/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=SHALLOWEST --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_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:47:59,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:47:59,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:47:59,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:47:59,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:47:59,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:47:59,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:47:59,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:47:59,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:47:59,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:47:59,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:47:59,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:47:59,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:47:59,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:47:59,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:47:59,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:47:59,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:47:59,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:47:59,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:47:59,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:47:59,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:47:59,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:47:59,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:47:59,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:47:59,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:47:59,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:47:59,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:47:59,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:47:59,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:47:59,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:47:59,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:47:59,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:47:59,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:47:59,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:47:59,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:47:59,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:47:59,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:47:59,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:47:59,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:47:59,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:47:59,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:47:59,882 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 [2020-10-26 20:47:59,912 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:47:59,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:47:59,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:47:59,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:47:59,914 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:47:59,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:47:59,915 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:47:59,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:47:59,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:47:59,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:47:59,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:47:59,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:47:59,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:47:59,916 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:47:59,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:47:59,916 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:47:59,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:47:59,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:47:59,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:47:59,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:47:59,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:47:59,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:47:59,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:47:59,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:47:59,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:47:59,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:47:59,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:47:59,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:47:59,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:47:59,919 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:48:00,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:48:00,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:48:00,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:48:00,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:48:00,306 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:48:00,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label28.c [2020-10-26 20:48:00,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2df3ad06b/3d8f1fd8306c44689f2c906cf93fddab/FLAG0dfafe93a [2020-10-26 20:48:01,222 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:48:01,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label28.c [2020-10-26 20:48:01,245 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2df3ad06b/3d8f1fd8306c44689f2c906cf93fddab/FLAG0dfafe93a [2020-10-26 20:48:01,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2df3ad06b/3d8f1fd8306c44689f2c906cf93fddab [2020-10-26 20:48:01,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:48:01,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:48:01,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:01,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:48:01,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:48:01,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:01" (1/1) ... [2020-10-26 20:48:01,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108178cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:01, skipping insertion in model container [2020-10-26 20:48:01,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:01" (1/1) ... [2020-10-26 20:48:01,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:48:01,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:48:02,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:02,182 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:48:02,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:02,442 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:48:02,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:02 WrapperNode [2020-10-26 20:48:02,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:02,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:48:02,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:48:02,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:48:02,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:02" (1/1) ... [2020-10-26 20:48:02,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:02" (1/1) ... [2020-10-26 20:48:02,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:02" (1/1) ... [2020-10-26 20:48:02,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:02" (1/1) ... [2020-10-26 20:48:02,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:02" (1/1) ... [2020-10-26 20:48:02,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:02" (1/1) ... [2020-10-26 20:48:02,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:02" (1/1) ... [2020-10-26 20:48:02,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:48:02,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:48:02,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:48:02,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:48:02,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:02" (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 [2020-10-26 20:48:02,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:48:02,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:48:02,750 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:48:02,750 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:48:02,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:48:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:48:02,751 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:48:02,751 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:48:02,751 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:48:02,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:48:02,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:48:02,751 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:48:02,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:48:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:48:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:48:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:48:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:48:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:48:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:48:05,257 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:48:05,257 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:48:05,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:05 BoogieIcfgContainer [2020-10-26 20:48:05,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:48:05,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:48:05,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:48:05,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:48:05,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:48:01" (1/3) ... [2020-10-26 20:48:05,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efd4bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:05, skipping insertion in model container [2020-10-26 20:48:05,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:02" (2/3) ... [2020-10-26 20:48:05,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efd4bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:05, skipping insertion in model container [2020-10-26 20:48:05,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:05" (3/3) ... [2020-10-26 20:48:05,268 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label28.c [2020-10-26 20:48:05,280 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:48:05,286 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:48:05,299 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:48:05,329 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:48:05,329 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:48:05,329 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:48:05,330 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:48:05,330 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:48:05,330 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:48:05,330 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:48:05,330 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:48:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:48:05,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-26 20:48:05,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:05,372 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, 1, 1] [2020-10-26 20:48:05,373 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:05,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1540663388, now seen corresponding path program 1 times [2020-10-26 20:48:05,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:05,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795984611] [2020-10-26 20:48:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:06,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:06,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:09,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:09,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-26 20:48:09,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:09,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3883 [2020-10-26 20:48:09,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:09,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:48:09,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:09,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:48:09,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:48:10,533 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-26 20:48:10,670 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 20:48:10,806 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 20:48:10,951 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 20:48:11,089 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 20:48:11,525 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-26 20:48:11,781 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:11,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:11,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:11,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:11,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:11,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:11,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:48:11,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:11,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:11,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:11,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:11,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:48:12,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795984611] [2020-10-26 20:48:12,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:48:12,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:48:12,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381596562] [2020-10-26 20:48:12,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:48:12,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:12,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:48:12,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:48:12,524 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:48:13,061 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:48:14,042 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 196 [2020-10-26 20:48:15,052 WARN L193 SmtUtils]: Spent 941.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 196 [2020-10-26 20:48:16,081 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 204 [2020-10-26 20:48:17,830 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 225 DAG size of output: 203 [2020-10-26 20:48:19,683 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 225 DAG size of output: 202 [2020-10-26 20:48:21,728 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 228 DAG size of output: 201 [2020-10-26 20:48:25,497 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 229 DAG size of output: 200 [2020-10-26 20:48:27,339 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 235 DAG size of output: 199 [2020-10-26 20:48:30,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:30,352 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:48:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:48:30,354 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 159 [2020-10-26 20:48:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:30,371 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:48:30,371 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:48:30,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:48:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:48:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:48:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:48:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:48:30,461 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 159 [2020-10-26 20:48:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:30,462 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:48:30,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:48:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:48:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-26 20:48:30,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:30,477 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, 1, 1] [2020-10-26 20:48:30,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:48:30,478 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:30,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1773280023, now seen corresponding path program 1 times [2020-10-26 20:48:30,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:30,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121416957] [2020-10-26 20:48:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:30,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:31,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:32,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:34,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:34,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-26 20:48:34,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:48:34,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4346 [2020-10-26 20:48:34,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:34,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:48:34,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:34,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-26 20:48:34,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:35,351 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:35,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:35,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:35,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:35,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:35,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:35,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:48:35,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:35,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:35,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:35,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:35,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:35,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:35,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:48:35,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:35,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:48:35,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:35,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:35,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:35,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:48:35,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:48:35,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121416957] [2020-10-26 20:48:35,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:35,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:48:35,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406540272] [2020-10-26 20:48:35,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:48:35,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:35,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:48:35,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:35,610 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 7 states. [2020-10-26 20:48:35,874 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:36,282 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:40,934 INFO L93 Difference]: Finished difference Result 1046 states and 1658 transitions. [2020-10-26 20:48:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:48:40,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2020-10-26 20:48:40,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:40,947 INFO L225 Difference]: With dead ends: 1046 [2020-10-26 20:48:40,947 INFO L226 Difference]: Without dead ends: 802 [2020-10-26 20:48:40,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:48:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2020-10-26 20:48:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 794. [2020-10-26 20:48:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-10-26 20:48:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1123 transitions. [2020-10-26 20:48:41,012 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1123 transitions. Word has length 170 [2020-10-26 20:48:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:41,012 INFO L481 AbstractCegarLoop]: Abstraction has 794 states and 1123 transitions. [2020-10-26 20:48:41,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:48:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1123 transitions. [2020-10-26 20:48:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-26 20:48:41,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:41,018 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, 1, 1] [2020-10-26 20:48:41,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:48:41,019 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:41,020 INFO L82 PathProgramCache]: Analyzing trace with hash -10426901, now seen corresponding path program 1 times [2020-10-26 20:48:41,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:41,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942989179] [2020-10-26 20:48:41,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:41,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:41,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:41,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 20:48:41,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:41,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-26 20:48:41,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:41,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:41,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:48:41,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-26 20:48:41,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:42,082 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:42,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:42,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:42,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:42,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:42,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:48:42,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:48:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:48:42,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:42,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:42,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:42,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:42,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:48:42,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:42,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 20:48:42,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:42,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:48:42,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:48:42,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942989179] [2020-10-26 20:48:42,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:42,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:48:42,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523071049] [2020-10-26 20:48:42,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:48:42,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:42,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:48:42,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:48:42,384 INFO L87 Difference]: Start difference. First operand 794 states and 1123 transitions. Second operand 5 states. [2020-10-26 20:48:42,786 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:45,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:45,914 INFO L93 Difference]: Finished difference Result 2123 states and 3129 transitions. [2020-10-26 20:48:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:48:45,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2020-10-26 20:48:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:45,925 INFO L225 Difference]: With dead ends: 2123 [2020-10-26 20:48:45,926 INFO L226 Difference]: Without dead ends: 1450 [2020-10-26 20:48:45,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:48:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2020-10-26 20:48:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1436. [2020-10-26 20:48:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2020-10-26 20:48:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2037 transitions. [2020-10-26 20:48:45,996 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2037 transitions. Word has length 180 [2020-10-26 20:48:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:45,997 INFO L481 AbstractCegarLoop]: Abstraction has 1436 states and 2037 transitions. [2020-10-26 20:48:45,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:48:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2037 transitions. [2020-10-26 20:48:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 20:48:46,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:46,004 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:48:46,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:48:46,005 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:46,005 INFO L82 PathProgramCache]: Analyzing trace with hash -114411780, now seen corresponding path program 1 times [2020-10-26 20:48:46,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:46,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887767252] [2020-10-26 20:48:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:46,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:46,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:47,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:50,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:50,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:50,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-26 20:48:50,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:48:50,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4609 [2020-10-26 20:48:50,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:50,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:48:50,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:50,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:48:50,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:48:50,986 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:50,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:51,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:51,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:51,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:51,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:51,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:48:51,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:51,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:51,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:51,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:51,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:51,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:51,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:51,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:51,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:51,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:48:51,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:51,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 20:48:51,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:48:51,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:51,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:48:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:51,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:51,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:51,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:48:51,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:51,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 20:48:51,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:48:51,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:48:51,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887767252] [2020-10-26 20:48:51,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:51,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:48:51,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464789108] [2020-10-26 20:48:51,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:48:51,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:51,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:48:51,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:48:51,479 INFO L87 Difference]: Start difference. First operand 1436 states and 2037 transitions. Second operand 8 states. [2020-10-26 20:48:51,826 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:54,079 INFO L93 Difference]: Finished difference Result 2728 states and 3928 transitions. [2020-10-26 20:48:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:48:54,079 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 197 [2020-10-26 20:48:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:54,090 INFO L225 Difference]: With dead ends: 2728 [2020-10-26 20:48:54,090 INFO L226 Difference]: Without dead ends: 1413 [2020-10-26 20:48:54,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:48:54,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2020-10-26 20:48:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1413. [2020-10-26 20:48:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1413 states. [2020-10-26 20:48:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1968 transitions. [2020-10-26 20:48:54,163 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1968 transitions. Word has length 197 [2020-10-26 20:48:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:54,164 INFO L481 AbstractCegarLoop]: Abstraction has 1413 states and 1968 transitions. [2020-10-26 20:48:54,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:48:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1968 transitions. [2020-10-26 20:48:54,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 20:48:54,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:54,172 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:54,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:48:54,173 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:54,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1889432807, now seen corresponding path program 1 times [2020-10-26 20:48:54,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:54,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128280264] [2020-10-26 20:48:54,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:54,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:54,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:55,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:55,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 20:48:55,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:55,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1633 [2020-10-26 20:48:55,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:55,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:55,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:48:55,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 20:48:55,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:56,320 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:56,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:56,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:56,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:56,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:56,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:56,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:48:56,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:56,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:48:56,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:56,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:48:56,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:56,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:56,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:56,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:56,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:48:56,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:56,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 20:48:56,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:56,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:56,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:56,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:48:56,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:56,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:48:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:56,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:56,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:56,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:48:56,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:56,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 20:48:56,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:56,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:56,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:56,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:48:56,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:48:56,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128280264] [2020-10-26 20:48:56,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:56,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:48:56,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558091945] [2020-10-26 20:48:56,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:48:56,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:48:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:48:56,859 INFO L87 Difference]: Start difference. First operand 1413 states and 1968 transitions. Second operand 8 states. [2020-10-26 20:48:57,139 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:48:57,667 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:48:59,093 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:49:02,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:02,650 INFO L93 Difference]: Finished difference Result 3603 states and 5083 transitions. [2020-10-26 20:49:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 20:49:02,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 218 [2020-10-26 20:49:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:02,666 INFO L225 Difference]: With dead ends: 3603 [2020-10-26 20:49:02,666 INFO L226 Difference]: Without dead ends: 2311 [2020-10-26 20:49:02,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:49:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2020-10-26 20:49:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 2283. [2020-10-26 20:49:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-10-26 20:49:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 2989 transitions. [2020-10-26 20:49:02,770 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 2989 transitions. Word has length 218 [2020-10-26 20:49:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:02,770 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 2989 transitions. [2020-10-26 20:49:02,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 2989 transitions. [2020-10-26 20:49:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-26 20:49:02,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:02,780 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, 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] [2020-10-26 20:49:02,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:49:02,781 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:02,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1187647234, now seen corresponding path program 1 times [2020-10-26 20:49:02,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:02,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177220601] [2020-10-26 20:49:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:02,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:03,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:05,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:05,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-26 20:49:05,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:05,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2419 [2020-10-26 20:49:05,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:05,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:05,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:05,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 20:49:05,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:05,566 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:05,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:05,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:05,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:05,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:05,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:05,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:49:05,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:05,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:05,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:05,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:05,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:05,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:05,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:05,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:49:05,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:05,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:05,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:05,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:05,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:05,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:05,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:06,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:06,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:49:06,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:06,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-26 20:49:06,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:06,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:06,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:06,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:49:06,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:49:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 64 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:49:06,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177220601] [2020-10-26 20:49:06,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:06,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:06,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418181626] [2020-10-26 20:49:06,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:06,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:06,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:06,354 INFO L87 Difference]: Start difference. First operand 2283 states and 2989 transitions. Second operand 8 states. [2020-10-26 20:49:06,641 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:49:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:10,167 INFO L93 Difference]: Finished difference Result 6689 states and 9173 transitions. [2020-10-26 20:49:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:49:10,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 228 [2020-10-26 20:49:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:10,206 INFO L225 Difference]: With dead ends: 6689 [2020-10-26 20:49:10,206 INFO L226 Difference]: Without dead ends: 4527 [2020-10-26 20:49:10,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:49:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2020-10-26 20:49:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 4440. [2020-10-26 20:49:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4440 states. [2020-10-26 20:49:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4440 states to 4440 states and 5927 transitions. [2020-10-26 20:49:10,467 INFO L78 Accepts]: Start accepts. Automaton has 4440 states and 5927 transitions. Word has length 228 [2020-10-26 20:49:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:10,467 INFO L481 AbstractCegarLoop]: Abstraction has 4440 states and 5927 transitions. [2020-10-26 20:49:10,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 4440 states and 5927 transitions. [2020-10-26 20:49:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-26 20:49:10,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:10,482 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 20:49:10,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:49:10,482 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash 286648534, now seen corresponding path program 1 times [2020-10-26 20:49:10,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:10,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431618694] [2020-10-26 20:49:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:10,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:11,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:12,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:12,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-26 20:49:12,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:12,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1919 [2020-10-26 20:49:12,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:12,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:12,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:49:12,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-26 20:49:12,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:12,911 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:12,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:12,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:12,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:12,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:12,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:12,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:49:12,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:12,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:12,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:12,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:12,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:13,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:13,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:13,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:13,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:13,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:13,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:49:13,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:49:13,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:13,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:13,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:13,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:13,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:49:13,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:13,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-26 20:49:13,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:49:13,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:49:13,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431618694] [2020-10-26 20:49:13,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:13,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:49:13,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30627285] [2020-10-26 20:49:13,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:49:13,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:13,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:49:13,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:49:13,610 INFO L87 Difference]: Start difference. First operand 4440 states and 5927 transitions. Second operand 6 states. [2020-10-26 20:49:14,014 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:17,262 INFO L93 Difference]: Finished difference Result 12933 states and 18259 transitions. [2020-10-26 20:49:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:49:17,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 238 [2020-10-26 20:49:17,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:17,317 INFO L225 Difference]: With dead ends: 12933 [2020-10-26 20:49:17,318 INFO L226 Difference]: Without dead ends: 8614 [2020-10-26 20:49:17,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:17,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8614 states. [2020-10-26 20:49:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8614 to 8510. [2020-10-26 20:49:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8510 states. [2020-10-26 20:49:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 11024 transitions. [2020-10-26 20:49:17,616 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 11024 transitions. Word has length 238 [2020-10-26 20:49:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:17,617 INFO L481 AbstractCegarLoop]: Abstraction has 8510 states and 11024 transitions. [2020-10-26 20:49:17,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:49:17,617 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 11024 transitions. [2020-10-26 20:49:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-26 20:49:17,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:17,639 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1] [2020-10-26 20:49:17,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:49:17,639 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:17,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:17,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1079392011, now seen corresponding path program 1 times [2020-10-26 20:49:17,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:17,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526913550] [2020-10-26 20:49:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:17,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:17,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:18,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:19,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:22,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:22,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-26 20:49:22,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:22,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 20:49:22,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:22,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:22,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:22,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:49:22,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:23,013 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:23,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:23,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:23,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:23,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:23,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:23,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:49:23,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:23,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:23,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:23,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:23,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:23,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:23,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:23,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:23,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:23,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:23,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:49:23,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:23,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:23,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:23,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:23,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:23,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:23,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:23,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:23,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:49:23,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:23,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:49:23,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:23,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:23,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:23,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:49:23,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:23,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 20:49:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:23,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:23,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:23,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:49:23,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:23,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-26 20:49:23,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-26 20:49:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:23,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 81 proven. 19 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:49:23,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526913550] [2020-10-26 20:49:23,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:23,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:23,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669019913] [2020-10-26 20:49:23,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:23,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:23,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:23,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:23,611 INFO L87 Difference]: Start difference. First operand 8510 states and 11024 transitions. Second operand 7 states. [2020-10-26 20:49:23,845 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:25,000 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:27,382 INFO L93 Difference]: Finished difference Result 23642 states and 31967 transitions. [2020-10-26 20:49:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:49:27,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 244 [2020-10-26 20:49:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:27,480 INFO L225 Difference]: With dead ends: 23642 [2020-10-26 20:49:27,480 INFO L226 Difference]: Without dead ends: 15253 [2020-10-26 20:49:27,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:49:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15253 states. [2020-10-26 20:49:28,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15253 to 15114. [2020-10-26 20:49:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15114 states. [2020-10-26 20:49:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15114 states to 15114 states and 19562 transitions. [2020-10-26 20:49:28,053 INFO L78 Accepts]: Start accepts. Automaton has 15114 states and 19562 transitions. Word has length 244 [2020-10-26 20:49:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:28,053 INFO L481 AbstractCegarLoop]: Abstraction has 15114 states and 19562 transitions. [2020-10-26 20:49:28,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 15114 states and 19562 transitions. [2020-10-26 20:49:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-26 20:49:28,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:28,091 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 20:49:28,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:49:28,092 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:28,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1587193062, now seen corresponding path program 1 times [2020-10-26 20:49:28,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:28,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155572485] [2020-10-26 20:49:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:28,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:28,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:30,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:30,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 276 [2020-10-26 20:49:30,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:30,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1948 [2020-10-26 20:49:30,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:30,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:30,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:49:30,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:49:30,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:30,451 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:30,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:30,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:30,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:30,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:30,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:30,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:49:30,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:30,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:30,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:30,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:30,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:30,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:30,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:30,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:30,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:30,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:30,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:49:30,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:30,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:49:30,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:30,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:30,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:30,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:30,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:49:30,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:30,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-26 20:49:30,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:30,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:30,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:49:30,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:49:31,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155572485] [2020-10-26 20:49:31,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:31,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:31,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344155411] [2020-10-26 20:49:31,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:31,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:31,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:31,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:31,007 INFO L87 Difference]: Start difference. First operand 15114 states and 19562 transitions. Second operand 7 states. [2020-10-26 20:49:31,452 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:49:32,654 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:37,265 INFO L93 Difference]: Finished difference Result 37612 states and 52455 transitions. [2020-10-26 20:49:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:49:37,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 262 [2020-10-26 20:49:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:37,392 INFO L225 Difference]: With dead ends: 37612 [2020-10-26 20:49:37,393 INFO L226 Difference]: Without dead ends: 23037 [2020-10-26 20:49:37,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:49:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23037 states. [2020-10-26 20:49:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23037 to 22342. [2020-10-26 20:49:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22342 states. [2020-10-26 20:49:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22342 states to 22342 states and 29064 transitions. [2020-10-26 20:49:38,120 INFO L78 Accepts]: Start accepts. Automaton has 22342 states and 29064 transitions. Word has length 262 [2020-10-26 20:49:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:38,120 INFO L481 AbstractCegarLoop]: Abstraction has 22342 states and 29064 transitions. [2020-10-26 20:49:38,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 22342 states and 29064 transitions. [2020-10-26 20:49:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 20:49:38,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:38,180 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, 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] [2020-10-26 20:49:38,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:49:38,180 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:38,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1965671798, now seen corresponding path program 1 times [2020-10-26 20:49:38,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:38,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966362916] [2020-10-26 20:49:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:38,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:38,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:39,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-26 20:49:42,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:42,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3673 [2020-10-26 20:49:42,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:49:42,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:42,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 20:49:42,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:42,319 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:42,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:42,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:42,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:42,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:49:42,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:42,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:42,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:42,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:42,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:42,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:42,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:42,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 20:49:42,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:42,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:42,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:49:42,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:42,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:42,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 20:49:42,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:42,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 20:49:42,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:49:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:49:42,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:42,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 20:49:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:42,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:49:42,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:42,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-26 20:49:42,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:49:42,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 106 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 20:49:43,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966362916] [2020-10-26 20:49:43,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:43,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:49:43,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572418790] [2020-10-26 20:49:43,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 20:49:43,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 20:49:43,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:49:43,248 INFO L87 Difference]: Start difference. First operand 22342 states and 29064 transitions. Second operand 11 states. [2020-10-26 20:49:43,553 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:49:44,023 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:46,406 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:49:46,865 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:49:49,809 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:49:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:51,394 INFO L93 Difference]: Finished difference Result 75864 states and 105189 transitions. [2020-10-26 20:49:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 20:49:51,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 272 [2020-10-26 20:49:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:51,667 INFO L225 Difference]: With dead ends: 75864 [2020-10-26 20:49:51,667 INFO L226 Difference]: Without dead ends: 55014 [2020-10-26 20:49:51,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 20:49:51,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55014 states. [2020-10-26 20:49:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55014 to 54267. [2020-10-26 20:49:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54267 states. [2020-10-26 20:49:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54267 states to 54267 states and 69450 transitions. [2020-10-26 20:49:54,043 INFO L78 Accepts]: Start accepts. Automaton has 54267 states and 69450 transitions. Word has length 272 [2020-10-26 20:49:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:54,043 INFO L481 AbstractCegarLoop]: Abstraction has 54267 states and 69450 transitions. [2020-10-26 20:49:54,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 20:49:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 54267 states and 69450 transitions. [2020-10-26 20:49:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 20:49:54,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:54,119 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, 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] [2020-10-26 20:49:54,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:49:54,119 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:54,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:54,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2078165194, now seen corresponding path program 2 times [2020-10-26 20:49:54,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:54,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245367758] [2020-10-26 20:49:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:54,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:54,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:56,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-26 20:49:58,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:58,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4399 [2020-10-26 20:49:58,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:49:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 20:49:58,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:58,904 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:58,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:58,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:58,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:58,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:49:58,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:58,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:58,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:58,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:59,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:59,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:59,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:59,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:59,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:59,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:49:59,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:59,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:49:59,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:59,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:59,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:59,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:59,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:49:59,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:59,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 20:49:59,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:59,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:49:59,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:59,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:49:59,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:59,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 20:49:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:59,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:59,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:59,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 20:49:59,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:59,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-26 20:49:59,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:49:59,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 106 proven. 54 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 20:49:59,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245367758] [2020-10-26 20:49:59,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:59,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:49:59,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361830269] [2020-10-26 20:49:59,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:49:59,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:59,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:49:59,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:49:59,638 INFO L87 Difference]: Start difference. First operand 54267 states and 69450 transitions. Second operand 10 states. [2020-10-26 20:49:59,929 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:50:00,357 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:01,513 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:50:02,193 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:50:06,002 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:06,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:06,986 INFO L93 Difference]: Finished difference Result 134307 states and 176779 transitions. [2020-10-26 20:50:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 20:50:06,987 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 272 [2020-10-26 20:50:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:07,333 INFO L225 Difference]: With dead ends: 134307 [2020-10-26 20:50:07,333 INFO L226 Difference]: Without dead ends: 80577 [2020-10-26 20:50:07,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2020-10-26 20:50:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80577 states. [2020-10-26 20:50:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80577 to 79943. [2020-10-26 20:50:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79943 states. [2020-10-26 20:50:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79943 states to 79943 states and 98830 transitions. [2020-10-26 20:50:10,273 INFO L78 Accepts]: Start accepts. Automaton has 79943 states and 98830 transitions. Word has length 272 [2020-10-26 20:50:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:10,274 INFO L481 AbstractCegarLoop]: Abstraction has 79943 states and 98830 transitions. [2020-10-26 20:50:10,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:50:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 79943 states and 98830 transitions. [2020-10-26 20:50:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-26 20:50:10,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:10,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 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] [2020-10-26 20:50:10,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:50:10,357 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:10,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:10,358 INFO L82 PathProgramCache]: Analyzing trace with hash 876500719, now seen corresponding path program 1 times [2020-10-26 20:50:10,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:10,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514604205] [2020-10-26 20:50:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:10,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:11,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:11,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:14,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:14,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 20:50:14,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:14,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3739 [2020-10-26 20:50:14,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:50:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:50:14,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:14,457 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:14,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:14,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:14,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:14,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:14,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:14,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:50:14,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:14,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:14,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:14,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:14,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:14,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:14,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:14,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:14,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:50:14,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:14,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 20:50:14,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:14,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:14,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:14,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:50:14,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:14,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:50:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:14,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:14,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:14,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:50:14,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:14,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 20:50:14,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-26 20:50:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:14,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 108 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:50:14,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514604205] [2020-10-26 20:50:14,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:14,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:50:14,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499195691] [2020-10-26 20:50:14,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:50:14,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:14,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:50:14,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:50:14,963 INFO L87 Difference]: Start difference. First operand 79943 states and 98830 transitions. Second operand 7 states. [2020-10-26 20:50:15,247 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:17,114 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:50:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:19,895 INFO L93 Difference]: Finished difference Result 207890 states and 259775 transitions. [2020-10-26 20:50:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:50:19,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 273 [2020-10-26 20:50:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:20,903 INFO L225 Difference]: With dead ends: 207890 [2020-10-26 20:50:20,904 INFO L226 Difference]: Without dead ends: 128936 [2020-10-26 20:50:21,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:50:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128936 states. [2020-10-26 20:50:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128936 to 128849. [2020-10-26 20:50:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128849 states. [2020-10-26 20:50:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128849 states to 128849 states and 159658 transitions. [2020-10-26 20:50:24,934 INFO L78 Accepts]: Start accepts. Automaton has 128849 states and 159658 transitions. Word has length 273 [2020-10-26 20:50:24,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:24,934 INFO L481 AbstractCegarLoop]: Abstraction has 128849 states and 159658 transitions. [2020-10-26 20:50:24,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:24,934 INFO L276 IsEmpty]: Start isEmpty. Operand 128849 states and 159658 transitions. [2020-10-26 20:50:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-26 20:50:24,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:24,996 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, 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, 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] [2020-10-26 20:50:24,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:50:24,996 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:24,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1431150498, now seen corresponding path program 1 times [2020-10-26 20:50:24,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:24,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216881558] [2020-10-26 20:50:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:25,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:25,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:26,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:29,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:29,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 300 [2020-10-26 20:50:29,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:29,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4940 [2020-10-26 20:50:29,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:29,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:50:29,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:29,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-26 20:50:29,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:30,288 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:30,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:30,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:30,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:30,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:30,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:30,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:50:30,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:30,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:30,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:30,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:30,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:30,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:30,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:30,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:30,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:30,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:30,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:50:30,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:30,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:30,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:30,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:30,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 38 [2020-10-26 20:50:30,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:30,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:30,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:30,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:50:30,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:30,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 20:50:30,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:30,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:30,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:30,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:50:30,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:30,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:50:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:30,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 118 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 20:50:30,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216881558] [2020-10-26 20:50:30,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:30,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:50:30,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251717439] [2020-10-26 20:50:30,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:50:30,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:30,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:50:30,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:50:30,990 INFO L87 Difference]: Start difference. First operand 128849 states and 159658 transitions. Second operand 7 states. [2020-10-26 20:50:31,250 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:36,118 INFO L93 Difference]: Finished difference Result 269223 states and 335272 transitions. [2020-10-26 20:50:36,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:50:36,119 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 284 [2020-10-26 20:50:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:37,023 INFO L225 Difference]: With dead ends: 269223 [2020-10-26 20:50:37,023 INFO L226 Difference]: Without dead ends: 143011 [2020-10-26 20:50:37,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:50:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143011 states. [2020-10-26 20:50:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143011 to 142431. [2020-10-26 20:50:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142431 states. [2020-10-26 20:50:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142431 states to 142431 states and 176926 transitions. [2020-10-26 20:50:41,138 INFO L78 Accepts]: Start accepts. Automaton has 142431 states and 176926 transitions. Word has length 284 [2020-10-26 20:50:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:41,138 INFO L481 AbstractCegarLoop]: Abstraction has 142431 states and 176926 transitions. [2020-10-26 20:50:41,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 142431 states and 176926 transitions. [2020-10-26 20:50:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-26 20:50:41,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:41,221 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:41,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:50:41,221 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:41,221 INFO L82 PathProgramCache]: Analyzing trace with hash 761886936, now seen corresponding path program 1 times [2020-10-26 20:50:41,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:41,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632605695] [2020-10-26 20:50:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:41,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:41,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:41,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:42,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:46,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:46,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-26 20:50:46,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:50:46,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 20:50:46,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:46,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 20:50:46,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:46,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 20:50:46,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:46,623 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:46,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:46,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:46,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:46,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:46,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:46,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:50:46,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:46,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:46,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:46,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:46,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:46,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:46,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:46,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:46,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:46,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:46,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:50:46,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:46,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:46,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:46,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:46,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:46,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:46,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:46,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:46,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:50:46,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:46,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:50:46,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:46,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:46,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:46,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:50:46,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:46,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:50:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:46,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:46,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:50:46,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:46,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:50:46,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:46,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:50:46,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:46,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:50:46,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:46,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:50:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:47,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:47,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:47,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:50:47,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:47,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 20:50:47,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:50:47,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:47,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 20:50:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:47,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:47,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:47,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:50:47,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:47,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:50:47,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:47,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:47,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-26 20:50:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:47,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 186 proven. 64 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-26 20:50:47,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632605695] [2020-10-26 20:50:47,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:47,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 20:50:47,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539873610] [2020-10-26 20:50:47,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 20:50:47,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:47,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 20:50:47,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:50:47,331 INFO L87 Difference]: Start difference. First operand 142431 states and 176926 transitions. Second operand 11 states. [2020-10-26 20:50:47,655 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:48,042 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:50,298 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 161 [2020-10-26 20:50:53,917 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:50:55,449 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:58,207 INFO L93 Difference]: Finished difference Result 371230 states and 488258 transitions. [2020-10-26 20:50:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 20:50:58,208 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 295 [2020-10-26 20:50:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:59,678 INFO L225 Difference]: With dead ends: 371230 [2020-10-26 20:50:59,679 INFO L226 Difference]: Without dead ends: 231220 [2020-10-26 20:50:59,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-10-26 20:51:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231220 states. [2020-10-26 20:51:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231220 to 226936. [2020-10-26 20:51:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226936 states. [2020-10-26 20:51:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226936 states to 226936 states and 281373 transitions. [2020-10-26 20:51:06,368 INFO L78 Accepts]: Start accepts. Automaton has 226936 states and 281373 transitions. Word has length 295 [2020-10-26 20:51:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:06,369 INFO L481 AbstractCegarLoop]: Abstraction has 226936 states and 281373 transitions. [2020-10-26 20:51:06,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 20:51:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 226936 states and 281373 transitions. [2020-10-26 20:51:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-26 20:51:06,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:06,424 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:51:06,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:51:06,425 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:06,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1591090707, now seen corresponding path program 1 times [2020-10-26 20:51:06,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:06,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149380694] [2020-10-26 20:51:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:06,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:06,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:07,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:10,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:11,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:11,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-26 20:51:11,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:51:11,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 20:51:11,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:11,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:51:11,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:11,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-26 20:51:11,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:11,781 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:11,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:11,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:11,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:11,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:11,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:11,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:51:11,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:11,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:11,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:11,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:11,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:11,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:11,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:11,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:11,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:51:11,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:11,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:51:11,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:11,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:11,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:11,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:51:11,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:12,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:51:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:12,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:12,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:12,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 20:51:12,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:12,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-26 20:51:12,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:12,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:12,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:12,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 20:51:12,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:12,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 20:51:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:12,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:12,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:12,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:51:12,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:12,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 20:51:12,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:51:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 133 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-26 20:51:12,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149380694] [2020-10-26 20:51:12,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:12,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:51:12,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708191422] [2020-10-26 20:51:12,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:51:12,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:12,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:51:12,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:51:12,748 INFO L87 Difference]: Start difference. First operand 226936 states and 281373 transitions. Second operand 9 states. [2020-10-26 20:51:13,003 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:51:14,158 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163