/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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:24:30,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:24:30,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:24:30,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:24:30,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:24:30,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:24:30,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:24:30,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:24:30,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:24:30,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:24:30,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:24:30,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:24:30,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:24:30,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:24:30,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:24:30,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:24:30,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:24:30,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:24:30,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:24:30,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:24:30,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:24:30,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:24:30,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:24:30,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:24:30,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:24:30,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:24:30,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:24:30,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:24:30,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:24:30,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:24:30,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:24:30,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:24:30,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:24:30,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:24:30,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:24:30,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:24:30,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:24:30,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:24:30,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:24:30,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:24:30,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:24:30,350 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 00:24:30,378 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:24:30,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:24:30,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:24:30,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:24:30,380 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:24:30,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:24:30,381 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:24:30,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:24:30,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:24:30,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:24:30,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:24:30,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:24:30,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:24:30,382 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:24:30,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:24:30,383 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:24:30,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:24:30,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:24:30,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:24:30,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:24:30,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:24:30,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:24:30,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:24:30,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:24:30,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:24:30,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:24:30,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:24:30,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:24:30,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:24:30,386 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:24:30,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:24:30,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:24:30,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:24:30,810 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:24:30,811 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:24:30,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:24:30,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34eefdf7b/d34d02cfb57047fdb76428b954bdce4f/FLAGcfd8a0e3d [2020-10-28 00:24:31,544 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:24:31,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:24:31,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34eefdf7b/d34d02cfb57047fdb76428b954bdce4f/FLAGcfd8a0e3d [2020-10-28 00:24:31,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34eefdf7b/d34d02cfb57047fdb76428b954bdce4f [2020-10-28 00:24:31,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:24:31,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:24:31,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:24:31,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:24:31,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:24:31,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:24:31" (1/1) ... [2020-10-28 00:24:31,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2559ff0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:24:31, skipping insertion in model container [2020-10-28 00:24:31,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:24:31" (1/1) ... [2020-10-28 00:24:31,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:24:31,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:24:32,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:24:32,352 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:24:32,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:24:32,531 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:24:32,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:24:32 WrapperNode [2020-10-28 00:24:32,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:24:32,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:24:32,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:24:32,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:24:32,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:24:32" (1/1) ... [2020-10-28 00:24:32,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:24:32" (1/1) ... [2020-10-28 00:24:32,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:24:32" (1/1) ... [2020-10-28 00:24:32,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:24:32" (1/1) ... [2020-10-28 00:24:32,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:24:32" (1/1) ... [2020-10-28 00:24:32,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:24:32" (1/1) ... [2020-10-28 00:24:32,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:24:32" (1/1) ... [2020-10-28 00:24:32,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:24:32,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:24:32,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:24:32,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:24:32,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:24:32" (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 00:24:32,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:24:32,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:24:32,712 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:24:32,713 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:24:32,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:24:32,714 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:24:32,714 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:24:32,715 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:24:32,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:24:32,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:24:32,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:24:32,716 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:24:32,717 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:24:32,717 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:24:32,717 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:24:32,718 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:24:32,718 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:24:32,718 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:24:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:24:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:24:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:24:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:24:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:24:32,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:24:32,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:24:32,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:24:32,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:24:33,628 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:24:33,629 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:24:33,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:24:33 BoogieIcfgContainer [2020-10-28 00:24:33,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:24:33,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:24:33,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:24:33,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:24:33,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:24:31" (1/3) ... [2020-10-28 00:24:33,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f37a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:24:33, skipping insertion in model container [2020-10-28 00:24:33,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:24:32" (2/3) ... [2020-10-28 00:24:33,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f37a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:24:33, skipping insertion in model container [2020-10-28 00:24:33,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:24:33" (3/3) ... [2020-10-28 00:24:33,648 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:24:33,660 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:24:33,666 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:24:33,679 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:24:33,708 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:24:33,708 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:24:33,708 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:24:33,708 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:24:33,708 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:24:33,709 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:24:33,709 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:24:33,709 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:24:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-10-28 00:24:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 00:24:33,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:24:33,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:24:33,758 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:24:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:24:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1445642755, now seen corresponding path program 1 times [2020-10-28 00:24:33,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:24:33,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660478181] [2020-10-28 00:24:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:24:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:34,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:34,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:34,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:34,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:37,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:37,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 00:24:37,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:24:37,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3770 [2020-10-28 00:24:37,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:37,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:24:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:24:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:24:37,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 00:24:38,580 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:24:38,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:24:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:38,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:38,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:38,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:24:38,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:24:38,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 00:24:38,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:24:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:24:38,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:24:38,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:24:38,665 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 00:24:38,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660478181] [2020-10-28 00:24:38,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:24:38,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:24:38,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402864854] [2020-10-28 00:24:38,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:24:38,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:24:38,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:24:38,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:24:38,700 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 6 states. [2020-10-28 00:24:39,189 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:24:40,440 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:24:40,863 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:24:41,416 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:24:41,742 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:24:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:24:41,843 INFO L93 Difference]: Finished difference Result 716 states and 1192 transitions. [2020-10-28 00:24:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:24:41,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-28 00:24:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:24:41,894 INFO L225 Difference]: With dead ends: 716 [2020-10-28 00:24:41,894 INFO L226 Difference]: Without dead ends: 595 [2020-10-28 00:24:41,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:24:41,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-28 00:24:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 232. [2020-10-28 00:24:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-28 00:24:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 369 transitions. [2020-10-28 00:24:42,036 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 369 transitions. Word has length 61 [2020-10-28 00:24:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:24:42,038 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 369 transitions. [2020-10-28 00:24:42,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:24:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 369 transitions. [2020-10-28 00:24:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 00:24:42,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:24:42,047 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] [2020-10-28 00:24:42,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:24:42,048 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:24:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:24:42,049 INFO L82 PathProgramCache]: Analyzing trace with hash 519455636, now seen corresponding path program 1 times [2020-10-28 00:24:42,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:24:42,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123123049] [2020-10-28 00:24:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:24:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:42,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:42,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:42,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:42,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:42,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:45,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:45,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 00:24:45,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:24:45,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2990 [2020-10-28 00:24:45,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:45,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:24:45,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 00:24:45,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:24:45,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:45,487 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:24:45,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:24:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:45,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:45,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:45,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:24:45,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:24:45,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:24:45,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:24:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:24:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:24:45,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:45,535 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 00:24:45,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123123049] [2020-10-28 00:24:45,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:24:45,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:24:45,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382438617] [2020-10-28 00:24:45,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:24:45,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:24:45,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:24:45,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:24:45,539 INFO L87 Difference]: Start difference. First operand 232 states and 369 transitions. Second operand 7 states. [2020-10-28 00:24:45,943 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:24:47,149 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:24:47,542 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:24:47,940 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:24:48,330 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:24:48,707 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:24:49,389 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:24:50,005 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:24:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:24:50,021 INFO L93 Difference]: Finished difference Result 1486 states and 2445 transitions. [2020-10-28 00:24:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 00:24:50,021 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-28 00:24:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:24:50,031 INFO L225 Difference]: With dead ends: 1486 [2020-10-28 00:24:50,031 INFO L226 Difference]: Without dead ends: 1309 [2020-10-28 00:24:50,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:24:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2020-10-28 00:24:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 689. [2020-10-28 00:24:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 689 states. [2020-10-28 00:24:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1128 transitions. [2020-10-28 00:24:50,147 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1128 transitions. Word has length 62 [2020-10-28 00:24:50,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:24:50,148 INFO L481 AbstractCegarLoop]: Abstraction has 689 states and 1128 transitions. [2020-10-28 00:24:50,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:24:50,148 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1128 transitions. [2020-10-28 00:24:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 00:24:50,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:24:50,151 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] [2020-10-28 00:24:50,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:24:50,152 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:24:50,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:24:50,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1449262326, now seen corresponding path program 1 times [2020-10-28 00:24:50,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:24:50,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396596172] [2020-10-28 00:24:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:24:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:50,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:50,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:50,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:50,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:52,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:52,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 00:24:52,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:24:52,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2658 [2020-10-28 00:24:52,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:52,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:24:52,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 00:24:52,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:24:52,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:53,208 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:24:53,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:24:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:53,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:53,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:53,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:24:53,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:24:53,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:24:53,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:53,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:24:53,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:24:53,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:24:53,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:53,254 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 00:24:53,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396596172] [2020-10-28 00:24:53,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:24:53,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:24:53,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347304016] [2020-10-28 00:24:53,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:24:53,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:24:53,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:24:53,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:24:53,257 INFO L87 Difference]: Start difference. First operand 689 states and 1128 transitions. Second operand 5 states. [2020-10-28 00:24:53,639 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:24:54,720 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:24:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:24:54,835 INFO L93 Difference]: Finished difference Result 2433 states and 4028 transitions. [2020-10-28 00:24:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:24:54,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-28 00:24:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:24:54,847 INFO L225 Difference]: With dead ends: 2433 [2020-10-28 00:24:54,848 INFO L226 Difference]: Without dead ends: 1855 [2020-10-28 00:24:54,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:24:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2020-10-28 00:24:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1267. [2020-10-28 00:24:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1267 states. [2020-10-28 00:24:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 2086 transitions. [2020-10-28 00:24:54,955 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 2086 transitions. Word has length 63 [2020-10-28 00:24:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:24:54,956 INFO L481 AbstractCegarLoop]: Abstraction has 1267 states and 2086 transitions. [2020-10-28 00:24:54,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:24:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 2086 transitions. [2020-10-28 00:24:54,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 00:24:54,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:24:54,959 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] [2020-10-28 00:24:54,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:24:54,960 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:24:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:24:54,960 INFO L82 PathProgramCache]: Analyzing trace with hash 349797357, now seen corresponding path program 1 times [2020-10-28 00:24:54,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:24:54,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689205248] [2020-10-28 00:24:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:24:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:55,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:55,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:55,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:55,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:55,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:57,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:57,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 00:24:57,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:24:57,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2294 [2020-10-28 00:24:57,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:57,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:24:57,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 00:24:57,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:24:57,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:57,642 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:24:57,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:24:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:57,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:57,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:57,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:24:57,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:24:57,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:24:57,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:57,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:24:57,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:24:57,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:24:57,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:57,687 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 00:24:57,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689205248] [2020-10-28 00:24:57,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:24:57,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:24:57,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922231098] [2020-10-28 00:24:57,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:24:57,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:24:57,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:24:57,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:24:57,690 INFO L87 Difference]: Start difference. First operand 1267 states and 2086 transitions. Second operand 5 states. [2020-10-28 00:24:58,099 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:24:59,128 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:24:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:24:59,344 INFO L93 Difference]: Finished difference Result 4705 states and 7792 transitions. [2020-10-28 00:24:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:24:59,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-28 00:24:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:24:59,366 INFO L225 Difference]: With dead ends: 4705 [2020-10-28 00:24:59,366 INFO L226 Difference]: Without dead ends: 3559 [2020-10-28 00:24:59,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:24:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2020-10-28 00:24:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2396. [2020-10-28 00:24:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2396 states. [2020-10-28 00:24:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 3950 transitions. [2020-10-28 00:24:59,589 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 3950 transitions. Word has length 64 [2020-10-28 00:24:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:24:59,589 INFO L481 AbstractCegarLoop]: Abstraction has 2396 states and 3950 transitions. [2020-10-28 00:24:59,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:24:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 3950 transitions. [2020-10-28 00:24:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 00:24:59,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:24:59,591 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] [2020-10-28 00:24:59,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:24:59,592 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:24:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:24:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash 811273186, now seen corresponding path program 1 times [2020-10-28 00:24:59,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:24:59,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97403151] [2020-10-28 00:24:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:24:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:59,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:59,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:59,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:01,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:03,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:04,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:04,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 00:25:04,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:25:04,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:25:04,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:04,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:25:04,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:25:04,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 00:25:04,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:05,009 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:25:05,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:25:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:05,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:05,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:05,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:25:05,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:25:05,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:25:05,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:25:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:25:05,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:25:05,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:25:05,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97403151] [2020-10-28 00:25:05,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:25:05,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:25:05,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889126271] [2020-10-28 00:25:05,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:25:05,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:25:05,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:25:05,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:25:05,049 INFO L87 Difference]: Start difference. First operand 2396 states and 3950 transitions. Second operand 4 states. [2020-10-28 00:25:05,421 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:25:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:25:06,745 INFO L93 Difference]: Finished difference Result 6385 states and 10543 transitions. [2020-10-28 00:25:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:25:06,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 00:25:06,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:25:06,769 INFO L225 Difference]: With dead ends: 6385 [2020-10-28 00:25:06,770 INFO L226 Difference]: Without dead ends: 4060 [2020-10-28 00:25:06,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 00:25:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2020-10-28 00:25:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 4057. [2020-10-28 00:25:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4057 states. [2020-10-28 00:25:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4057 states to 4057 states and 6661 transitions. [2020-10-28 00:25:07,079 INFO L78 Accepts]: Start accepts. Automaton has 4057 states and 6661 transitions. Word has length 65 [2020-10-28 00:25:07,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:25:07,080 INFO L481 AbstractCegarLoop]: Abstraction has 4057 states and 6661 transitions. [2020-10-28 00:25:07,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:25:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4057 states and 6661 transitions. [2020-10-28 00:25:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 00:25:07,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:07,082 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] [2020-10-28 00:25:07,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:25:07,085 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:07,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:07,086 INFO L82 PathProgramCache]: Analyzing trace with hash 917295940, now seen corresponding path program 1 times [2020-10-28 00:25:07,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:07,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647387637] [2020-10-28 00:25:07,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:07,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:07,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:07,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:07,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:07,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:08,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:10,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:12,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:12,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 00:25:12,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:25:12,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:25:12,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:25:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:25:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 00:25:12,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:12,510 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:25:12,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:25:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:12,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:12,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:12,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:25:12,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:25:12,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:25:12,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:12,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:25:12,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:25:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:25:12,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:12,566 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 00:25:12,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647387637] [2020-10-28 00:25:12,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:25:12,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:25:12,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65666948] [2020-10-28 00:25:12,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:25:12,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:25:12,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:25:12,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:25:12,572 INFO L87 Difference]: Start difference. First operand 4057 states and 6661 transitions. Second operand 4 states. [2020-10-28 00:25:13,035 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:25:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:25:14,405 INFO L93 Difference]: Finished difference Result 10748 states and 17641 transitions. [2020-10-28 00:25:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:25:14,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 00:25:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:25:14,442 INFO L225 Difference]: With dead ends: 10748 [2020-10-28 00:25:14,443 INFO L226 Difference]: Without dead ends: 6778 [2020-10-28 00:25:14,452 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 00:25:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6778 states. [2020-10-28 00:25:14,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6778 to 6775. [2020-10-28 00:25:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6775 states. [2020-10-28 00:25:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6775 states to 6775 states and 11045 transitions. [2020-10-28 00:25:14,938 INFO L78 Accepts]: Start accepts. Automaton has 6775 states and 11045 transitions. Word has length 65 [2020-10-28 00:25:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:25:14,938 INFO L481 AbstractCegarLoop]: Abstraction has 6775 states and 11045 transitions. [2020-10-28 00:25:14,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:25:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 6775 states and 11045 transitions. [2020-10-28 00:25:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 00:25:14,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:14,939 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] [2020-10-28 00:25:14,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:25:14,940 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:14,941 INFO L82 PathProgramCache]: Analyzing trace with hash -248431194, now seen corresponding path program 1 times [2020-10-28 00:25:14,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:14,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350750061] [2020-10-28 00:25:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:14,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:15,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:15,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:15,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:15,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:15,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:17,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:19,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:19,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 00:25:19,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:25:19,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:25:19,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:25:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:25:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:25:19,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:20,457 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:25:20,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:25:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:20,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:20,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:20,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:25:20,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:25:20,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:25:20,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:25:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:25:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:25:20,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:25:20,506 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 00:25:20,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350750061] [2020-10-28 00:25:20,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:25:20,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:25:20,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417647993] [2020-10-28 00:25:20,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:25:20,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:25:20,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:25:20,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:25:20,509 INFO L87 Difference]: Start difference. First operand 6775 states and 11045 transitions. Second operand 4 states. [2020-10-28 00:25:20,983 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:25:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:25:22,474 INFO L93 Difference]: Finished difference Result 17725 states and 28825 transitions. [2020-10-28 00:25:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:25:22,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 00:25:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:25:22,544 INFO L225 Difference]: With dead ends: 17725 [2020-10-28 00:25:22,544 INFO L226 Difference]: Without dead ends: 11039 [2020-10-28 00:25:22,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 00:25:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11039 states. [2020-10-28 00:25:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11039 to 11002. [2020-10-28 00:25:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11002 states. [2020-10-28 00:25:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11002 states to 11002 states and 17739 transitions. [2020-10-28 00:25:23,425 INFO L78 Accepts]: Start accepts. Automaton has 11002 states and 17739 transitions. Word has length 65 [2020-10-28 00:25:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:25:23,425 INFO L481 AbstractCegarLoop]: Abstraction has 11002 states and 17739 transitions. [2020-10-28 00:25:23,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:25:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 11002 states and 17739 transitions. [2020-10-28 00:25:23,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:25:23,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:23,426 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] [2020-10-28 00:25:23,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:25:23,427 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:23,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2091935235, now seen corresponding path program 1 times [2020-10-28 00:25:23,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:23,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291254914] [2020-10-28 00:25:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:23,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:23,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:23,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:23,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:23,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:24,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:24,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:25:24,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:25:24,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 973 [2020-10-28 00:25:24,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:25:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 00:25:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 00:25:24,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:24,868 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:25:24,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:25:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:24,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:24,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:24,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:25:24,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:25:24,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:25:24,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:24,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:25:24,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:25:24,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:25:24,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:24,919 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 00:25:24,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291254914] [2020-10-28 00:25:24,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:25:24,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:25:24,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630178703] [2020-10-28 00:25:24,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:25:24,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:25:24,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:25:24,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:25:24,925 INFO L87 Difference]: Start difference. First operand 11002 states and 17739 transitions. Second operand 4 states. [2020-10-28 00:25:25,801 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:25:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:25:26,684 INFO L93 Difference]: Finished difference Result 27968 states and 44703 transitions. [2020-10-28 00:25:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:25:26,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 00:25:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:25:26,735 INFO L225 Difference]: With dead ends: 27968 [2020-10-28 00:25:26,735 INFO L226 Difference]: Without dead ends: 17021 [2020-10-28 00:25:26,764 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 00:25:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17021 states. [2020-10-28 00:25:27,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17021 to 17018. [2020-10-28 00:25:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17018 states. [2020-10-28 00:25:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17018 states to 17018 states and 26555 transitions. [2020-10-28 00:25:27,730 INFO L78 Accepts]: Start accepts. Automaton has 17018 states and 26555 transitions. Word has length 66 [2020-10-28 00:25:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:25:27,730 INFO L481 AbstractCegarLoop]: Abstraction has 17018 states and 26555 transitions. [2020-10-28 00:25:27,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:25:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 17018 states and 26555 transitions. [2020-10-28 00:25:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:25:27,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:27,732 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] [2020-10-28 00:25:27,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:25:27,732 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:27,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:27,733 INFO L82 PathProgramCache]: Analyzing trace with hash -252467996, now seen corresponding path program 1 times [2020-10-28 00:25:27,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:27,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098597701] [2020-10-28 00:25:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:27,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:27,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:27,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:27,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:27,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:28,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:28,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:25:28,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:25:28,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-28 00:25:28,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:28,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:25:28,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:25:28,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:25:28,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:28,750 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:25:28,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:25:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:28,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:28,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:28,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:25:28,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:25:28,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:25:28,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:28,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:25:28,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:25:28,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:25:28,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:28,787 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 00:25:28,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098597701] [2020-10-28 00:25:28,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:25:28,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:25:28,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473055887] [2020-10-28 00:25:28,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:25:28,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:25:28,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:25:28,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:25:28,789 INFO L87 Difference]: Start difference. First operand 17018 states and 26555 transitions. Second operand 4 states. [2020-10-28 00:25:29,128 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:25:30,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:25:30,784 INFO L93 Difference]: Finished difference Result 38589 states and 60237 transitions. [2020-10-28 00:25:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:25:30,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 00:25:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:25:30,849 INFO L225 Difference]: With dead ends: 38589 [2020-10-28 00:25:30,849 INFO L226 Difference]: Without dead ends: 21626 [2020-10-28 00:25:30,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 00:25:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21626 states. [2020-10-28 00:25:32,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21626 to 21623. [2020-10-28 00:25:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21623 states. [2020-10-28 00:25:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21623 states to 21623 states and 33657 transitions. [2020-10-28 00:25:32,092 INFO L78 Accepts]: Start accepts. Automaton has 21623 states and 33657 transitions. Word has length 67 [2020-10-28 00:25:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:25:32,092 INFO L481 AbstractCegarLoop]: Abstraction has 21623 states and 33657 transitions. [2020-10-28 00:25:32,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:25:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand 21623 states and 33657 transitions. [2020-10-28 00:25:32,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:25:32,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:32,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:25:32,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:25:32,093 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:32,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:32,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1276815005, now seen corresponding path program 1 times [2020-10-28 00:25:32,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:32,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675877592] [2020-10-28 00:25:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:32,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:32,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:32,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:32,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:32,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:34,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:34,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:25:34,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:25:34,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2044 [2020-10-28 00:25:34,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:34,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:25:34,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:25:34,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:25:34,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:34,538 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:25:34,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:25:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:34,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:34,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:34,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:25:34,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:25:34,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:25:34,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:34,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:25:34,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:25:34,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:25:34,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:34,576 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 00:25:34,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675877592] [2020-10-28 00:25:34,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:25:34,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:25:34,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147957944] [2020-10-28 00:25:34,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:25:34,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:25:34,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:25:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:25:34,579 INFO L87 Difference]: Start difference. First operand 21623 states and 33657 transitions. Second operand 4 states. [2020-10-28 00:25:34,928 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:25:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:25:36,679 INFO L93 Difference]: Finished difference Result 48915 states and 76167 transitions. [2020-10-28 00:25:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:25:36,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 00:25:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:25:36,724 INFO L225 Difference]: With dead ends: 48915 [2020-10-28 00:25:36,724 INFO L226 Difference]: Without dead ends: 27394 [2020-10-28 00:25:36,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 00:25:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27394 states. [2020-10-28 00:25:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27394 to 27391. [2020-10-28 00:25:38,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27391 states. [2020-10-28 00:25:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27391 states to 27391 states and 42533 transitions. [2020-10-28 00:25:38,291 INFO L78 Accepts]: Start accepts. Automaton has 27391 states and 42533 transitions. Word has length 69 [2020-10-28 00:25:38,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:25:38,291 INFO L481 AbstractCegarLoop]: Abstraction has 27391 states and 42533 transitions. [2020-10-28 00:25:38,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:25:38,291 INFO L276 IsEmpty]: Start isEmpty. Operand 27391 states and 42533 transitions. [2020-10-28 00:25:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:25:38,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:38,292 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] [2020-10-28 00:25:38,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:25:38,292 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:38,293 INFO L82 PathProgramCache]: Analyzing trace with hash 304045602, now seen corresponding path program 1 times [2020-10-28 00:25:38,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:38,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225202196] [2020-10-28 00:25:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:38,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:38,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:38,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:38,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:38,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:38,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:38,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:42,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:42,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:25:42,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:25:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3820 [2020-10-28 00:25:42,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:25:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 00:25:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 00:25:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:42,554 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:25:42,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:25:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:42,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:42,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:42,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:25:42,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:25:42,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:25:42,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:42,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:25:42,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:25:42,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:25:42,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:42,594 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 00:25:42,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225202196] [2020-10-28 00:25:42,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:25:42,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:25:42,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688255727] [2020-10-28 00:25:42,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:25:42,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:25:42,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:25:42,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:25:42,603 INFO L87 Difference]: Start difference. First operand 27391 states and 42533 transitions. Second operand 4 states. [2020-10-28 00:25:42,960 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:25:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:25:44,893 INFO L93 Difference]: Finished difference Result 58608 states and 91241 transitions. [2020-10-28 00:25:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:25:44,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 00:25:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:25:44,932 INFO L225 Difference]: With dead ends: 58608 [2020-10-28 00:25:44,932 INFO L226 Difference]: Without dead ends: 31306 [2020-10-28 00:25:44,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 00:25:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31306 states. [2020-10-28 00:25:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31306 to 31303. [2020-10-28 00:25:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31303 states. [2020-10-28 00:25:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31303 states to 31303 states and 48560 transitions. [2020-10-28 00:25:46,612 INFO L78 Accepts]: Start accepts. Automaton has 31303 states and 48560 transitions. Word has length 71 [2020-10-28 00:25:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:25:46,613 INFO L481 AbstractCegarLoop]: Abstraction has 31303 states and 48560 transitions. [2020-10-28 00:25:46,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:25:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 31303 states and 48560 transitions. [2020-10-28 00:25:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:25:46,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:46,614 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] [2020-10-28 00:25:46,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:25:46,614 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:46,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:46,615 INFO L82 PathProgramCache]: Analyzing trace with hash 888483744, now seen corresponding path program 1 times [2020-10-28 00:25:46,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:46,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616215923] [2020-10-28 00:25:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:46,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:46,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:46,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:46,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:46,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:47,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:47,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:51,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:51,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:25:51,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:25:51,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:25:51,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:51,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:25:51,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:25:51,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:25:51,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:52,089 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:25:52,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:25:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:52,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:52,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:52,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:25:52,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:25:52,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:25:52,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:52,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:25:52,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:25:52,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:25:52,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:52,137 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 00:25:52,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616215923] [2020-10-28 00:25:52,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:25:52,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:25:52,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017388708] [2020-10-28 00:25:52,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:25:52,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:25:52,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:25:52,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:25:52,139 INFO L87 Difference]: Start difference. First operand 31303 states and 48560 transitions. Second operand 6 states. [2020-10-28 00:25:52,571 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:25:53,790 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:25:54,188 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:25:54,779 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:25:56,512 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:25:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:25:57,546 INFO L93 Difference]: Finished difference Result 89359 states and 138812 transitions. [2020-10-28 00:25:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:25:57,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-28 00:25:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:25:57,646 INFO L225 Difference]: With dead ends: 89359 [2020-10-28 00:25:57,646 INFO L226 Difference]: Without dead ends: 58145 [2020-10-28 00:25:57,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:25:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58145 states. [2020-10-28 00:25:59,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58145 to 31303. [2020-10-28 00:25:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31303 states. [2020-10-28 00:25:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31303 states to 31303 states and 48419 transitions. [2020-10-28 00:25:59,743 INFO L78 Accepts]: Start accepts. Automaton has 31303 states and 48419 transitions. Word has length 72 [2020-10-28 00:25:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:25:59,744 INFO L481 AbstractCegarLoop]: Abstraction has 31303 states and 48419 transitions. [2020-10-28 00:25:59,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:25:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 31303 states and 48419 transitions. [2020-10-28 00:25:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 00:25:59,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:59,745 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] [2020-10-28 00:25:59,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:25:59,745 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:59,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:59,745 INFO L82 PathProgramCache]: Analyzing trace with hash -506938142, now seen corresponding path program 1 times [2020-10-28 00:25:59,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:59,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207409921] [2020-10-28 00:25:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:59,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:59,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:59,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:59,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:00,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:00,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:04,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:04,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 00:26:04,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:26:04,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:26:04,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:04,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:26:04,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:26:04,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:26:04,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:05,177 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:05,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:05,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:05,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:05,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:05,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:05,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:26:05,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:05,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:05,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:05,208 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 00:26:05,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207409921] [2020-10-28 00:26:05,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:05,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:26:05,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212825008] [2020-10-28 00:26:05,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:26:05,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:05,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:26:05,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:05,210 INFO L87 Difference]: Start difference. First operand 31303 states and 48419 transitions. Second operand 5 states. [2020-10-28 00:26:06,158 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:26:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:09,446 INFO L93 Difference]: Finished difference Result 91680 states and 141622 transitions. [2020-10-28 00:26:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:26:09,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-28 00:26:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:09,536 INFO L225 Difference]: With dead ends: 91680 [2020-10-28 00:26:09,537 INFO L226 Difference]: Without dead ends: 60398 [2020-10-28 00:26:09,570 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 00:26:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60398 states. [2020-10-28 00:26:13,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60398 to 60395. [2020-10-28 00:26:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60395 states. [2020-10-28 00:26:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60395 states to 60395 states and 92654 transitions. [2020-10-28 00:26:13,453 INFO L78 Accepts]: Start accepts. Automaton has 60395 states and 92654 transitions. Word has length 75 [2020-10-28 00:26:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:13,453 INFO L481 AbstractCegarLoop]: Abstraction has 60395 states and 92654 transitions. [2020-10-28 00:26:13,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:26:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 60395 states and 92654 transitions. [2020-10-28 00:26:13,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 00:26:13,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:13,454 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] [2020-10-28 00:26:13,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:26:13,455 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:13,455 INFO L82 PathProgramCache]: Analyzing trace with hash 845341347, now seen corresponding path program 1 times [2020-10-28 00:26:13,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:13,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291059823] [2020-10-28 00:26:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:13,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:13,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:13,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:13,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:13,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:13,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:18,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:18,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:18,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 00:26:18,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:26:18,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:26:18,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:18,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:18,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 00:26:18,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 00:26:18,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:18,853 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:18,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:18,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:18,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:18,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:18,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:18,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:26:18,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:18,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:18,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:18,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:18,880 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 00:26:18,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291059823] [2020-10-28 00:26:18,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:18,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:18,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846682866] [2020-10-28 00:26:18,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:18,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:18,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:18,882 INFO L87 Difference]: Start difference. First operand 60395 states and 92654 transitions. Second operand 4 states. [2020-10-28 00:26:19,790 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:26:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:24,421 INFO L93 Difference]: Finished difference Result 145259 states and 223934 transitions. [2020-10-28 00:26:24,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:24,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-28 00:26:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:24,545 INFO L225 Difference]: With dead ends: 145259 [2020-10-28 00:26:24,546 INFO L226 Difference]: Without dead ends: 85007 [2020-10-28 00:26:24,595 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 00:26:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85007 states. [2020-10-28 00:26:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85007 to 82294. [2020-10-28 00:26:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82294 states. [2020-10-28 00:26:30,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82294 states to 82294 states and 125382 transitions. [2020-10-28 00:26:30,032 INFO L78 Accepts]: Start accepts. Automaton has 82294 states and 125382 transitions. Word has length 76 [2020-10-28 00:26:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:30,033 INFO L481 AbstractCegarLoop]: Abstraction has 82294 states and 125382 transitions. [2020-10-28 00:26:30,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 82294 states and 125382 transitions. [2020-10-28 00:26:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 00:26:30,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:30,034 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] [2020-10-28 00:26:30,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:26:30,034 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:30,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1729764131, now seen corresponding path program 1 times [2020-10-28 00:26:30,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:30,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384388429] [2020-10-28 00:26:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:30,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:30,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:30,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:30,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:30,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:30,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:32,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:35,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 00:26:35,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:26:35,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:26:35,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:35,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:26:35,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 00:26:35,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:26:35,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:35,437 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:35,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:35,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:35,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:35,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:35,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:26:35,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:35,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:35,467 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 00:26:35,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384388429] [2020-10-28 00:26:35,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:35,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:26:35,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153475658] [2020-10-28 00:26:35,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:26:35,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:35,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:26:35,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:26:35,469 INFO L87 Difference]: Start difference. First operand 82294 states and 125382 transitions. Second operand 6 states. [2020-10-28 00:26:35,894 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:26:37,140 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:26:37,538 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:26:38,214 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:26:46,280 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:26:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:55,808 INFO L93 Difference]: Finished difference Result 369094 states and 564216 transitions. [2020-10-28 00:26:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:26:55,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-28 00:26:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:56,535 INFO L225 Difference]: With dead ends: 369094 [2020-10-28 00:26:56,536 INFO L226 Difference]: Without dead ends: 286955 [2020-10-28 00:26:56,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:26:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286955 states. [2020-10-28 00:27:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286955 to 152226. [2020-10-28 00:27:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152226 states. [2020-10-28 00:27:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152226 states to 152226 states and 231182 transitions. [2020-10-28 00:27:08,913 INFO L78 Accepts]: Start accepts. Automaton has 152226 states and 231182 transitions. Word has length 76 [2020-10-28 00:27:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:08,913 INFO L481 AbstractCegarLoop]: Abstraction has 152226 states and 231182 transitions. [2020-10-28 00:27:08,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:27:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 152226 states and 231182 transitions. [2020-10-28 00:27:08,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 00:27:08,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:08,915 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] [2020-10-28 00:27:08,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:27:08,915 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2023557378, now seen corresponding path program 1 times [2020-10-28 00:27:08,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:08,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575542314] [2020-10-28 00:27:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:08,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:08,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:09,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:09,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:09,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:09,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:11,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:13,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:13,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 00:27:13,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:13,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:27:13,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:27:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-28 00:27:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:27:13,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:14,360 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:14,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:14,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:14,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:14,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:14,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:14,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:27:14,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:14,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:14,403 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 00:27:14,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575542314] [2020-10-28 00:27:14,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:14,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:27:14,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621474651] [2020-10-28 00:27:14,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:27:14,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:14,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:27:14,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:14,405 INFO L87 Difference]: Start difference. First operand 152226 states and 231182 transitions. Second operand 5 states. [2020-10-28 00:27:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:29,267 INFO L93 Difference]: Finished difference Result 210285 states and 316355 transitions. [2020-10-28 00:27:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:27:29,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-28 00:27:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:29,831 INFO L225 Difference]: With dead ends: 210285 [2020-10-28 00:27:29,832 INFO L226 Difference]: Without dead ends: 210282 [2020-10-28 00:27:29,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:27:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210282 states. [2020-10-28 00:27:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210282 to 153618. [2020-10-28 00:27:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153618 states. [2020-10-28 00:27:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153618 states to 153618 states and 232454 transitions. [2020-10-28 00:27:41,960 INFO L78 Accepts]: Start accepts. Automaton has 153618 states and 232454 transitions. Word has length 77 [2020-10-28 00:27:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:41,961 INFO L481 AbstractCegarLoop]: Abstraction has 153618 states and 232454 transitions. [2020-10-28 00:27:41,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:27:41,961 INFO L276 IsEmpty]: Start isEmpty. Operand 153618 states and 232454 transitions. [2020-10-28 00:27:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 00:27:41,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:41,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:27:41,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:27:41,966 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:41,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:41,966 INFO L82 PathProgramCache]: Analyzing trace with hash -2115100311, now seen corresponding path program 1 times [2020-10-28 00:27:41,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:41,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189893187] [2020-10-28 00:27:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:42,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:46,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:46,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 00:27:46,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:27:46,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:27:46,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 00:27:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:27:46,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:47,387 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:47,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:47,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:47,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:47,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:47,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:47,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:27:47,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:47,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:47,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:47,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:47,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:47,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189893187] [2020-10-28 00:27:47,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:47,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:47,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854336026] [2020-10-28 00:27:47,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:47,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:47,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:47,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:47,425 INFO L87 Difference]: Start difference. First operand 153618 states and 232454 transitions. Second operand 4 states. [2020-10-28 00:27:49,492 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:27:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:58,700 INFO L93 Difference]: Finished difference Result 281362 states and 426479 transitions. [2020-10-28 00:27:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:58,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-28 00:27:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:58,947 INFO L225 Difference]: With dead ends: 281362 [2020-10-28 00:27:58,947 INFO L226 Difference]: Without dead ends: 127899 [2020-10-28 00:27:59,062 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 00:27:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127899 states.