/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/eca-rers2012/Problem03_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 15:46:57,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 15:46:57,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 15:46:57,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 15:46:57,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 15:46:57,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 15:46:57,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 15:46:57,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 15:46:57,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 15:46:57,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 15:46:57,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 15:46:57,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 15:46:57,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 15:46:57,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 15:46:57,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 15:46:57,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 15:46:57,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 15:46:57,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 15:46:57,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 15:46:57,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 15:46:57,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 15:46:57,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 15:46:57,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 15:46:57,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 15:46:57,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 15:46:57,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 15:46:57,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 15:46:57,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 15:46:57,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 15:46:57,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 15:46:57,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 15:46:57,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 15:46:57,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 15:46:57,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 15:46:57,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 15:46:57,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 15:46:57,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 15:46:57,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 15:46:57,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 15:46:57,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 15:46:57,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 15:46:57,659 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 [2020-10-27 15:46:57,689 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 15:46:57,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 15:46:57,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 15:46:57,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 15:46:57,694 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 15:46:57,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 15:46:57,694 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 15:46:57,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 15:46:57,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 15:46:57,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 15:46:57,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 15:46:57,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 15:46:57,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 15:46:57,697 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 15:46:57,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 15:46:57,697 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 15:46:57,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 15:46:57,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 15:46:57,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 15:46:57,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 15:46:57,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 15:46:57,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 15:46:57,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 15:46:57,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 15:46:57,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 15:46:57,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 15:46:57,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 15:46:57,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 15:46:57,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 15:46:57,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 15:46:58,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 15:46:58,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 15:46:58,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 15:46:58,201 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 15:46:58,202 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 15:46:58,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2020-10-27 15:46:58,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae3157741/12e6f7f6202b4ed9b1d01a6a0d2e89d2/FLAGd3edaa653 [2020-10-27 15:46:59,135 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 15:46:59,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2020-10-27 15:46:59,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae3157741/12e6f7f6202b4ed9b1d01a6a0d2e89d2/FLAGd3edaa653 [2020-10-27 15:46:59,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae3157741/12e6f7f6202b4ed9b1d01a6a0d2e89d2 [2020-10-27 15:46:59,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 15:46:59,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 15:46:59,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 15:46:59,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 15:46:59,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 15:46:59,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:46:59" (1/1) ... [2020-10-27 15:46:59,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4489d40b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:46:59, skipping insertion in model container [2020-10-27 15:46:59,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:46:59" (1/1) ... [2020-10-27 15:46:59,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 15:46:59,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 15:47:00,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:47:00,113 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 15:47:00,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:47:00,479 INFO L208 MainTranslator]: Completed translation [2020-10-27 15:47:00,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:47:00 WrapperNode [2020-10-27 15:47:00,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 15:47:00,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 15:47:00,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 15:47:00,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 15:47:00,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:47:00" (1/1) ... [2020-10-27 15:47:00,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:47:00" (1/1) ... [2020-10-27 15:47:00,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:47:00" (1/1) ... [2020-10-27 15:47:00,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:47:00" (1/1) ... [2020-10-27 15:47:00,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:47:00" (1/1) ... [2020-10-27 15:47:00,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:47:00" (1/1) ... [2020-10-27 15:47:00,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:47:00" (1/1) ... [2020-10-27 15:47:00,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 15:47:00,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 15:47:00,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 15:47:00,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 15:47:00,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:47:00" (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 [2020-10-27 15:47:00,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 15:47:00,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 15:47:00,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 15:47:00,794 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 15:47:00,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 15:47:00,794 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 15:47:00,794 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 15:47:00,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 15:47:00,794 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 15:47:00,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 15:47:00,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 15:47:00,795 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 15:47:00,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 15:47:00,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 15:47:00,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 15:47:00,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 15:47:00,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 15:47:00,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 15:47:00,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 15:47:03,756 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 15:47:03,756 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 15:47:03,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:47:03 BoogieIcfgContainer [2020-10-27 15:47:03,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 15:47:03,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 15:47:03,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 15:47:03,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 15:47:03,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:46:59" (1/3) ... [2020-10-27 15:47:03,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccf21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:47:03, skipping insertion in model container [2020-10-27 15:47:03,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:47:00" (2/3) ... [2020-10-27 15:47:03,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccf21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:47:03, skipping insertion in model container [2020-10-27 15:47:03,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:47:03" (3/3) ... [2020-10-27 15:47:03,767 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label43.c [2020-10-27 15:47:03,779 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 15:47:03,785 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 15:47:03,798 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 15:47:03,827 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 15:47:03,827 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 15:47:03,827 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 15:47:03,828 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 15:47:03,828 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 15:47:03,828 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 15:47:03,828 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 15:47:03,828 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 15:47:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-27 15:47:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 15:47:03,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:47:03,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:47:03,874 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:47:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:47:03,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1977011172, now seen corresponding path program 1 times [2020-10-27 15:47:03,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:47:03,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19324873] [2020-10-27 15:47:03,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:47:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:47:04,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:04,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:09,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:47:09,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 15:47:09,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:47:09,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4743 [2020-10-27 15:47:09,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:47:09,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 15:47:09,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 15:47:09,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 15:47:09,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 15:47:09,825 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-27 15:47:09,984 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 15:47:10,139 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 15:47:10,325 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 15:47:10,474 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 15:47:10,626 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 15:47:10,935 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-27 15:47:11,702 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:47:11,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:47:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:47:11,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:11,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:47:11,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:47:11,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:47:11,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 15:47:11,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:47:11,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:47:11,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:47:11,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 15:47:11,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:47:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:47:12,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19324873] [2020-10-27 15:47:12,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 15:47:12,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 15:47:12,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806223703] [2020-10-27 15:47:12,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 15:47:12,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:47:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 15:47:12,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 15:47:12,640 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-27 15:47:13,710 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 15:47:15,544 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-27 15:47:17,397 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-27 15:47:19,440 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 212 DAG size of output: 204 [2020-10-27 15:47:22,744 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 225 DAG size of output: 203 [2020-10-27 15:47:25,409 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 225 DAG size of output: 202 [2020-10-27 15:47:28,128 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 228 DAG size of output: 201 [2020-10-27 15:47:33,433 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 229 DAG size of output: 200 [2020-10-27 15:47:35,813 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 231 DAG size of output: 198 [2020-10-27 15:47:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:47:40,070 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-27 15:47:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 15:47:40,073 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 157 [2020-10-27 15:47:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:47:40,091 INFO L225 Difference]: With dead ends: 742 [2020-10-27 15:47:40,091 INFO L226 Difference]: Without dead ends: 365 [2020-10-27 15:47:40,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-27 15:47:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-27 15:47:40,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-27 15:47:40,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-27 15:47:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-27 15:47:40,182 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 157 [2020-10-27 15:47:40,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:47:40,183 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-27 15:47:40,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 15:47:40,183 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-27 15:47:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 15:47:40,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:47:40,189 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:47:40,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 15:47:40,190 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:47:40,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:47:40,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1096824911, now seen corresponding path program 1 times [2020-10-27 15:47:40,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:47:40,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397117865] [2020-10-27 15:47:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:47:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:47:40,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:40,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:42,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:44,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:47:44,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 15:47:44,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:47:44,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4477 [2020-10-27 15:47:44,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:47:44,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:47:44,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 15:47:44,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-27 15:47:44,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 15:47:45,504 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:47:45,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:47:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:47:45,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:45,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:47:45,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:47:45,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:47:45,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:47:45,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:47:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:47:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:47:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:47:45,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:47:45,697 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:47:45,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:47:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:47:45,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:45,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:47:45,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 15:47:45,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:47:45,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 15:47:45,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:47:45,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:47:45,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:47:45,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:47:45,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:47:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:47:45,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397117865] [2020-10-27 15:47:45,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:47:45,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:47:45,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970455750] [2020-10-27 15:47:45,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:47:45,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:47:45,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:47:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:47:45,810 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 5 states. [2020-10-27 15:47:46,308 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 15:47:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:47:50,228 INFO L93 Difference]: Finished difference Result 833 states and 1294 transitions. [2020-10-27 15:47:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:47:50,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-27 15:47:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:47:50,237 INFO L225 Difference]: With dead ends: 833 [2020-10-27 15:47:50,237 INFO L226 Difference]: Without dead ends: 589 [2020-10-27 15:47:50,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:47:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-27 15:47:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 588. [2020-10-27 15:47:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2020-10-27 15:47:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 846 transitions. [2020-10-27 15:47:50,292 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 846 transitions. Word has length 168 [2020-10-27 15:47:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:47:50,293 INFO L481 AbstractCegarLoop]: Abstraction has 588 states and 846 transitions. [2020-10-27 15:47:50,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:47:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 846 transitions. [2020-10-27 15:47:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-27 15:47:50,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:47:50,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:47:50,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 15:47:50,303 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:47:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:47:50,304 INFO L82 PathProgramCache]: Analyzing trace with hash -662724424, now seen corresponding path program 1 times [2020-10-27 15:47:50,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:47:50,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411795427] [2020-10-27 15:47:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:47:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:47:50,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:50,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:51,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:54,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:47:54,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 15:47:54,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:47:54,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3783 [2020-10-27 15:47:54,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:47:54,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:47:54,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 15:47:54,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-27 15:47:54,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:47:54,820 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:47:54,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:47:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:47:54,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:54,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:47:54,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:47:54,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:47:54,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 15:47:54,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:47:54,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:47:54,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:47:54,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:47:54,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 15:47:55,021 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:47:55,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:47:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:47:55,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:55,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:47:55,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 15:47:55,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:47:55,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 15:47:55,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:47:55,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:47:55,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:47:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:47:55,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 15:47:55,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 15:47:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:47:55,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:47:55,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:47:55,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 15:47:55,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:47:55,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 15:47:55,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:47:55,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:47:55,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:47:55,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 15:47:55,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:47:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 15:47:55,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411795427] [2020-10-27 15:47:55,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:47:55,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:47:55,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892370524] [2020-10-27 15:47:55,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:47:55,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:47:55,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:47:55,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:47:55,160 INFO L87 Difference]: Start difference. First operand 588 states and 846 transitions. Second operand 5 states. [2020-10-27 15:47:55,708 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 15:47:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:47:59,752 INFO L93 Difference]: Finished difference Result 1497 states and 2268 transitions. [2020-10-27 15:47:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:47:59,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 177 [2020-10-27 15:47:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:47:59,760 INFO L225 Difference]: With dead ends: 1497 [2020-10-27 15:47:59,760 INFO L226 Difference]: Without dead ends: 1030 [2020-10-27 15:47:59,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:47:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2020-10-27 15:47:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 1014. [2020-10-27 15:47:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1014 states. [2020-10-27 15:47:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1487 transitions. [2020-10-27 15:47:59,827 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1487 transitions. Word has length 177 [2020-10-27 15:47:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:47:59,829 INFO L481 AbstractCegarLoop]: Abstraction has 1014 states and 1487 transitions. [2020-10-27 15:47:59,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:47:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1487 transitions. [2020-10-27 15:47:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-27 15:47:59,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:47:59,836 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:47:59,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 15:47:59,836 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:47:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:47:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1546364963, now seen corresponding path program 1 times [2020-10-27 15:47:59,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:47:59,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790427647] [2020-10-27 15:47:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:47:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:47:59,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:00,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:00,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-27 15:48:00,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:00,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-27 15:48:00,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:00,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:48:00,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 15:48:00,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-27 15:48:00,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:01,085 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:48:01,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:48:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:01,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:01,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:01,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:48:01,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:01,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 15:48:01,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:01,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:48:01,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:01,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:48:01,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:01,273 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:48:01,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:48:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:01,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:01,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 15:48:01,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:01,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 15:48:01,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:01,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:48:01,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:01,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 15:48:01,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:48:01,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790427647] [2020-10-27 15:48:01,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:48:01,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:48:01,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65915449] [2020-10-27 15:48:01,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:48:01,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:48:01,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:48:01,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:48:01,391 INFO L87 Difference]: Start difference. First operand 1014 states and 1487 transitions. Second operand 5 states. [2020-10-27 15:48:02,177 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 15:48:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:48:06,578 INFO L93 Difference]: Finished difference Result 2746 states and 4181 transitions. [2020-10-27 15:48:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:48:06,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2020-10-27 15:48:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:48:06,592 INFO L225 Difference]: With dead ends: 2746 [2020-10-27 15:48:06,592 INFO L226 Difference]: Without dead ends: 1853 [2020-10-27 15:48:06,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:48:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2020-10-27 15:48:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1850. [2020-10-27 15:48:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1850 states. [2020-10-27 15:48:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2492 transitions. [2020-10-27 15:48:06,667 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2492 transitions. Word has length 178 [2020-10-27 15:48:06,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:48:06,668 INFO L481 AbstractCegarLoop]: Abstraction has 1850 states and 2492 transitions. [2020-10-27 15:48:06,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:48:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2492 transitions. [2020-10-27 15:48:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-27 15:48:06,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:48:06,675 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:48:06,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 15:48:06,676 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:48:06,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:48:06,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1307763636, now seen corresponding path program 1 times [2020-10-27 15:48:06,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:48:06,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552580976] [2020-10-27 15:48:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:48:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:06,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:06,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:07,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:09,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:09,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 15:48:09,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:48:09,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3074 [2020-10-27 15:48:09,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:09,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:48:09,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 15:48:09,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-27 15:48:09,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 15:48:10,365 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:48:10,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:48:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:10,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:10,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:10,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:48:10,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:10,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 15:48:10,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:48:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:48:10,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:10,552 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:48:10,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:48:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:10,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:10,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:10,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 15:48:10,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:10,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:48:10,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:10,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:48:10,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:10,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:48:10,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:10,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 15:48:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:10,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:10,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:10,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:48:10,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:10,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 15:48:10,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:10,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:48:10,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:10,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 15:48:10,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 15:48:10,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552580976] [2020-10-27 15:48:10,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:48:10,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:48:10,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068355852] [2020-10-27 15:48:10,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:48:10,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:48:10,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:48:10,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:48:10,694 INFO L87 Difference]: Start difference. First operand 1850 states and 2492 transitions. Second operand 5 states. [2020-10-27 15:48:11,416 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 15:48:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:48:15,962 INFO L93 Difference]: Finished difference Result 4418 states and 6226 transitions. [2020-10-27 15:48:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:48:15,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2020-10-27 15:48:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:48:15,988 INFO L225 Difference]: With dead ends: 4418 [2020-10-27 15:48:15,989 INFO L226 Difference]: Without dead ends: 2689 [2020-10-27 15:48:15,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:48:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2020-10-27 15:48:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2686. [2020-10-27 15:48:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2686 states. [2020-10-27 15:48:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 3744 transitions. [2020-10-27 15:48:16,103 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 3744 transitions. Word has length 187 [2020-10-27 15:48:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:48:16,104 INFO L481 AbstractCegarLoop]: Abstraction has 2686 states and 3744 transitions. [2020-10-27 15:48:16,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:48:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 3744 transitions. [2020-10-27 15:48:16,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-27 15:48:16,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:48:16,114 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:48:16,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 15:48:16,114 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:48:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:48:16,115 INFO L82 PathProgramCache]: Analyzing trace with hash 397039911, now seen corresponding path program 1 times [2020-10-27 15:48:16,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:48:16,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592603910] [2020-10-27 15:48:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:48:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:16,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:16,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:17,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:17,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:20,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:20,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-27 15:48:20,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 15:48:20,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4650 [2020-10-27 15:48:20,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:20,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:48:20,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 15:48:20,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-27 15:48:20,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 15:48:21,438 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:48:21,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:48:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:21,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:21,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:21,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:48:21,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:21,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:48:21,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:21,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:48:21,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:21,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:48:21,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:21,690 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:48:21,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:48:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:21,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:21,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:21,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 15:48:21,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:21,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 15:48:21,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:21,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:48:21,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:21,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:48:21,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:21,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 15:48:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:21,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:21,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:21,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 15:48:21,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:21,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-27 15:48:21,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:21,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:48:21,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:21,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 15:48:21,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 15:48:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 15:48:21,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592603910] [2020-10-27 15:48:21,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:48:21,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:48:21,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618305414] [2020-10-27 15:48:21,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:48:21,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:48:21,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:48:21,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:48:21,991 INFO L87 Difference]: Start difference. First operand 2686 states and 3744 transitions. Second operand 5 states. [2020-10-27 15:48:22,518 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 15:48:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:48:27,228 INFO L93 Difference]: Finished difference Result 7774 states and 11172 transitions. [2020-10-27 15:48:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:48:27,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 204 [2020-10-27 15:48:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:48:27,264 INFO L225 Difference]: With dead ends: 7774 [2020-10-27 15:48:27,264 INFO L226 Difference]: Without dead ends: 5209 [2020-10-27 15:48:27,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:48:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2020-10-27 15:48:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 5202. [2020-10-27 15:48:27,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5202 states. [2020-10-27 15:48:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5202 states to 5202 states and 7186 transitions. [2020-10-27 15:48:27,465 INFO L78 Accepts]: Start accepts. Automaton has 5202 states and 7186 transitions. Word has length 204 [2020-10-27 15:48:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:48:27,466 INFO L481 AbstractCegarLoop]: Abstraction has 5202 states and 7186 transitions. [2020-10-27 15:48:27,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:48:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5202 states and 7186 transitions. [2020-10-27 15:48:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-27 15:48:27,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:48:27,484 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:48:27,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 15:48:27,484 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:48:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:48:27,485 INFO L82 PathProgramCache]: Analyzing trace with hash 63971609, now seen corresponding path program 1 times [2020-10-27 15:48:27,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:48:27,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004330911] [2020-10-27 15:48:27,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:48:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:27,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:27,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:28,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:29,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:31,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:32,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:32,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-27 15:48:32,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 15:48:32,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-27 15:48:32,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:32,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:48:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 15:48:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 15:48:32,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:33,057 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:48:33,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:48:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:33,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:33,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:33,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:48:33,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:33,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 15:48:33,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:33,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:48:33,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:33,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:48:33,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:33,241 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:48:33,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:48:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:33,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:33,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:33,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 15:48:33,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:33,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:48:33,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:33,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:48:33,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:33,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:48:33,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:33,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 15:48:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:33,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:33,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:33,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 15:48:33,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:33,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 15:48:33,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:33,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:48:33,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:33,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 15:48:33,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:33,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 15:48:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:33,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:33,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:33,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 15:48:33,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:33,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 15:48:33,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:33,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:48:33,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 15:48:33,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 15:48:33,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 15:48:33,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004330911] [2020-10-27 15:48:33,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:48:33,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 15:48:33,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269653227] [2020-10-27 15:48:33,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 15:48:33,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:48:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 15:48:33,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:48:33,770 INFO L87 Difference]: Start difference. First operand 5202 states and 7186 transitions. Second operand 7 states. [2020-10-27 15:48:34,651 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 15:48:35,458 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 15:48:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:48:44,141 INFO L93 Difference]: Finished difference Result 20760 states and 31279 transitions. [2020-10-27 15:48:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 15:48:44,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 248 [2020-10-27 15:48:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:48:44,306 INFO L225 Difference]: With dead ends: 20760 [2020-10-27 15:48:44,306 INFO L226 Difference]: Without dead ends: 15679 [2020-10-27 15:48:44,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 15:48:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15679 states. [2020-10-27 15:48:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15679 to 15673. [2020-10-27 15:48:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15673 states. [2020-10-27 15:48:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15673 states to 15673 states and 23570 transitions. [2020-10-27 15:48:45,143 INFO L78 Accepts]: Start accepts. Automaton has 15673 states and 23570 transitions. Word has length 248 [2020-10-27 15:48:45,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:48:45,143 INFO L481 AbstractCegarLoop]: Abstraction has 15673 states and 23570 transitions. [2020-10-27 15:48:45,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 15:48:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 15673 states and 23570 transitions. [2020-10-27 15:48:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-27 15:48:45,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:48:45,234 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:48:45,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 15:48:45,235 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:48:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:48:45,236 INFO L82 PathProgramCache]: Analyzing trace with hash -740246763, now seen corresponding path program 1 times [2020-10-27 15:48:45,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:48:45,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238192632] [2020-10-27 15:48:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:48:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:45,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:45,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:45,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:46,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:49,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:50,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:50,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-27 15:48:50,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 15:48:50,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 15:48:50,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:48:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 15:48:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 15:48:50,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:50,830 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:48:50,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:48:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:50,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:50,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:50,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:48:50,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:50,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:48:50,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:50,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:48:50,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:50,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:48:50,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:51,029 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:48:51,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:48:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:51,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:51,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:51,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 15:48:51,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:51,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 15:48:51,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:51,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:48:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:48:51,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:51,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 15:48:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:51,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:51,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:51,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:48:51,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:51,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 15:48:51,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:51,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:48:51,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:48:51,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 15:48:51,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:51,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 15:48:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:51,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:51,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:48:51,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 15:48:51,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:48:51,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 15:48:51,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:48:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:48:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 15:48:51,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 15:48:51,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:48:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 15:48:51,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238192632] [2020-10-27 15:48:51,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:48:51,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 15:48:51,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739841715] [2020-10-27 15:48:51,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 15:48:51,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:48:51,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 15:48:51,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:48:51,496 INFO L87 Difference]: Start difference. First operand 15673 states and 23570 transitions. Second operand 7 states. [2020-10-27 15:48:52,042 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 15:48:56,020 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 15:48:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:48:58,291 INFO L93 Difference]: Finished difference Result 38044 states and 59089 transitions. [2020-10-27 15:48:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 15:48:58,292 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2020-10-27 15:48:58,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:48:58,436 INFO L225 Difference]: With dead ends: 38044 [2020-10-27 15:48:58,437 INFO L226 Difference]: Without dead ends: 22492 [2020-10-27 15:48:58,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-27 15:48:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22492 states. [2020-10-27 15:48:59,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22492 to 22464. [2020-10-27 15:48:59,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22464 states. [2020-10-27 15:48:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22464 states to 22464 states and 34551 transitions. [2020-10-27 15:48:59,389 INFO L78 Accepts]: Start accepts. Automaton has 22464 states and 34551 transitions. Word has length 250 [2020-10-27 15:48:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:48:59,390 INFO L481 AbstractCegarLoop]: Abstraction has 22464 states and 34551 transitions. [2020-10-27 15:48:59,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 15:48:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 22464 states and 34551 transitions. [2020-10-27 15:48:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-27 15:48:59,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:48:59,505 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:48:59,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 15:48:59,506 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:48:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:48:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1927093211, now seen corresponding path program 1 times [2020-10-27 15:48:59,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:48:59,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277255796] [2020-10-27 15:48:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:48:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:48:59,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:48:59,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:00,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:01,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:04,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:04,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:04,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-27 15:49:04,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 15:49:04,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 15:49:04,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:04,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:49:04,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 15:49:04,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 15:49:04,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:05,117 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:49:05,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:49:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:05,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:05,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:05,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:49:05,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:05,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:49:05,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:05,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:49:05,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:49:05,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:49:05,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:05,320 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:49:05,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:49:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:05,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:05,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:05,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 15:49:05,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:05,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:49:05,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:49:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:49:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:49:05,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:05,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 15:49:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:05,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:05,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:05,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:49:05,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:05,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 15:49:05,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:05,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:49:05,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:49:05,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 15:49:05,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:05,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 15:49:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:05,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:05,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:05,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 15:49:05,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:05,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-27 15:49:05,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:05,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:49:05,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 15:49:05,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 15:49:05,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:05,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-27 15:49:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:05,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:05,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:05,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 15:49:05,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:05,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 15:49:05,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:05,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:49:05,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 15:49:05,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:49:05,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 120 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-27 15:49:05,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277255796] [2020-10-27 15:49:05,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:49:05,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 15:49:05,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581532909] [2020-10-27 15:49:05,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 15:49:05,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:49:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 15:49:05,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:49:05,684 INFO L87 Difference]: Start difference. First operand 22464 states and 34551 transitions. Second operand 7 states. [2020-10-27 15:49:06,497 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 15:49:09,826 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 15:49:15,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:49:15,799 INFO L93 Difference]: Finished difference Result 63134 states and 116368 transitions. [2020-10-27 15:49:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 15:49:15,800 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 252 [2020-10-27 15:49:15,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:49:16,256 INFO L225 Difference]: With dead ends: 63134 [2020-10-27 15:49:16,257 INFO L226 Difference]: Without dead ends: 40791 [2020-10-27 15:49:16,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 15:49:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40791 states. [2020-10-27 15:49:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40791 to 39350. [2020-10-27 15:49:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39350 states. [2020-10-27 15:49:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39350 states to 39350 states and 61326 transitions. [2020-10-27 15:49:18,361 INFO L78 Accepts]: Start accepts. Automaton has 39350 states and 61326 transitions. Word has length 252 [2020-10-27 15:49:18,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:49:18,361 INFO L481 AbstractCegarLoop]: Abstraction has 39350 states and 61326 transitions. [2020-10-27 15:49:18,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 15:49:18,361 INFO L276 IsEmpty]: Start isEmpty. Operand 39350 states and 61326 transitions. [2020-10-27 15:49:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-27 15:49:18,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:49:18,642 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:49:18,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 15:49:18,643 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:49:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:49:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1771133485, now seen corresponding path program 1 times [2020-10-27 15:49:18,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:49:18,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972456095] [2020-10-27 15:49:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:49:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:18,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:18,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:21,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:22,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:23,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:23,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-27 15:49:23,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 15:49:23,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 15:49:23,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:49:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 15:49:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 15:49:23,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:24,218 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:49:24,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:49:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:24,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:24,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:24,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:49:24,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:24,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:49:24,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:24,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:49:24,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:49:24,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:49:24,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:24,412 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:49:24,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:49:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:24,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:24,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:24,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 15:49:24,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:24,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:49:24,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:49:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:49:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:49:24,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:24,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 15:49:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:24,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:24,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:24,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 15:49:24,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:24,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 15:49:24,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:49:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:49:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 15:49:24,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:24,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 15:49:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:24,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:24,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:24,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 15:49:24,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:24,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 15:49:24,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:24,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:49:24,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 15:49:24,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 15:49:24,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 15:49:24,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972456095] [2020-10-27 15:49:24,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:49:24,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 15:49:24,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221367681] [2020-10-27 15:49:24,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 15:49:24,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:49:24,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 15:49:24,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 15:49:24,883 INFO L87 Difference]: Start difference. First operand 39350 states and 61326 transitions. Second operand 8 states. [2020-10-27 15:49:25,355 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 15:49:26,465 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 15:49:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:49:31,286 INFO L93 Difference]: Finished difference Result 78301 states and 127662 transitions. [2020-10-27 15:49:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 15:49:31,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 254 [2020-10-27 15:49:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:49:31,535 INFO L225 Difference]: With dead ends: 78301 [2020-10-27 15:49:31,535 INFO L226 Difference]: Without dead ends: 40033 [2020-10-27 15:49:31,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 15:49:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40033 states. [2020-10-27 15:49:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40033 to 39620. [2020-10-27 15:49:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39620 states. [2020-10-27 15:49:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39620 states to 39620 states and 58136 transitions. [2020-10-27 15:49:33,162 INFO L78 Accepts]: Start accepts. Automaton has 39620 states and 58136 transitions. Word has length 254 [2020-10-27 15:49:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:49:33,163 INFO L481 AbstractCegarLoop]: Abstraction has 39620 states and 58136 transitions. [2020-10-27 15:49:33,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 15:49:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 39620 states and 58136 transitions. [2020-10-27 15:49:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-27 15:49:33,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:49:33,286 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:49:33,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 15:49:33,286 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:49:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:49:33,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1815874343, now seen corresponding path program 1 times [2020-10-27 15:49:33,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:49:33,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935688145] [2020-10-27 15:49:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:49:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:33,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:33,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:33,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:34,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:37,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:37,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-27 15:49:37,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 15:49:37,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4108 [2020-10-27 15:49:37,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:49:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 15:49:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 15:49:37,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:37,910 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:49:37,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:49:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:37,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:37,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:37,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:49:37,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:37,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 15:49:37,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:37,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:49:37,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:49:37,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:49:37,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:38,113 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:49:38,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:49:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:38,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:38,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:38,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 15:49:38,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:38,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 15:49:38,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:38,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:49:38,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:49:38,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 15:49:38,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:38,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 15:49:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:38,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:38,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:38,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 15:49:38,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:38,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 15:49:38,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:38,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:49:38,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 15:49:38,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 15:49:38,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:38,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-27 15:49:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:38,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:38,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:38,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 15:49:38,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:38,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 15:49:38,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:49:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 15:49:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:49:38,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 119 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 15:49:38,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935688145] [2020-10-27 15:49:38,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:49:38,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 15:49:38,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25021346] [2020-10-27 15:49:38,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 15:49:38,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:49:38,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 15:49:38,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:49:38,518 INFO L87 Difference]: Start difference. First operand 39620 states and 58136 transitions. Second operand 7 states. [2020-10-27 15:49:39,034 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 15:49:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:49:44,888 INFO L93 Difference]: Finished difference Result 113414 states and 168476 transitions. [2020-10-27 15:49:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 15:49:44,889 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 265 [2020-10-27 15:49:44,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:49:45,276 INFO L225 Difference]: With dead ends: 113414 [2020-10-27 15:49:45,276 INFO L226 Difference]: Without dead ends: 74928 [2020-10-27 15:49:45,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-27 15:49:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74928 states. [2020-10-27 15:49:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74928 to 74923. [2020-10-27 15:49:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74923 states. [2020-10-27 15:49:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74923 states to 74923 states and 111723 transitions. [2020-10-27 15:49:48,729 INFO L78 Accepts]: Start accepts. Automaton has 74923 states and 111723 transitions. Word has length 265 [2020-10-27 15:49:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:49:48,730 INFO L481 AbstractCegarLoop]: Abstraction has 74923 states and 111723 transitions. [2020-10-27 15:49:48,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 15:49:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 74923 states and 111723 transitions. [2020-10-27 15:49:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-27 15:49:48,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:49:48,892 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:49:48,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 15:49:48,892 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:49:48,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:49:48,893 INFO L82 PathProgramCache]: Analyzing trace with hash -620684891, now seen corresponding path program 1 times [2020-10-27 15:49:48,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:49:48,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196985598] [2020-10-27 15:49:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:49:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:48,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:49,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:49,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:53,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:53,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-27 15:49:53,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:49:53,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 15:49:53,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:53,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:49:53,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-27 15:49:53,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 15:49:53,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:54,466 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:49:54,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:49:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:54,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:54,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:54,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:49:54,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:54,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:49:54,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:54,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:49:54,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:49:54,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:49:54,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:54,670 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:49:54,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:49:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:54,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:54,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:54,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 15:49:54,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:54,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 15:49:54,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:54,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:49:54,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:49:54,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:49:54,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:54,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 15:49:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:54,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:54,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:54,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 15:49:54,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:54,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 15:49:54,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:54,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:49:54,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:49:54,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 15:49:54,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:54,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-27 15:49:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:49:54,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:49:54,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:49:54,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 15:49:54,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:49:54,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 15:49:54,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:49:54,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:49:54,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 15:49:54,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 15:49:54,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:49:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-27 15:49:55,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196985598] [2020-10-27 15:49:55,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:49:55,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 15:49:55,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975330661] [2020-10-27 15:49:55,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 15:49:55,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:49:55,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 15:49:55,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:49:55,143 INFO L87 Difference]: Start difference. First operand 74923 states and 111723 transitions. Second operand 7 states. [2020-10-27 15:49:56,228 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 15:49:57,737 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 15:50:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:50:06,339 INFO L93 Difference]: Finished difference Result 178773 states and 319096 transitions. [2020-10-27 15:50:06,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 15:50:06,341 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 265 [2020-10-27 15:50:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:50:07,407 INFO L225 Difference]: With dead ends: 178773 [2020-10-27 15:50:07,407 INFO L226 Difference]: Without dead ends: 104990 [2020-10-27 15:50:07,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 15:50:07,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104990 states. [2020-10-27 15:50:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104990 to 99666. [2020-10-27 15:50:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99666 states. [2020-10-27 15:50:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99666 states to 99666 states and 142256 transitions. [2020-10-27 15:50:12,482 INFO L78 Accepts]: Start accepts. Automaton has 99666 states and 142256 transitions. Word has length 265 [2020-10-27 15:50:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:50:12,482 INFO L481 AbstractCegarLoop]: Abstraction has 99666 states and 142256 transitions. [2020-10-27 15:50:12,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 15:50:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 99666 states and 142256 transitions. [2020-10-27 15:50:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-27 15:50:12,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:50:12,680 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:50:12,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 15:50:12,680 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:50:12,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:50:12,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1585704766, now seen corresponding path program 1 times [2020-10-27 15:50:12,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:50:12,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357395109] [2020-10-27 15:50:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:50:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:50:12,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:50:13,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:50:13,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:50:17,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:50:17,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-27 15:50:17,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:50:17,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5121 [2020-10-27 15:50:17,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:50:17,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:50:17,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 15:50:17,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 15:50:17,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:50:18,340 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 15:50:18,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:50:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:50:18,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:50:18,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:50:18,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:50:18,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:50:18,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:50:18,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:50:18,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:50:18,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:50:18,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:50:18,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:50:18,549 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 15:50:18,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:50:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:50:18,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:50:18,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:50:18,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 15:50:18,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:50:18,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 15:50:18,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:50:18,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:50:18,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:50:18,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:50:18,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:50:18,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 15:50:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:50:18,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:50:18,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:50:18,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 15:50:18,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:50:18,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 15:50:18,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:50:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:50:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:50:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 15:50:18,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:50:18,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-27 15:50:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:50:18,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:50:18,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:50:18,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 15:50:18,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:50:18,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 15:50:18,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:50:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:50:18,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 15:50:18,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 15:50:18,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:50:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-27 15:50:19,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357395109] [2020-10-27 15:50:19,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:50:19,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 15:50:19,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192338035] [2020-10-27 15:50:19,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 15:50:19,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:50:19,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 15:50:19,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:50:19,237 INFO L87 Difference]: Start difference. First operand 99666 states and 142256 transitions. Second operand 7 states.