-10-29 13:36:41,566 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 2314 transitions. Word has length 47 [2020-10-29 13:36:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:41,566 INFO L481 AbstractCegarLoop]: Abstraction has 1539 states and 2314 transitions. [2020-10-29 13:36:41,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:36:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 2314 transitions. [2020-10-29 13:36:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 13:36:41,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:41,577 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] [2020-10-29 13:36:41,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:36:41,578 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:41,579 INFO L82 PathProgramCache]: Analyzing trace with hash 643385751, now seen corresponding path program 1 times [2020-10-29 13:36:41,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:41,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351005054] [2020-10-29 13:36:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:41,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:41,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:42,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:42,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 13:36:42,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:36:42,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-29 13:36:42,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:42,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:36:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:36:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:36:42,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:36:42,357 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:36:42,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:42,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:42,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:42,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:42,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:42,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-29 13:36:42,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:42,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:42,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:36:42,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:36:42,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:36:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:42,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351005054] [2020-10-29 13:36:42,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:42,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:36:42,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945278329] [2020-10-29 13:36:42,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:36:42,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:42,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:36:42,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:36:42,443 INFO L87 Difference]: Start difference. First operand 1539 states and 2314 transitions. Second operand 6 states. [2020-10-29 13:36:42,772 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:36:43,425 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:36:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:43,644 INFO L93 Difference]: Finished difference Result 4529 states and 6814 transitions. [2020-10-29 13:36:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:36:43,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-10-29 13:36:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:43,661 INFO L225 Difference]: With dead ends: 4529 [2020-10-29 13:36:43,662 INFO L226 Difference]: Without dead ends: 3014 [2020-10-29 13:36:43,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:36:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2020-10-29 13:36:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 3011. [2020-10-29 13:36:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3011 states. [2020-10-29 13:36:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 4482 transitions. [2020-10-29 13:36:43,917 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 4482 transitions. Word has length 48 [2020-10-29 13:36:43,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:43,917 INFO L481 AbstractCegarLoop]: Abstraction has 3011 states and 4482 transitions. [2020-10-29 13:36:43,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:36:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 4482 transitions. [2020-10-29 13:36:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 13:36:43,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:43,918 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] [2020-10-29 13:36:43,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:36:43,919 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:43,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:43,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1166417682, now seen corresponding path program 1 times [2020-10-29 13:36:43,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:43,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363656285] [2020-10-29 13:36:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:43,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:44,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:44,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 13:36:44,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:44,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-29 13:36:44,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:44,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:44,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:36:44,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-29 13:36:44,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:36:44,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:44,290 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:36:44,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:44,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:44,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:44,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:44,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:44,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:36:44,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:44,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:44,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:44,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363656285] [2020-10-29 13:36:44,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:44,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:36:44,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117758446] [2020-10-29 13:36:44,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:36:44,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:44,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:36:44,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:36:44,322 INFO L87 Difference]: Start difference. First operand 3011 states and 4482 transitions. Second operand 5 states. [2020-10-29 13:36:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:45,284 INFO L93 Difference]: Finished difference Result 6190 states and 9132 transitions. [2020-10-29 13:36:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:36:45,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-10-29 13:36:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:45,318 INFO L225 Difference]: With dead ends: 6190 [2020-10-29 13:36:45,318 INFO L226 Difference]: Without dead ends: 6187 [2020-10-29 13:36:45,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:36:45,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6187 states. [2020-10-29 13:36:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6187 to 3203. [2020-10-29 13:36:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3203 states. [2020-10-29 13:36:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4674 transitions. [2020-10-29 13:36:45,684 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4674 transitions. Word has length 48 [2020-10-29 13:36:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:45,684 INFO L481 AbstractCegarLoop]: Abstraction has 3203 states and 4674 transitions. [2020-10-29 13:36:45,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:36:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4674 transitions. [2020-10-29 13:36:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 13:36:45,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:45,685 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] [2020-10-29 13:36:45,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:36:45,686 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:45,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:45,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2097236675, now seen corresponding path program 1 times [2020-10-29 13:36:45,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:45,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886468498] [2020-10-29 13:36:45,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:45,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:45,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:45,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 13:36:45,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:45,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-29 13:36:45,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:45,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:45,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:36:45,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:36:45,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:36:45,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:46,012 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:36:46,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:46,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:46,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:46,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:46,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:46,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:36:46,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:46,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:46,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:46,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:46,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:46,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:46,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886468498] [2020-10-29 13:36:46,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:46,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:36:46,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357374350] [2020-10-29 13:36:46,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:36:46,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:46,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:36:46,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:36:46,048 INFO L87 Difference]: Start difference. First operand 3203 states and 4674 transitions. Second operand 4 states. [2020-10-29 13:36:46,216 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:36:46,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:46,884 INFO L93 Difference]: Finished difference Result 7095 states and 10340 transitions. [2020-10-29 13:36:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:36:46,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-29 13:36:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:46,906 INFO L225 Difference]: With dead ends: 7095 [2020-10-29 13:36:46,906 INFO L226 Difference]: Without dead ends: 3916 [2020-10-29 13:36:46,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:36:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2020-10-29 13:36:47,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3893. [2020-10-29 13:36:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3893 states. [2020-10-29 13:36:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 5628 transitions. [2020-10-29 13:36:47,255 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 5628 transitions. Word has length 49 [2020-10-29 13:36:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:47,256 INFO L481 AbstractCegarLoop]: Abstraction has 3893 states and 5628 transitions. [2020-10-29 13:36:47,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:36:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 5628 transitions. [2020-10-29 13:36:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:36:47,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:47,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:36:47,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:36:47,261 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:47,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1288443405, now seen corresponding path program 1 times [2020-10-29 13:36:47,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:47,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435109185] [2020-10-29 13:36:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:47,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:47,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:47,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:49,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:49,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:36:49,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:36:49,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2308 [2020-10-29 13:36:49,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:49,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:36:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:36:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:36:49,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:49,886 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:36:49,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:49,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:49,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:49,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:49,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:49,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:36:49,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:49,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:49,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:49,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:49,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:49,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:36:49,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435109185] [2020-10-29 13:36:49,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:36:49,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:36:49,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320947164] [2020-10-29 13:36:49,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:36:49,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:49,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:36:49,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:36:49,938 INFO L87 Difference]: Start difference. First operand 3893 states and 5628 transitions. Second operand 5 states. [2020-10-29 13:36:50,170 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:36:50,960 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:36:51,141 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:36:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:51,666 INFO L93 Difference]: Finished difference Result 9754 states and 14126 transitions. [2020-10-29 13:36:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:36:51,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 13:36:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:51,703 INFO L225 Difference]: With dead ends: 9754 [2020-10-29 13:36:51,704 INFO L226 Difference]: Without dead ends: 6575 [2020-10-29 13:36:51,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:36:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2020-10-29 13:36:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 6525. [2020-10-29 13:36:52,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6525 states. [2020-10-29 13:36:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 9296 transitions. [2020-10-29 13:36:52,417 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 9296 transitions. Word has length 68 [2020-10-29 13:36:52,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:52,418 INFO L481 AbstractCegarLoop]: Abstraction has 6525 states and 9296 transitions. [2020-10-29 13:36:52,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:36:52,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 9296 transitions. [2020-10-29 13:36:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:36:52,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:52,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:36:52,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:36:52,422 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1643761902, now seen corresponding path program 1 times [2020-10-29 13:36:52,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:52,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579439573] [2020-10-29 13:36:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:52,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:52,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:52,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:52,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:52,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:53,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:56,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:57,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:57,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:36:57,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:36:57,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:36:57,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:57,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:57,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:36:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:36:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:36:57,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:57,700 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:36:57,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:57,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:57,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:57,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:57,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:57,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:36:57,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:57,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:57,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:57,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:36:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:57,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579439573] [2020-10-29 13:36:57,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:57,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:36:57,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062269882] [2020-10-29 13:36:57,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:36:57,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:57,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:36:57,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:36:57,769 INFO L87 Difference]: Start difference. First operand 6525 states and 9296 transitions. Second operand 6 states. [2020-10-29 13:36:58,679 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:36:58,847 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:36:59,019 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:36:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:59,595 INFO L93 Difference]: Finished difference Result 15351 states and 21880 transitions. [2020-10-29 13:36:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:36:59,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-29 13:36:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:59,642 INFO L225 Difference]: With dead ends: 15351 [2020-10-29 13:36:59,643 INFO L226 Difference]: Without dead ends: 10564 [2020-10-29 13:36:59,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:36:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10564 states. [2020-10-29 13:37:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10564 to 10558. [2020-10-29 13:37:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10558 states. [2020-10-29 13:37:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10558 states to 10558 states and 14862 transitions. [2020-10-29 13:37:00,650 INFO L78 Accepts]: Start accepts. Automaton has 10558 states and 14862 transitions. Word has length 68 [2020-10-29 13:37:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:00,651 INFO L481 AbstractCegarLoop]: Abstraction has 10558 states and 14862 transitions. [2020-10-29 13:37:00,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 10558 states and 14862 transitions. [2020-10-29 13:37:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:37:00,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:00,656 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:00,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:37:00,657 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:00,658 INFO L82 PathProgramCache]: Analyzing trace with hash -517063931, now seen corresponding path program 1 times [2020-10-29 13:37:00,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:00,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243616774] [2020-10-29 13:37:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:00,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:00,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:00,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:01,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:01,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:05,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:05,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:37:05,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:37:05,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:37:05,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:05,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:05,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:05,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:37:05,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:37:05,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:05,919 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:37:05,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:05,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:05,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:05,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:05,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:05,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:37:05,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:05,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:05,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:05,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:05,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:05,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:05,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243616774] [2020-10-29 13:37:05,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:05,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:37:05,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515087713] [2020-10-29 13:37:05,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:05,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:05,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:05,972 INFO L87 Difference]: Start difference. First operand 10558 states and 14862 transitions. Second operand 6 states. [2020-10-29 13:37:06,230 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:37:07,641 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:37:07,869 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:37:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:11,450 INFO L93 Difference]: Finished difference Result 62310 states and 86518 transitions. [2020-10-29 13:37:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:37:11,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-29 13:37:11,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:11,606 INFO L225 Difference]: With dead ends: 62310 [2020-10-29 13:37:11,607 INFO L226 Difference]: Without dead ends: 51779 [2020-10-29 13:37:11,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:37:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51779 states. [2020-10-29 13:37:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51779 to 38022. [2020-10-29 13:37:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38022 states. [2020-10-29 13:37:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38022 states to 38022 states and 52796 transitions. [2020-10-29 13:37:15,041 INFO L78 Accepts]: Start accepts. Automaton has 38022 states and 52796 transitions. Word has length 68 [2020-10-29 13:37:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:15,041 INFO L481 AbstractCegarLoop]: Abstraction has 38022 states and 52796 transitions. [2020-10-29 13:37:15,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 38022 states and 52796 transitions. [2020-10-29 13:37:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:37:15,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:15,052 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:15,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:37:15,052 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:15,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1570894492, now seen corresponding path program 1 times [2020-10-29 13:37:15,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:15,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048784267] [2020-10-29 13:37:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:15,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:15,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:15,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:15,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:15,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:15,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:15,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:16,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:19,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:20,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:20,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:37:20,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:37:20,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:37:20,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:20,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:20,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:20,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:37:20,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:37:20,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:20,291 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:37:20,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:20,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:20,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:20,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:20,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:37:20,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:20,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:20,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 13:37:20,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048784267] [2020-10-29 13:37:20,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:20,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:37:20,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298065642] [2020-10-29 13:37:20,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:20,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:20,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:20,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:20,331 INFO L87 Difference]: Start difference. First operand 38022 states and 52796 transitions. Second operand 6 states. [2020-10-29 13:37:20,548 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:37:21,298 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:37:24,088 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:24,289 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:37:26,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:26,042 INFO L93 Difference]: Finished difference Result 92113 states and 129538 transitions. [2020-10-29 13:37:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:37:26,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-29 13:37:26,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:26,225 INFO L225 Difference]: With dead ends: 92113 [2020-10-29 13:37:26,225 INFO L226 Difference]: Without dead ends: 73278 [2020-10-29 13:37:26,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:37:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73278 states. [2020-10-29 13:37:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73278 to 62914. [2020-10-29 13:37:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62914 states. [2020-10-29 13:37:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62914 states to 62914 states and 87266 transitions. [2020-10-29 13:37:31,246 INFO L78 Accepts]: Start accepts. Automaton has 62914 states and 87266 transitions. Word has length 68 [2020-10-29 13:37:31,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:31,246 INFO L481 AbstractCegarLoop]: Abstraction has 62914 states and 87266 transitions. [2020-10-29 13:37:31,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 62914 states and 87266 transitions. [2020-10-29 13:37:31,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:37:31,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:31,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:31,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:37:31,256 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:31,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:31,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1020108758, now seen corresponding path program 1 times [2020-10-29 13:37:31,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:31,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055164228] [2020-10-29 13:37:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:31,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:32,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:33,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:34,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:36,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:36,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:37:36,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:37:36,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:37:36,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:36,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:36,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:36,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:37:36,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:37:36,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:36,490 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:37:36,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:36,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:36,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:36,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:36,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:36,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:37:36,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:36,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:36,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:36,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:36,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:36,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 13:37:36,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055164228] [2020-10-29 13:37:36,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:36,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:37:36,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589908022] [2020-10-29 13:37:36,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:36,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:36,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:36,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:36,531 INFO L87 Difference]: Start difference. First operand 62914 states and 87266 transitions. Second operand 6 states. [2020-10-29 13:37:36,739 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:37:37,648 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:37:40,072 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:40,375 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:37:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:42,390 INFO L93 Difference]: Finished difference Result 109336 states and 151648 transitions. [2020-10-29 13:37:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:37:42,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-29 13:37:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:42,517 INFO L225 Difference]: With dead ends: 109336 [2020-10-29 13:37:42,518 INFO L226 Difference]: Without dead ends: 76629 [2020-10-29 13:37:42,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:37:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76629 states. [2020-10-29 13:37:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76629 to 63534. [2020-10-29 13:37:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63534 states. [2020-10-29 13:37:47,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63534 states to 63534 states and 87806 transitions. [2020-10-29 13:37:47,278 INFO L78 Accepts]: Start accepts. Automaton has 63534 states and 87806 transitions. Word has length 68 [2020-10-29 13:37:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:47,278 INFO L481 AbstractCegarLoop]: Abstraction has 63534 states and 87806 transitions. [2020-10-29 13:37:47,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 63534 states and 87806 transitions. [2020-10-29 13:37:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:37:47,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:47,287 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:47,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:37:47,288 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:47,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:47,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1247391026, now seen corresponding path program 1 times [2020-10-29 13:37:47,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:47,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397963092] [2020-10-29 13:37:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:47,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:47,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:47,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:47,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:48,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:48,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:48,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:52,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:52,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:37:52,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:37:52,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:37:52,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:52,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:52,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:52,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:37:52,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:37:52,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:52,526 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:37:52,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:52,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:52,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:52,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:52,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:52,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:37:52,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:52,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:52,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:52,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:52,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:52,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:37:52,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397963092] [2020-10-29 13:37:52,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:52,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:37:52,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907116387] [2020-10-29 13:37:52,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:52,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:52,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:52,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:52,561 INFO L87 Difference]: Start difference. First operand 63534 states and 87806 transitions. Second operand 6 states. [2020-10-29 13:37:52,781 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:37:53,718 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:37:56,315 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:56,495 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:37:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:58,457 INFO L93 Difference]: Finished difference Result 88906 states and 123024 transitions. [2020-10-29 13:37:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:37:58,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-29 13:37:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:58,575 INFO L225 Difference]: With dead ends: 88906 [2020-10-29 13:37:58,575 INFO L226 Difference]: Without dead ends: 77103 [2020-10-29 13:37:58,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:37:58,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77103 states. [2020-10-29 13:38:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77103 to 68246. [2020-10-29 13:38:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68246 states. [2020-10-29 13:38:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68246 states to 68246 states and 94260 transitions. [2020-10-29 13:38:03,674 INFO L78 Accepts]: Start accepts. Automaton has 68246 states and 94260 transitions. Word has length 69 [2020-10-29 13:38:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:03,674 INFO L481 AbstractCegarLoop]: Abstraction has 68246 states and 94260 transitions. [2020-10-29 13:38:03,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 68246 states and 94260 transitions. [2020-10-29 13:38:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:38:03,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:03,852 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:03,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:38:03,852 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:03,853 INFO L82 PathProgramCache]: Analyzing trace with hash 986249442, now seen corresponding path program 1 times [2020-10-29 13:38:03,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:03,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500528823] [2020-10-29 13:38:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:03,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:03,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:03,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:04,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:04,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:04,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:04,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:04,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:05,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:05,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:08,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:08,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:38:08,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:38:08,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:38:08,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:08,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:08,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:38:08,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:38:08,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:38:08,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:09,224 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:38:09,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:09,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:09,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:09,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:09,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:09,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:38:09,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:09,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:09,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:09,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:09,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:38:09,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:09,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500528823] [2020-10-29 13:38:09,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:38:09,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:38:09,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168953088] [2020-10-29 13:38:09,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:38:09,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:09,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:38:09,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:38:09,291 INFO L87 Difference]: Start difference. First operand 68246 states and 94260 transitions. Second operand 8 states. [2020-10-29 13:38:09,519 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:38:10,987 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:38:11,251 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:38:21,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:21,985 INFO L93 Difference]: Finished difference Result 211431 states and 290316 transitions. [2020-10-29 13:38:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:38:21,985 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-29 13:38:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:22,351 INFO L225 Difference]: With dead ends: 211431 [2020-10-29 13:38:22,351 INFO L226 Difference]: Without dead ends: 143212 [2020-10-29 13:38:22,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:38:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143212 states. [2020-10-29 13:38:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143212 to 79936. [2020-10-29 13:38:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79936 states. [2020-10-29 13:38:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79936 states to 79936 states and 109100 transitions. [2020-10-29 13:38:29,621 INFO L78 Accepts]: Start accepts. Automaton has 79936 states and 109100 transitions. Word has length 71 [2020-10-29 13:38:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:29,621 INFO L481 AbstractCegarLoop]: Abstraction has 79936 states and 109100 transitions. [2020-10-29 13:38:29,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:38:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 79936 states and 109100 transitions. [2020-10-29 13:38:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:38:29,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:29,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:29,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:38:29,629 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash -886503239, now seen corresponding path program 1 times [2020-10-29 13:38:29,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:29,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123492231] [2020-10-29 13:38:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:29,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:29,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:29,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:29,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:29,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:33,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:33,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:38:33,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:38:33,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3966 [2020-10-29 13:38:33,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:33,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:33,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:38:33,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:38:33,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:38:33,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:33,919 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:38:33,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:33,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:33,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:33,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:33,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:33,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:38:33,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:33,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:38:33,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:33,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123492231] [2020-10-29 13:38:33,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:38:33,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:38:33,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076210600] [2020-10-29 13:38:33,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:38:33,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:33,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:38:33,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:38:33,979 INFO L87 Difference]: Start difference. First operand 79936 states and 109100 transitions. Second operand 8 states. [2020-10-29 13:38:34,197 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:38:35,831 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:38:36,356 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:38:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:50,621 INFO L93 Difference]: Finished difference Result 243329 states and 331777 transitions. [2020-10-29 13:38:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:38:50,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-29 13:38:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:50,998 INFO L225 Difference]: With dead ends: 243329 [2020-10-29 13:38:50,998 INFO L226 Difference]: Without dead ends: 163420 [2020-10-29 13:38:51,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:38:51,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163420 states. [2020-10-29 13:39:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163420 to 95378. [2020-10-29 13:39:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95378 states. [2020-10-29 13:39:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95378 states to 95378 states and 128501 transitions. [2020-10-29 13:39:00,700 INFO L78 Accepts]: Start accepts. Automaton has 95378 states and 128501 transitions. Word has length 72 [2020-10-29 13:39:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:00,700 INFO L481 AbstractCegarLoop]: Abstraction has 95378 states and 128501 transitions. [2020-10-29 13:39:00,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:39:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 95378 states and 128501 transitions. [2020-10-29 13:39:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:39:00,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:00,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:00,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:39:00,711 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:00,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:00,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1261275325, now seen corresponding path program 1 times [2020-10-29 13:39:00,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:00,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810030108] [2020-10-29 13:39:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:00,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:00,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:00,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:00,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:01,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:01,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:01,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:01,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:01,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:05,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:05,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:39:05,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:39:05,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4360 [2020-10-29 13:39:05,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:05,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:05,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:39:05,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:39:05,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:39:05,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:05,317 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:39:05,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:05,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:05,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:05,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:05,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:05,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:39:05,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:05,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:05,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:05,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:05,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:05,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:05,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810030108] [2020-10-29 13:39:05,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:39:05,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:39:05,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33639184] [2020-10-29 13:39:05,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:05,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:05,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:05,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:05,342 INFO L87 Difference]: Start difference. First operand 95378 states and 128501 transitions. Second operand 8 states. [2020-10-29 13:39:05,544 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:39:07,243 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:39:07,547 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:39:07,903 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:39:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:22,325 INFO L93 Difference]: Finished difference Result 246263 states and 329991 transitions. [2020-10-29 13:39:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 13:39:22,326 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-29 13:39:22,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:22,636 INFO L225 Difference]: With dead ends: 246263 [2020-10-29 13:39:22,636 INFO L226 Difference]: Without dead ends: 150912 [2020-10-29 13:39:22,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:39:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150912 states. [2020-10-29 13:39:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150912 to 110418. [2020-10-29 13:39:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110418 states. [2020-10-29 13:39:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110418 states to 110418 states and 148067 transitions. [2020-10-29 13:39:34,425 INFO L78 Accepts]: Start accepts. Automaton has 110418 states and 148067 transitions. Word has length 72 [2020-10-29 13:39:34,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:34,426 INFO L481 AbstractCegarLoop]: Abstraction has 110418 states and 148067 transitions. [2020-10-29 13:39:34,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:39:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 110418 states and 148067 transitions. [2020-10-29 13:39:34,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:39:34,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:34,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:34,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:39:34,435 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:34,436 INFO L82 PathProgramCache]: Analyzing trace with hash -847661711, now seen corresponding path program 1 times [2020-10-29 13:39:34,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:34,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363431661] [2020-10-29 13:39:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:34,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:34,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:34,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:34,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:35,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:35,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:35,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:35,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:35,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:35,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:37,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:37,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:38,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:39,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:39,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:39:39,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:39:39,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:39:39,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:39,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:39:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:39:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:39:39,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:39,774 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:39:39,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:39,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:39,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:39,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:39,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:39,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:39:39,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:39,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:39,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:39,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:39,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:39:39,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:39,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363431661] [2020-10-29 13:39:39,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:39:39,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:39:39,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455302008] [2020-10-29 13:39:39,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:39,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:39,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:39,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:39,819 INFO L87 Difference]: Start difference. First operand 110418 states and 148067 transitions. Second operand 8 states. [2020-10-29 13:39:40,037 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:39:41,392 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:39:41,750 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:39:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:56,855 INFO L93 Difference]: Finished difference Result 243975 states and 327358 transitions. [2020-10-29 13:39:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:39:56,856 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-29 13:39:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:57,087 INFO L225 Difference]: With dead ends: 243975 [2020-10-29 13:39:57,087 INFO L226 Difference]: Without dead ends: 146753 [2020-10-29 13:39:57,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:39:57,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146753 states.