/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=DEEPEST --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_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:25:58,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:25:58,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:25:58,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:25:58,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:25:58,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:25:58,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:25:58,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:25:58,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:25:58,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:25:58,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:25:58,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:25:58,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:25:58,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:25:58,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:25:58,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:25:58,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:25:58,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:25:58,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:25:58,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:25:58,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:25:58,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:25:58,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:25:58,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:25:58,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:25:58,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:25:58,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:25:58,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:25:58,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:25:58,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:25:58,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:25:58,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:25:58,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:25:58,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:25:58,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:25:58,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:25:58,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:25:58,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:25:58,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:25:58,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:25:58,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:25:58,697 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:25:58,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:25:58,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:25:58,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:25:58,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:25:58,751 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:25:58,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:25:58,751 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:25:58,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:25:58,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:25:58,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:25:58,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:25:58,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:25:58,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:25:58,754 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:25:58,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:25:58,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:25:58,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:25:58,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:25:58,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:25:58,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:25:58,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:25:58,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:25:58,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:25:58,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:25:58,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:25:58,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:25:58,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:25:58,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:25:58,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:25:58,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:25:59,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:25:59,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:25:59,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:25:59,251 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:25:59,251 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:25:59,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 00:25:59,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17ddf5661/7b64f0f60a384ef992e1278e1dc5d572/FLAGbf52295cf [2020-10-28 00:26:00,063 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:26:00,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 00:26:00,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17ddf5661/7b64f0f60a384ef992e1278e1dc5d572/FLAGbf52295cf [2020-10-28 00:26:00,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17ddf5661/7b64f0f60a384ef992e1278e1dc5d572 [2020-10-28 00:26:00,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:26:00,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:26:00,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:26:00,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:26:00,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:26:00,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:26:00" (1/1) ... [2020-10-28 00:26:00,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4623ecad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:00, skipping insertion in model container [2020-10-28 00:26:00,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:26:00" (1/1) ... [2020-10-28 00:26:00,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:26:00,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:26:00,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:26:00,907 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:26:01,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:26:01,109 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:26:01,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:01 WrapperNode [2020-10-28 00:26:01,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:26:01,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:26:01,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:26:01,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:26:01,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:01" (1/1) ... [2020-10-28 00:26:01,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:01" (1/1) ... [2020-10-28 00:26:01,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:01" (1/1) ... [2020-10-28 00:26:01,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:01" (1/1) ... [2020-10-28 00:26:01,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:01" (1/1) ... [2020-10-28 00:26:01,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:01" (1/1) ... [2020-10-28 00:26:01,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:01" (1/1) ... [2020-10-28 00:26:01,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:26:01,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:26:01,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:26:01,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:26:01,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:26:01,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:26:01,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:26:01,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:26:01,303 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:26:01,303 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:26:01,304 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:26:01,304 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:26:01,304 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:26:01,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:26:01,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:26:01,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:26:01,305 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:26:01,305 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:26:01,305 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:26:01,305 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:26:01,306 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:26:01,306 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:26:01,306 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:26:01,306 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:26:01,306 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:26:01,306 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:26:01,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:26:01,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:26:01,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:26:01,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:26:01,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:26:01,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:26:02,373 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:26:02,373 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:26:02,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:26:02 BoogieIcfgContainer [2020-10-28 00:26:02,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:26:02,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:26:02,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:26:02,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:26:02,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:26:00" (1/3) ... [2020-10-28 00:26:02,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27227a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:26:02, skipping insertion in model container [2020-10-28 00:26:02,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:01" (2/3) ... [2020-10-28 00:26:02,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27227a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:26:02, skipping insertion in model container [2020-10-28 00:26:02,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:26:02" (3/3) ... [2020-10-28 00:26:02,385 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 00:26:02,398 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:26:02,403 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:26:02,423 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:26:02,454 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:26:02,454 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:26:02,454 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:26:02,454 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:26:02,454 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:26:02,455 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:26:02,455 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:26:02,455 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:26:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states. [2020-10-28 00:26:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:26:02,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:02,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:26:02,494 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:02,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1947414102, now seen corresponding path program 1 times [2020-10-28 00:26:02,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:02,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962171920] [2020-10-28 00:26:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:03,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:03,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:03,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:03,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:03,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:03,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:04,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:06,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:06,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:06,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:07,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:07,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:26:07,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:26:07,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 00:26:07,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:07,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:07,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:26:07,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:26:07,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:26:08,434 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:26:08,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:08,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:08,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:08,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:08,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:08,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:26:08,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:08,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:08,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:08,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:08,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:26:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:08,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962171920] [2020-10-28 00:26:08,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:08,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:08,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622337775] [2020-10-28 00:26:08,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:08,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:08,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:08,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:08,580 INFO L87 Difference]: Start difference. First operand 250 states. Second operand 4 states. [2020-10-28 00:26:08,981 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:26:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:10,453 INFO L93 Difference]: Finished difference Result 495 states and 846 transitions. [2020-10-28 00:26:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:10,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 00:26:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:10,486 INFO L225 Difference]: With dead ends: 495 [2020-10-28 00:26:10,486 INFO L226 Difference]: Without dead ends: 364 [2020-10-28 00:26:10,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-28 00:26:10,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 361. [2020-10-28 00:26:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-28 00:26:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 548 transitions. [2020-10-28 00:26:10,620 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 548 transitions. Word has length 105 [2020-10-28 00:26:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:10,622 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 548 transitions. [2020-10-28 00:26:10,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:10,622 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 548 transitions. [2020-10-28 00:26:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:26:10,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:10,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:26:10,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:26:10,633 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:10,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:10,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1749820210, now seen corresponding path program 1 times [2020-10-28 00:26:10,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:10,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259425003] [2020-10-28 00:26:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:10,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:11,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:11,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:11,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:11,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:12,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:12,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:13,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:14,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:14,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:14,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:15,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:15,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:26:15,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:26:15,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 00:26:15,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:15,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:26:15,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:26:15,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 00:26:15,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:16,188 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:26:16,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:16,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:16,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:16,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:16,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:16,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:26:16,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:16,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:16,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259425003] [2020-10-28 00:26:16,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:16,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:26:16,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493784213] [2020-10-28 00:26:16,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:26:16,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:16,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:26:16,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:16,275 INFO L87 Difference]: Start difference. First operand 361 states and 548 transitions. Second operand 5 states. [2020-10-28 00:26:17,716 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:26:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:18,753 INFO L93 Difference]: Finished difference Result 1024 states and 1549 transitions. [2020-10-28 00:26:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:26:18,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-10-28 00:26:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:18,761 INFO L225 Difference]: With dead ends: 1024 [2020-10-28 00:26:18,761 INFO L226 Difference]: Without dead ends: 684 [2020-10-28 00:26:18,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:26:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2020-10-28 00:26:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 681. [2020-10-28 00:26:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2020-10-28 00:26:18,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1024 transitions. [2020-10-28 00:26:18,866 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1024 transitions. Word has length 105 [2020-10-28 00:26:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:18,867 INFO L481 AbstractCegarLoop]: Abstraction has 681 states and 1024 transitions. [2020-10-28 00:26:18,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:26:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1024 transitions. [2020-10-28 00:26:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 00:26:18,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:18,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:26:18,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:26:18,870 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1184069629, now seen corresponding path program 1 times [2020-10-28 00:26:18,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:18,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363332788] [2020-10-28 00:26:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:18,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:19,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:19,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:19,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:19,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:19,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:20,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:21,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:23,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:23,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 00:26:23,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:26:23,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 00:26:23,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:23,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:23,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:26:23,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:26:23,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:24,294 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:26:24,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:24,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:24,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:24,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:24,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:24,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:26:24,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:24,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:24,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363332788] [2020-10-28 00:26:24,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:24,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:24,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782053043] [2020-10-28 00:26:24,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:24,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:24,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:24,353 INFO L87 Difference]: Start difference. First operand 681 states and 1024 transitions. Second operand 4 states. [2020-10-28 00:26:26,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:26,557 INFO L93 Difference]: Finished difference Result 1991 states and 2994 transitions. [2020-10-28 00:26:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:26:26,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-28 00:26:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:26,569 INFO L225 Difference]: With dead ends: 1991 [2020-10-28 00:26:26,570 INFO L226 Difference]: Without dead ends: 1338 [2020-10-28 00:26:26,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2020-10-28 00:26:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 683. [2020-10-28 00:26:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2020-10-28 00:26:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1026 transitions. [2020-10-28 00:26:26,639 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1026 transitions. Word has length 106 [2020-10-28 00:26:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:26,639 INFO L481 AbstractCegarLoop]: Abstraction has 683 states and 1026 transitions. [2020-10-28 00:26:26,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1026 transitions. [2020-10-28 00:26:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:26:26,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:26,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:26:26,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:26:26,642 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:26,643 INFO L82 PathProgramCache]: Analyzing trace with hash -212750038, now seen corresponding path program 1 times [2020-10-28 00:26:26,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:26,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41491034] [2020-10-28 00:26:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:26,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:26,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:26,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:26,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:27,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:27,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:27,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:29,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:29,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:31,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:31,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:26:31,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:26:31,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:26:31,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 00:26:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 00:26:31,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:26:32,169 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:26:32,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:32,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:32,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:32,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:32,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:32,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:26:32,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:32,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:32,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:32,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:32,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:32,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41491034] [2020-10-28 00:26:32,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:32,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:32,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638776257] [2020-10-28 00:26:32,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:32,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:32,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:32,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:32,249 INFO L87 Difference]: Start difference. First operand 683 states and 1026 transitions. Second operand 4 states. [2020-10-28 00:26:34,026 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-28 00:26:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:34,990 INFO L93 Difference]: Finished difference Result 1707 states and 2578 transitions. [2020-10-28 00:26:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:34,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-28 00:26:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:35,000 INFO L225 Difference]: With dead ends: 1707 [2020-10-28 00:26:35,000 INFO L226 Difference]: Without dead ends: 1203 [2020-10-28 00:26:35,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2020-10-28 00:26:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1200. [2020-10-28 00:26:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2020-10-28 00:26:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1776 transitions. [2020-10-28 00:26:35,090 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1776 transitions. Word has length 107 [2020-10-28 00:26:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:35,092 INFO L481 AbstractCegarLoop]: Abstraction has 1200 states and 1776 transitions. [2020-10-28 00:26:35,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1776 transitions. [2020-10-28 00:26:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:26:35,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:35,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:26:35,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:26:35,097 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1814327789, now seen corresponding path program 1 times [2020-10-28 00:26:35,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:35,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841437212] [2020-10-28 00:26:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:35,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:36,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:36,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:37,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:37,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:37,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:37,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:37,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:40,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:40,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:26:40,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:26:40,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:26:40,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:40,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:26:40,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 00:26:40,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:26:40,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:40,743 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:26:40,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:40,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:40,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:40,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:40,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:40,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:26:40,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:40,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:40,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841437212] [2020-10-28 00:26:40,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:40,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:26:40,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729519196] [2020-10-28 00:26:40,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:26:40,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:26:40,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:40,810 INFO L87 Difference]: Start difference. First operand 1200 states and 1776 transitions. Second operand 5 states. [2020-10-28 00:26:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:42,114 INFO L93 Difference]: Finished difference Result 2033 states and 3044 transitions. [2020-10-28 00:26:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:42,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-10-28 00:26:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:42,122 INFO L225 Difference]: With dead ends: 2033 [2020-10-28 00:26:42,122 INFO L226 Difference]: Without dead ends: 1000 [2020-10-28 00:26:42,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:26:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2020-10-28 00:26:42,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 1000. [2020-10-28 00:26:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1000 states. [2020-10-28 00:26:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1485 transitions. [2020-10-28 00:26:42,192 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1485 transitions. Word has length 107 [2020-10-28 00:26:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:42,193 INFO L481 AbstractCegarLoop]: Abstraction has 1000 states and 1485 transitions. [2020-10-28 00:26:42,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:26:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1485 transitions. [2020-10-28 00:26:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:26:42,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:42,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:26:42,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:26:42,199 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:42,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1679572401, now seen corresponding path program 1 times [2020-10-28 00:26:42,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:42,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296425070] [2020-10-28 00:26:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:42,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:43,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:43,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:47,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:47,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:26:47,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:26:47,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 00:26:47,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:47,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:47,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 00:26:47,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 00:26:47,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:47,618 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:26:47,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:47,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:47,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:47,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:47,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:47,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:26:47,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:47,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:47,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296425070] [2020-10-28 00:26:47,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:47,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:47,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968148895] [2020-10-28 00:26:47,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:47,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:47,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:47,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:47,704 INFO L87 Difference]: Start difference. First operand 1000 states and 1485 transitions. Second operand 4 states. [2020-10-28 00:26:49,442 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-28 00:26:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:49,727 INFO L93 Difference]: Finished difference Result 2231 states and 3436 transitions. [2020-10-28 00:26:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:49,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-28 00:26:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:49,736 INFO L225 Difference]: With dead ends: 2231 [2020-10-28 00:26:49,736 INFO L226 Difference]: Without dead ends: 1449 [2020-10-28 00:26:49,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2020-10-28 00:26:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1416. [2020-10-28 00:26:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-10-28 00:26:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2161 transitions. [2020-10-28 00:26:49,822 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2161 transitions. Word has length 107 [2020-10-28 00:26:49,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:49,823 INFO L481 AbstractCegarLoop]: Abstraction has 1416 states and 2161 transitions. [2020-10-28 00:26:49,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2161 transitions. [2020-10-28 00:26:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 00:26:49,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:49,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:26:49,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:26:49,825 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:49,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:49,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1575115643, now seen corresponding path program 1 times [2020-10-28 00:26:49,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:49,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992465495] [2020-10-28 00:26:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:49,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:49,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:49,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:50,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:50,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:50,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:50,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:52,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:54,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:54,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 00:26:54,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:26:54,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:26:54,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:54,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:54,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 00:26:54,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:26:54,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:55,237 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:26:55,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:55,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:55,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:55,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:55,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:55,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:26:55,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:55,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:55,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:55,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:55,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:55,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992465495] [2020-10-28 00:26:55,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:55,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:55,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937303077] [2020-10-28 00:26:55,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:55,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:55,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:55,304 INFO L87 Difference]: Start difference. First operand 1416 states and 2161 transitions. Second operand 4 states. [2020-10-28 00:26:56,866 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-28 00:26:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:57,298 INFO L93 Difference]: Finished difference Result 3381 states and 5325 transitions. [2020-10-28 00:26:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:57,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-28 00:26:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:57,311 INFO L225 Difference]: With dead ends: 3381 [2020-10-28 00:26:57,312 INFO L226 Difference]: Without dead ends: 2223 [2020-10-28 00:26:57,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2020-10-28 00:26:57,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 2160. [2020-10-28 00:26:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2160 states. [2020-10-28 00:26:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 3364 transitions. [2020-10-28 00:26:57,467 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 3364 transitions. Word has length 109 [2020-10-28 00:26:57,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:57,468 INFO L481 AbstractCegarLoop]: Abstraction has 2160 states and 3364 transitions. [2020-10-28 00:26:57,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 3364 transitions. [2020-10-28 00:26:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 00:26:57,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:57,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:26:57,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:26:57,471 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:57,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1091037833, now seen corresponding path program 1 times [2020-10-28 00:26:57,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:57,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042491248] [2020-10-28 00:26:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:57,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:57,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:57,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:57,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:57,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:57,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:57,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:00,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:00,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:02,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:02,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 00:27:02,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:27:02,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:27:02,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:02,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:27:02,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:27:02,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 00:27:02,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:02,944 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:27:02,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:02,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:02,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:02,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:02,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:02,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:27:02,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:02,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:02,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:02,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:02,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:03,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042491248] [2020-10-28 00:27:03,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:03,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:27:03,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492717660] [2020-10-28 00:27:03,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:27:03,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:03,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:27:03,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:03,008 INFO L87 Difference]: Start difference. First operand 2160 states and 3364 transitions. Second operand 5 states. [2020-10-28 00:27:04,460 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:27:05,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:05,440 INFO L93 Difference]: Finished difference Result 4351 states and 6752 transitions. [2020-10-28 00:27:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:27:05,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-10-28 00:27:05,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:05,453 INFO L225 Difference]: With dead ends: 4351 [2020-10-28 00:27:05,453 INFO L226 Difference]: Without dead ends: 2228 [2020-10-28 00:27:05,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:27:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2020-10-28 00:27:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2155. [2020-10-28 00:27:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2155 states. [2020-10-28 00:27:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 3351 transitions. [2020-10-28 00:27:05,592 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 3351 transitions. Word has length 110 [2020-10-28 00:27:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:05,593 INFO L481 AbstractCegarLoop]: Abstraction has 2155 states and 3351 transitions. [2020-10-28 00:27:05,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:27:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 3351 transitions. [2020-10-28 00:27:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 00:27:05,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:05,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:27:05,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:27:05,595 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:05,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1104882966, now seen corresponding path program 1 times [2020-10-28 00:27:05,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:05,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261381430] [2020-10-28 00:27:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:05,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:10,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:10,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 00:27:10,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:10,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:27:10,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:27:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:27:10,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:11,025 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:27:11,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:11,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:11,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:11,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:11,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:11,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:27:11,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:11,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:11,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:11,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:11,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:11,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261381430] [2020-10-28 00:27:11,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:11,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:11,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114021987] [2020-10-28 00:27:11,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:11,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:11,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:11,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:11,064 INFO L87 Difference]: Start difference. First operand 2155 states and 3351 transitions. Second operand 4 states. [2020-10-28 00:27:13,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:13,394 INFO L93 Difference]: Finished difference Result 5622 states and 8769 transitions. [2020-10-28 00:27:13,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:27:13,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-28 00:27:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:13,417 INFO L225 Difference]: With dead ends: 5622 [2020-10-28 00:27:13,417 INFO L226 Difference]: Without dead ends: 4266 [2020-10-28 00:27:13,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:13,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2020-10-28 00:27:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 2157. [2020-10-28 00:27:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2157 states. [2020-10-28 00:27:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3353 transitions. [2020-10-28 00:27:13,607 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3353 transitions. Word has length 111 [2020-10-28 00:27:13,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:13,608 INFO L481 AbstractCegarLoop]: Abstraction has 2157 states and 3353 transitions. [2020-10-28 00:27:13,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3353 transitions. [2020-10-28 00:27:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 00:27:13,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:13,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:27:13,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:27:13,611 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:13,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:13,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1237155225, now seen corresponding path program 1 times [2020-10-28 00:27:13,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:13,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52494405] [2020-10-28 00:27:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:13,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:13,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:13,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:13,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:13,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:14,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:15,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:15,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:15,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:15,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:15,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:16,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:18,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:18,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 00:27:18,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:27:18,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:27:18,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:18,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:18,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-28 00:27:18,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:27:18,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:19,066 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:27:19,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:19,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:19,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:19,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:19,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:19,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:27:19,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:19,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:19,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:19,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:19,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:19,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52494405] [2020-10-28 00:27:19,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:19,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:19,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936045796] [2020-10-28 00:27:19,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:19,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:19,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:19,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:19,115 INFO L87 Difference]: Start difference. First operand 2157 states and 3353 transitions. Second operand 4 states. [2020-10-28 00:27:19,537 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:27:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:21,333 INFO L93 Difference]: Finished difference Result 5497 states and 8811 transitions. [2020-10-28 00:27:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:21,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-10-28 00:27:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:21,351 INFO L225 Difference]: With dead ends: 5497 [2020-10-28 00:27:21,352 INFO L226 Difference]: Without dead ends: 3827 [2020-10-28 00:27:21,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:21,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2020-10-28 00:27:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3812. [2020-10-28 00:27:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3812 states. [2020-10-28 00:27:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 5993 transitions. [2020-10-28 00:27:21,621 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 5993 transitions. Word has length 112 [2020-10-28 00:27:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:21,622 INFO L481 AbstractCegarLoop]: Abstraction has 3812 states and 5993 transitions. [2020-10-28 00:27:21,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 5993 transitions. [2020-10-28 00:27:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 00:27:21,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:21,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:27:21,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:27:21,625 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:21,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:21,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1434749117, now seen corresponding path program 1 times [2020-10-28 00:27:21,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:21,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899229452] [2020-10-28 00:27:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:21,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:21,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:21,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:21,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:21,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:21,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:23,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:23,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:23,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:24,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:24,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:24,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:26,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:26,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 00:27:26,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:27:26,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:27:26,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:26,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:27:26,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 00:27:26,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 00:27:26,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:27,075 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:27:27,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:27,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:27,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:27,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:27,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:27,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:27:27,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:27,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:27,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:27,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899229452] [2020-10-28 00:27:27,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:27,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:27:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490995923] [2020-10-28 00:27:27,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:27:27,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:27,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:27:27,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:27,124 INFO L87 Difference]: Start difference. First operand 3812 states and 5993 transitions. Second operand 5 states. [2020-10-28 00:27:27,527 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:27:28,689 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:27:29,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:29,804 INFO L93 Difference]: Finished difference Result 7212 states and 11466 transitions. [2020-10-28 00:27:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:27:29,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-28 00:27:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:29,824 INFO L225 Difference]: With dead ends: 7212 [2020-10-28 00:27:29,824 INFO L226 Difference]: Without dead ends: 3815 [2020-10-28 00:27:29,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:27:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3815 states. [2020-10-28 00:27:30,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3815 to 3812. [2020-10-28 00:27:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3812 states. [2020-10-28 00:27:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 5966 transitions. [2020-10-28 00:27:30,072 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 5966 transitions. Word has length 112 [2020-10-28 00:27:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:30,072 INFO L481 AbstractCegarLoop]: Abstraction has 3812 states and 5966 transitions. [2020-10-28 00:27:30,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:27:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 5966 transitions. [2020-10-28 00:27:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 00:27:30,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:30,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:27:30,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:27:30,075 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:30,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:30,076 INFO L82 PathProgramCache]: Analyzing trace with hash -638474058, now seen corresponding path program 1 times [2020-10-28 00:27:30,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:30,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083749587] [2020-10-28 00:27:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:30,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:30,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:30,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:30,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:30,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:31,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:31,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:31,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:31,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:31,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:35,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:35,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 00:27:35,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:27:35,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:27:35,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:35,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:27:35,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:27:35,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 00:27:35,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:35,593 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:27:35,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:35,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:35,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:35,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:35,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:35,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:27:35,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:35,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:35,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:35,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:35,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:35,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083749587] [2020-10-28 00:27:35,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:35,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:27:35,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925398377] [2020-10-28 00:27:35,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:27:35,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:27:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:35,651 INFO L87 Difference]: Start difference. First operand 3812 states and 5966 transitions. Second operand 5 states. [2020-10-28 00:27:37,294 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:27:38,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:38,745 INFO L93 Difference]: Finished difference Result 10486 states and 16468 transitions. [2020-10-28 00:27:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:27:38,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-28 00:27:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:38,792 INFO L225 Difference]: With dead ends: 10486 [2020-10-28 00:27:38,792 INFO L226 Difference]: Without dead ends: 6941 [2020-10-28 00:27:38,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:27:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2020-10-28 00:27:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 6938. [2020-10-28 00:27:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6938 states. [2020-10-28 00:27:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6938 states to 6938 states and 10758 transitions. [2020-10-28 00:27:39,322 INFO L78 Accepts]: Start accepts. Automaton has 6938 states and 10758 transitions. Word has length 112 [2020-10-28 00:27:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:39,322 INFO L481 AbstractCegarLoop]: Abstraction has 6938 states and 10758 transitions. [2020-10-28 00:27:39,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:27:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 6938 states and 10758 transitions. [2020-10-28 00:27:39,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 00:27:39,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:39,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:27:39,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:27:39,326 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:39,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:39,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1704326546, now seen corresponding path program 1 times [2020-10-28 00:27:39,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:39,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872305494] [2020-10-28 00:27:39,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:39,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:39,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:39,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:39,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:39,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:39,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:44,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:44,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 00:27:44,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:27:44,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:27:44,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:44,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:27:44,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:27:44,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:27:44,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:44,777 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:27:44,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:44,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:44,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:44,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:44,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:44,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:27:44,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:44,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:44,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:44,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:44,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:44,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872305494] [2020-10-28 00:27:44,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:44,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:27:44,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443385580] [2020-10-28 00:27:44,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:27:44,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:27:44,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:44,822 INFO L87 Difference]: Start difference. First operand 6938 states and 10758 transitions. Second operand 5 states. [2020-10-28 00:27:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:46,267 INFO L93 Difference]: Finished difference Result 13110 states and 20337 transitions. [2020-10-28 00:27:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:46,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-28 00:27:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:46,283 INFO L225 Difference]: With dead ends: 13110 [2020-10-28 00:27:46,283 INFO L226 Difference]: Without dead ends: 6252 [2020-10-28 00:27:46,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:27:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6252 states. [2020-10-28 00:27:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6252 to 6250. [2020-10-28 00:27:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6250 states. [2020-10-28 00:27:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6250 states to 6250 states and 9687 transitions. [2020-10-28 00:27:46,690 INFO L78 Accepts]: Start accepts. Automaton has 6250 states and 9687 transitions. Word has length 112 [2020-10-28 00:27:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:46,691 INFO L481 AbstractCegarLoop]: Abstraction has 6250 states and 9687 transitions. [2020-10-28 00:27:46,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:27:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 6250 states and 9687 transitions. [2020-10-28 00:27:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 00:27:46,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:46,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:27:46,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:27:46,693 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:46,694 INFO L82 PathProgramCache]: Analyzing trace with hash 766672368, now seen corresponding path program 1 times [2020-10-28 00:27:46,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:46,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722986709] [2020-10-28 00:27:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:46,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:46,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:46,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:46,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:46,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:47,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:47,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:47,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:47,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:47,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:50,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:50,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 00:27:50,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:27:50,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3698 [2020-10-28 00:27:50,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:50,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:50,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 00:27:50,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 00:27:50,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:50,811 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:27:50,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:50,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:50,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:50,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:50,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:50,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:27:50,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:50,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:50,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722986709] [2020-10-28 00:27:50,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:50,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:50,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35541193] [2020-10-28 00:27:50,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:50,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:50,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:50,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:50,904 INFO L87 Difference]: Start difference. First operand 6250 states and 9687 transitions. Second operand 4 states. [2020-10-28 00:27:52,283 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-28 00:27:53,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:53,282 INFO L93 Difference]: Finished difference Result 15599 states and 24273 transitions. [2020-10-28 00:27:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:53,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2020-10-28 00:27:53,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:53,307 INFO L225 Difference]: With dead ends: 15599 [2020-10-28 00:27:53,307 INFO L226 Difference]: Without dead ends: 9695 [2020-10-28 00:27:53,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9695 states. [2020-10-28 00:27:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9695 to 9692. [2020-10-28 00:27:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9692 states. [2020-10-28 00:27:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9692 states to 9692 states and 14865 transitions. [2020-10-28 00:27:54,020 INFO L78 Accepts]: Start accepts. Automaton has 9692 states and 14865 transitions. Word has length 114 [2020-10-28 00:27:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:54,020 INFO L481 AbstractCegarLoop]: Abstraction has 9692 states and 14865 transitions. [2020-10-28 00:27:54,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 9692 states and 14865 transitions. [2020-10-28 00:27:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 00:27:54,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:54,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:27:54,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:27:54,023 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash 225535141, now seen corresponding path program 1 times [2020-10-28 00:27:54,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:54,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627539523] [2020-10-28 00:27:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:54,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:54,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:54,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:54,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:54,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:54,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:54,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:56,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:56,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 00:27:56,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:56,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2602 [2020-10-28 00:27:56,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:56,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:56,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 00:27:56,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 00:27:56,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:57,041 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:27:57,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:57,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:57,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:57,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:57,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:57,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:27:57,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:57,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:57,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627539523] [2020-10-28 00:27:57,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:57,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:57,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830932193] [2020-10-28 00:27:57,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:57,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:57,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:57,082 INFO L87 Difference]: Start difference. First operand 9692 states and 14865 transitions. Second operand 4 states. [2020-10-28 00:27:59,350 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-28 00:28:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:00,066 INFO L93 Difference]: Finished difference Result 26318 states and 40963 transitions. [2020-10-28 00:28:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:00,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-28 00:28:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:00,109 INFO L225 Difference]: With dead ends: 26318 [2020-10-28 00:28:00,109 INFO L226 Difference]: Without dead ends: 16999 [2020-10-28 00:28:00,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:00,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16999 states. [2020-10-28 00:28:01,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16999 to 16436. [2020-10-28 00:28:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16436 states. [2020-10-28 00:28:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16436 states to 16436 states and 25492 transitions. [2020-10-28 00:28:01,350 INFO L78 Accepts]: Start accepts. Automaton has 16436 states and 25492 transitions. Word has length 116 [2020-10-28 00:28:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:01,350 INFO L481 AbstractCegarLoop]: Abstraction has 16436 states and 25492 transitions. [2020-10-28 00:28:01,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:28:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 16436 states and 25492 transitions. [2020-10-28 00:28:01,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 00:28:01,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:01,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:28:01,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:28:01,354 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:01,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2048678844, now seen corresponding path program 1 times [2020-10-28 00:28:01,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:01,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129768456] [2020-10-28 00:28:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:01,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:01,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:01,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:01,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:01,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:02,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:02,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:04,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:04,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 00:28:04,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:28:04,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3300 [2020-10-28 00:28:04,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:04,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:28:04,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:28:04,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 00:28:04,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:05,156 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:28:05,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:05,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:05,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:05,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:05,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:05,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:28:05,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:05,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:05,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129768456] [2020-10-28 00:28:05,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:05,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:28:05,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34801333] [2020-10-28 00:28:05,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:28:05,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:05,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:28:05,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:05,201 INFO L87 Difference]: Start difference. First operand 16436 states and 25492 transitions. Second operand 5 states. [2020-10-28 00:28:06,840 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:28:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:09,645 INFO L93 Difference]: Finished difference Result 42166 states and 65511 transitions. [2020-10-28 00:28:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:28:09,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-28 00:28:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:09,694 INFO L225 Difference]: With dead ends: 42166 [2020-10-28 00:28:09,694 INFO L226 Difference]: Without dead ends: 26238 [2020-10-28 00:28:09,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:28:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26238 states. [2020-10-28 00:28:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26238 to 26233. [2020-10-28 00:28:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26233 states. [2020-10-28 00:28:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26233 states to 26233 states and 40219 transitions. [2020-10-28 00:28:12,062 INFO L78 Accepts]: Start accepts. Automaton has 26233 states and 40219 transitions. Word has length 117 [2020-10-28 00:28:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:12,063 INFO L481 AbstractCegarLoop]: Abstraction has 26233 states and 40219 transitions. [2020-10-28 00:28:12,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:28:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 26233 states and 40219 transitions. [2020-10-28 00:28:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 00:28:12,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:12,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:28:12,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:28:12,067 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:12,068 INFO L82 PathProgramCache]: Analyzing trace with hash 892856359, now seen corresponding path program 1 times [2020-10-28 00:28:12,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:12,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498562232] [2020-10-28 00:28:12,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:12,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:12,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:12,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:12,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:13,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:13,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:13,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:14,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:14,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 00:28:14,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:28:14,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2803 [2020-10-28 00:28:14,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:14,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:28:14,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:28:14,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:28:14,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:15,293 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:28:15,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:15,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:15,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:15,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:15,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:15,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:28:15,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:15,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:15,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:15,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:15,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:15,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498562232] [2020-10-28 00:28:15,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:15,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:28:15,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137776827] [2020-10-28 00:28:15,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:28:15,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:15,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:28:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:28:15,331 INFO L87 Difference]: Start difference. First operand 26233 states and 40219 transitions. Second operand 4 states. [2020-10-28 00:28:17,172 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-28 00:28:21,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:21,181 INFO L93 Difference]: Finished difference Result 72156 states and 110720 transitions. [2020-10-28 00:28:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:21,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-10-28 00:28:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:21,410 INFO L225 Difference]: With dead ends: 72156 [2020-10-28 00:28:21,410 INFO L226 Difference]: Without dead ends: 46749 [2020-10-28 00:28:21,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46749 states. [2020-10-28 00:28:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46749 to 46746. [2020-10-28 00:28:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46746 states. [2020-10-28 00:28:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46746 states to 46746 states and 70818 transitions. [2020-10-28 00:28:25,486 INFO L78 Accepts]: Start accepts. Automaton has 46746 states and 70818 transitions. Word has length 119 [2020-10-28 00:28:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:25,486 INFO L481 AbstractCegarLoop]: Abstraction has 46746 states and 70818 transitions. [2020-10-28 00:28:25,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:28:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 46746 states and 70818 transitions. [2020-10-28 00:28:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 00:28:25,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:25,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:28:25,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:28:25,493 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:25,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1070518570, now seen corresponding path program 1 times [2020-10-28 00:28:25,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:25,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150674136] [2020-10-28 00:28:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:25,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:25,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:25,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:25,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:25,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:26,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:26,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:29,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:29,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 00:28:29,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:28:29,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4255 [2020-10-28 00:28:29,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:29,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:28:29,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:28:29,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:28:29,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:30,194 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:28:30,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:30,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:30,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:30,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:30,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:30,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:28:30,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:30,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:30,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150674136] [2020-10-28 00:28:30,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:30,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:28:30,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084560222] [2020-10-28 00:28:30,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:28:30,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:30,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:28:30,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:30,244 INFO L87 Difference]: Start difference. First operand 46746 states and 70818 transitions. Second operand 5 states. [2020-10-28 00:28:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:34,312 INFO L93 Difference]: Finished difference Result 85407 states and 129422 transitions. [2020-10-28 00:28:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:34,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-10-28 00:28:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:34,559 INFO L225 Difference]: With dead ends: 85407 [2020-10-28 00:28:34,559 INFO L226 Difference]: Without dead ends: 39088 [2020-10-28 00:28:34,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:28:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39088 states. [2020-10-28 00:28:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39088 to 39088. [2020-10-28 00:28:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39088 states. [2020-10-28 00:28:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39088 states to 39088 states and 59080 transitions. [2020-10-28 00:28:37,906 INFO L78 Accepts]: Start accepts. Automaton has 39088 states and 59080 transitions. Word has length 119 [2020-10-28 00:28:37,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:37,906 INFO L481 AbstractCegarLoop]: Abstraction has 39088 states and 59080 transitions. [2020-10-28 00:28:37,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:28:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 39088 states and 59080 transitions. [2020-10-28 00:28:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 00:28:37,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:37,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:28:37,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:28:37,913 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:37,914 INFO L82 PathProgramCache]: Analyzing trace with hash 624131755, now seen corresponding path program 1 times [2020-10-28 00:28:37,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:37,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060084411] [2020-10-28 00:28:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:37,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:39,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:39,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:42,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:42,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 00:28:42,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:28:42,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 00:28:42,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:42,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 00:28:42,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 00:28:42,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 00:28:42,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:43,749 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:28:43,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:43,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:43,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:43,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:43,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:43,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:28:43,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:43,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:43,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:43,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:43,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:43,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060084411] [2020-10-28 00:28:43,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:43,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-28 00:28:43,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961868425] [2020-10-28 00:28:43,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 00:28:43,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:43,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 00:28:43,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-28 00:28:43,806 INFO L87 Difference]: Start difference. First operand 39088 states and 59080 transitions. Second operand 17 states. [2020-10-28 00:28:44,418 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 00:28:47,751 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-10-28 00:28:48,574 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 00:28:49,056 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:28:49,710 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 00:28:50,187 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-28 00:28:50,775 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 00:29:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:10,323 INFO L93 Difference]: Finished difference Result 209657 states and 316583 transitions. [2020-10-28 00:29:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 00:29:10,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 122 [2020-10-28 00:29:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:10,737 INFO L225 Difference]: With dead ends: 209657 [2020-10-28 00:29:10,737 INFO L226 Difference]: Without dead ends: 172022 [2020-10-28 00:29:10,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=550, Invalid=2206, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 00:29:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172022 states. [2020-10-28 00:29:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172022 to 59189. [2020-10-28 00:29:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59189 states. [2020-10-28 00:29:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59189 states to 59189 states and 88702 transitions. [2020-10-28 00:29:18,437 INFO L78 Accepts]: Start accepts. Automaton has 59189 states and 88702 transitions. Word has length 122 [2020-10-28 00:29:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:18,438 INFO L481 AbstractCegarLoop]: Abstraction has 59189 states and 88702 transitions. [2020-10-28 00:29:18,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 00:29:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 59189 states and 88702 transitions. [2020-10-28 00:29:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 00:29:18,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:18,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:29:18,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:29:18,446 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:18,447 INFO L82 PathProgramCache]: Analyzing trace with hash -245975991, now seen corresponding path program 1 times [2020-10-28 00:29:18,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:18,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482643972] [2020-10-28 00:29:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:18,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:18,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:18,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:18,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:19,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:21,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 00:29:21,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:29:21,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2524 [2020-10-28 00:29:21,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:21,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:29:21,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:29:21,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 00:29:21,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:21,474 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:29:21,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:21,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:21,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:21,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:21,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:29:21,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:21,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:29:21,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482643972] [2020-10-28 00:29:21,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:21,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:29:21,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594653701] [2020-10-28 00:29:21,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:29:21,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:21,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:29:21,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:29:21,546 INFO L87 Difference]: Start difference. First operand 59189 states and 88702 transitions. Second operand 5 states. [2020-10-28 00:29:23,618 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:29:31,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:31,261 INFO L93 Difference]: Finished difference Result 88707 states and 132802 transitions. [2020-10-28 00:29:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:29:31,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-28 00:29:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:31,337 INFO L225 Difference]: With dead ends: 88707 [2020-10-28 00:29:31,337 INFO L226 Difference]: Without dead ends: 59483 [2020-10-28 00:29:31,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:29:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59483 states.