/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:02:34,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:02:34,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:02:34,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:02:34,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:02:34,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:02:34,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:02:34,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:02:34,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:02:34,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:02:34,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:02:34,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:02:34,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:02:34,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:02:34,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:02:34,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:02:34,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:02:34,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:02:34,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:02:34,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:02:34,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:02:34,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:02:34,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:02:34,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:02:34,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:02:34,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:02:34,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:02:34,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:02:34,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 23:02:34,342 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:02:34,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:02:34,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:02:34,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:02:34,348 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:02:34,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:02:34,349 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:02:34,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:02:34,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:02:34,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:02:34,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:02:34,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:02:34,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:02:34,352 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:02:34,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:02:34,352 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:02:34,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:02:34,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:02:34,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:02:34,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:02:34,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:02:34,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:02:34,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:02:34,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:02:34,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:02:34,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:02:34,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:02:34,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:02:34,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:02:34,356 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:02:34,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:02:34,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:02:34,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:02:34,870 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:02:34,870 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:02:34,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:02:34,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1ee32788/3d40d174cf0746519d39f9a693c26d8c/FLAGf65a39248 [2020-11-06 23:02:35,735 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:02:35,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:02:35,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1ee32788/3d40d174cf0746519d39f9a693c26d8c/FLAGf65a39248 [2020-11-06 23:02:35,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1ee32788/3d40d174cf0746519d39f9a693c26d8c [2020-11-06 23:02:35,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:02:35,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:02:35,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:02:35,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:02:35,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:02:35,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:35" (1/1) ... [2020-11-06 23:02:35,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cb97264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:35, skipping insertion in model container [2020-11-06 23:02:35,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:35" (1/1) ... [2020-11-06 23:02:35,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:02:36,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:02:37,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:02:37,099 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:02:37,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:02:37,566 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:02:37,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:37 WrapperNode [2020-11-06 23:02:37,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:02:37,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:02:37,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:02:37,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:02:37,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:37" (1/1) ... [2020-11-06 23:02:37,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:37" (1/1) ... [2020-11-06 23:02:37,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:37" (1/1) ... [2020-11-06 23:02:37,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:37" (1/1) ... [2020-11-06 23:02:37,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:37" (1/1) ... [2020-11-06 23:02:37,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:37" (1/1) ... [2020-11-06 23:02:37,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:37" (1/1) ... [2020-11-06 23:02:37,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:02:37,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:02:37,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:02:37,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:02:37,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-11-06 23:02:37,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:02:37,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:02:37,876 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:02:37,876 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:02:37,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:02:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:02:37,877 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:02:37,877 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:02:37,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:02:37,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:02:37,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-06 23:02:37,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:02:37,878 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:02:37,878 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:02:37,878 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:02:37,878 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:02:37,878 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:02:37,878 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:02:37,879 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:02:37,879 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:02:37,879 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:02:37,879 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:02:37,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:02:37,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:02:37,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:02:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:02:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:02:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:02:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:02:40,843 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:02:40,844 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:02:40,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:40 BoogieIcfgContainer [2020-11-06 23:02:40,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:02:40,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:02:40,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:02:40,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:02:40,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:02:35" (1/3) ... [2020-11-06 23:02:40,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40689e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:40, skipping insertion in model container [2020-11-06 23:02:40,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:37" (2/3) ... [2020-11-06 23:02:40,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40689e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:40, skipping insertion in model container [2020-11-06 23:02:40,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:40" (3/3) ... [2020-11-06 23:02:40,863 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:02:40,881 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:02:40,890 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:02:40,904 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:02:40,947 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:02:40,947 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:02:40,947 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:02:40,948 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:02:40,948 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:02:40,948 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:02:40,948 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:02:40,948 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:02:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states. [2020-11-06 23:02:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-06 23:02:41,016 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:41,018 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:41,018 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:41,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:41,025 INFO L82 PathProgramCache]: Analyzing trace with hash 253401268, now seen corresponding path program 1 times [2020-11-06 23:02:41,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:41,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477606236] [2020-11-06 23:02:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:42,742 WARN L194 SmtUtils]: Spent 574.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:02:42,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:43,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477606236] [2020-11-06 23:02:43,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:43,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:43,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797510051] [2020-11-06 23:02:43,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:43,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:43,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:43,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:43,069 INFO L87 Difference]: Start difference. First operand 793 states. Second operand 4 states. [2020-11-06 23:02:43,822 WARN L194 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-11-06 23:02:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:49,380 INFO L93 Difference]: Finished difference Result 1495 states and 2629 transitions. [2020-11-06 23:02:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:49,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-11-06 23:02:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:49,417 INFO L225 Difference]: With dead ends: 1495 [2020-11-06 23:02:49,417 INFO L226 Difference]: Without dead ends: 1275 [2020-11-06 23:02:49,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2020-11-06 23:02:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1272. [2020-11-06 23:02:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-11-06 23:02:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1979 transitions. [2020-11-06 23:02:49,621 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1979 transitions. Word has length 327 [2020-11-06 23:02:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:49,626 INFO L481 AbstractCegarLoop]: Abstraction has 1272 states and 1979 transitions. [2020-11-06 23:02:49,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1979 transitions. [2020-11-06 23:02:49,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-06 23:02:49,646 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:49,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:49,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:02:49,647 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:49,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1052447530, now seen corresponding path program 1 times [2020-11-06 23:02:49,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:49,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293327436] [2020-11-06 23:02:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:50,646 WARN L194 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:02:50,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:50,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293327436] [2020-11-06 23:02:50,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:50,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:50,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360747323] [2020-11-06 23:02:50,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:50,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:50,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:50,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:50,957 INFO L87 Difference]: Start difference. First operand 1272 states and 1979 transitions. Second operand 4 states. [2020-11-06 23:02:51,478 WARN L194 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-11-06 23:02:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:55,773 INFO L93 Difference]: Finished difference Result 2522 states and 3952 transitions. [2020-11-06 23:02:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:55,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-11-06 23:02:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:55,791 INFO L225 Difference]: With dead ends: 2522 [2020-11-06 23:02:55,791 INFO L226 Difference]: Without dead ends: 2187 [2020-11-06 23:02:55,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-11-06 23:02:55,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2184. [2020-11-06 23:02:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-11-06 23:02:55,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3389 transitions. [2020-11-06 23:02:55,911 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3389 transitions. Word has length 327 [2020-11-06 23:02:55,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:55,913 INFO L481 AbstractCegarLoop]: Abstraction has 2184 states and 3389 transitions. [2020-11-06 23:02:55,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:55,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3389 transitions. [2020-11-06 23:02:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-06 23:02:55,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:55,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:55,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:02:55,928 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:55,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2112533621, now seen corresponding path program 1 times [2020-11-06 23:02:55,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:55,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002309795] [2020-11-06 23:02:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:57,187 WARN L194 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:02:57,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:57,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002309795] [2020-11-06 23:02:57,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:57,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:02:57,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612447588] [2020-11-06 23:02:57,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:02:57,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:57,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:02:57,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:57,409 INFO L87 Difference]: Start difference. First operand 2184 states and 3389 transitions. Second operand 5 states. [2020-11-06 23:03:03,493 WARN L194 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:05,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:05,341 INFO L93 Difference]: Finished difference Result 6465 states and 10024 transitions. [2020-11-06 23:03:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:03:05,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-11-06 23:03:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:05,364 INFO L225 Difference]: With dead ends: 6465 [2020-11-06 23:03:05,365 INFO L226 Difference]: Without dead ends: 4296 [2020-11-06 23:03:05,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2020-11-06 23:03:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4293. [2020-11-06 23:03:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4293 states. [2020-11-06 23:03:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 6627 transitions. [2020-11-06 23:03:05,566 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 6627 transitions. Word has length 327 [2020-11-06 23:03:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:05,567 INFO L481 AbstractCegarLoop]: Abstraction has 4293 states and 6627 transitions. [2020-11-06 23:03:05,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 6627 transitions. [2020-11-06 23:03:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-06 23:03:05,581 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:05,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:05,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:03:05,582 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:05,582 INFO L82 PathProgramCache]: Analyzing trace with hash 347310113, now seen corresponding path program 1 times [2020-11-06 23:03:05,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:05,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058271687] [2020-11-06 23:03:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:06,240 WARN L194 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:06,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:06,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058271687] [2020-11-06 23:03:06,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:06,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:06,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922063621] [2020-11-06 23:03:06,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:06,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:06,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:06,361 INFO L87 Difference]: Start difference. First operand 4293 states and 6627 transitions. Second operand 4 states. [2020-11-06 23:03:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:14,941 INFO L93 Difference]: Finished difference Result 12832 states and 19809 transitions. [2020-11-06 23:03:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:03:14,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-11-06 23:03:14,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:14,996 INFO L225 Difference]: With dead ends: 12832 [2020-11-06 23:03:14,996 INFO L226 Difference]: Without dead ends: 8564 [2020-11-06 23:03:15,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8564 states. [2020-11-06 23:03:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8564 to 4306. [2020-11-06 23:03:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4306 states. [2020-11-06 23:03:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 6646 transitions. [2020-11-06 23:03:15,253 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 6646 transitions. Word has length 329 [2020-11-06 23:03:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:15,254 INFO L481 AbstractCegarLoop]: Abstraction has 4306 states and 6646 transitions. [2020-11-06 23:03:15,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 6646 transitions. [2020-11-06 23:03:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-06 23:03:15,264 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:15,265 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:15,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:03:15,265 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:15,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1758118458, now seen corresponding path program 1 times [2020-11-06 23:03:15,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:15,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242754177] [2020-11-06 23:03:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:15,949 WARN L194 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:15,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:16,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242754177] [2020-11-06 23:03:16,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:16,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:16,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574692837] [2020-11-06 23:03:16,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:16,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:16,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:16,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:16,180 INFO L87 Difference]: Start difference. First operand 4306 states and 6646 transitions. Second operand 4 states. [2020-11-06 23:03:23,189 WARN L194 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-11-06 23:03:25,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:25,015 INFO L93 Difference]: Finished difference Result 12597 states and 19397 transitions. [2020-11-06 23:03:25,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:25,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-11-06 23:03:25,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:25,055 INFO L225 Difference]: With dead ends: 12597 [2020-11-06 23:03:25,056 INFO L226 Difference]: Without dead ends: 8433 [2020-11-06 23:03:25,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8433 states. [2020-11-06 23:03:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8433 to 8430. [2020-11-06 23:03:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8430 states. [2020-11-06 23:03:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8430 states to 8430 states and 12936 transitions. [2020-11-06 23:03:25,434 INFO L78 Accepts]: Start accepts. Automaton has 8430 states and 12936 transitions. Word has length 329 [2020-11-06 23:03:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:25,434 INFO L481 AbstractCegarLoop]: Abstraction has 8430 states and 12936 transitions. [2020-11-06 23:03:25,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 8430 states and 12936 transitions. [2020-11-06 23:03:25,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-11-06 23:03:25,450 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:25,487 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:25,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:03:25,490 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:25,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:25,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1275662638, now seen corresponding path program 1 times [2020-11-06 23:03:25,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:25,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409034797] [2020-11-06 23:03:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:26,093 WARN L194 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:26,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:26,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409034797] [2020-11-06 23:03:26,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:26,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:26,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352346103] [2020-11-06 23:03:26,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:26,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:26,221 INFO L87 Difference]: Start difference. First operand 8430 states and 12936 transitions. Second operand 4 states. [2020-11-06 23:03:35,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:35,053 INFO L93 Difference]: Finished difference Result 25175 states and 38620 transitions. [2020-11-06 23:03:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:03:35,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-11-06 23:03:35,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:35,091 INFO L225 Difference]: With dead ends: 25175 [2020-11-06 23:03:35,091 INFO L226 Difference]: Without dead ends: 16805 [2020-11-06 23:03:35,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16805 states. [2020-11-06 23:03:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16805 to 8448. [2020-11-06 23:03:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8448 states. [2020-11-06 23:03:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8448 states to 8448 states and 12957 transitions. [2020-11-06 23:03:35,639 INFO L78 Accepts]: Start accepts. Automaton has 8448 states and 12957 transitions. Word has length 330 [2020-11-06 23:03:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:35,640 INFO L481 AbstractCegarLoop]: Abstraction has 8448 states and 12957 transitions. [2020-11-06 23:03:35,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 8448 states and 12957 transitions. [2020-11-06 23:03:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:03:35,656 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:35,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:35,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:03:35,656 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:35,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:35,657 INFO L82 PathProgramCache]: Analyzing trace with hash -688908789, now seen corresponding path program 1 times [2020-11-06 23:03:35,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:35,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937635097] [2020-11-06 23:03:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:36,381 WARN L194 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:36,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:36,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937635097] [2020-11-06 23:03:36,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:36,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:36,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447445769] [2020-11-06 23:03:36,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:36,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:36,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:36,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:36,659 INFO L87 Difference]: Start difference. First operand 8448 states and 12957 transitions. Second operand 4 states. [2020-11-06 23:03:44,078 WARN L194 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-11-06 23:03:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:46,083 INFO L93 Difference]: Finished difference Result 24665 states and 37728 transitions. [2020-11-06 23:03:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:46,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-11-06 23:03:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:46,127 INFO L225 Difference]: With dead ends: 24665 [2020-11-06 23:03:46,128 INFO L226 Difference]: Without dead ends: 16462 [2020-11-06 23:03:46,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16462 states. [2020-11-06 23:03:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16462 to 16459. [2020-11-06 23:03:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16459 states. [2020-11-06 23:03:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16459 states to 16459 states and 25069 transitions. [2020-11-06 23:03:47,078 INFO L78 Accepts]: Start accepts. Automaton has 16459 states and 25069 transitions. Word has length 331 [2020-11-06 23:03:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:47,078 INFO L481 AbstractCegarLoop]: Abstraction has 16459 states and 25069 transitions. [2020-11-06 23:03:47,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 16459 states and 25069 transitions. [2020-11-06 23:03:47,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:03:47,103 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:47,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:47,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:03:47,103 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:47,104 INFO L82 PathProgramCache]: Analyzing trace with hash -592962034, now seen corresponding path program 1 times [2020-11-06 23:03:47,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:47,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504690666] [2020-11-06 23:03:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:48,016 WARN L194 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:48,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:48,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504690666] [2020-11-06 23:03:48,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:48,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:48,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320107992] [2020-11-06 23:03:48,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:48,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:48,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:48,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:48,198 INFO L87 Difference]: Start difference. First operand 16459 states and 25069 transitions. Second operand 5 states. [2020-11-06 23:03:54,849 WARN L194 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:57,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:57,086 INFO L93 Difference]: Finished difference Result 48575 states and 73864 transitions. [2020-11-06 23:03:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:03:57,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-11-06 23:03:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:57,154 INFO L225 Difference]: With dead ends: 48575 [2020-11-06 23:03:57,155 INFO L226 Difference]: Without dead ends: 32175 [2020-11-06 23:03:57,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32175 states. [2020-11-06 23:03:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32175 to 32172. [2020-11-06 23:03:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32172 states. [2020-11-06 23:03:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32172 states to 32172 states and 48662 transitions. [2020-11-06 23:03:58,545 INFO L78 Accepts]: Start accepts. Automaton has 32172 states and 48662 transitions. Word has length 331 [2020-11-06 23:03:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:58,545 INFO L481 AbstractCegarLoop]: Abstraction has 32172 states and 48662 transitions. [2020-11-06 23:03:58,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 32172 states and 48662 transitions. [2020-11-06 23:03:58,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-11-06 23:03:58,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:58,590 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:58,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:03:58,591 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:58,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2071890782, now seen corresponding path program 1 times [2020-11-06 23:03:58,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:58,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848452144] [2020-11-06 23:03:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:59,439 WARN L194 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:59,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:59,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848452144] [2020-11-06 23:03:59,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:59,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:59,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884771024] [2020-11-06 23:03:59,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:59,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:59,786 INFO L87 Difference]: Start difference. First operand 32172 states and 48662 transitions. Second operand 5 states. [2020-11-06 23:04:07,420 WARN L194 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:04:10,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:10,192 INFO L93 Difference]: Finished difference Result 94842 states and 143206 transitions. [2020-11-06 23:04:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:10,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-11-06 23:04:10,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:10,296 INFO L225 Difference]: With dead ends: 94842 [2020-11-06 23:04:10,296 INFO L226 Difference]: Without dead ends: 62871 [2020-11-06 23:04:10,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:04:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62871 states. [2020-11-06 23:04:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62871 to 62868. [2020-11-06 23:04:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62868 states. [2020-11-06 23:04:13,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62868 states to 62868 states and 94373 transitions. [2020-11-06 23:04:13,563 INFO L78 Accepts]: Start accepts. Automaton has 62868 states and 94373 transitions. Word has length 333 [2020-11-06 23:04:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:13,563 INFO L481 AbstractCegarLoop]: Abstraction has 62868 states and 94373 transitions. [2020-11-06 23:04:13,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:04:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 62868 states and 94373 transitions. [2020-11-06 23:04:13,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-11-06 23:04:13,612 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:13,612 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:13,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:04:13,613 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash 618089564, now seen corresponding path program 1 times [2020-11-06 23:04:13,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:13,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873931600] [2020-11-06 23:04:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:14,352 WARN L194 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:04:14,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:14,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873931600] [2020-11-06 23:04:14,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:14,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:14,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851776921] [2020-11-06 23:04:14,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:14,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:14,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:14,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:14,673 INFO L87 Difference]: Start difference. First operand 62868 states and 94373 transitions. Second operand 4 states. [2020-11-06 23:04:25,440 WARN L194 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-11-06 23:04:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:28,888 INFO L93 Difference]: Finished difference Result 184972 states and 277031 transitions. [2020-11-06 23:04:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:28,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-11-06 23:04:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:29,215 INFO L225 Difference]: With dead ends: 184972 [2020-11-06 23:04:29,216 INFO L226 Difference]: Without dead ends: 123001 [2020-11-06 23:04:29,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123001 states. [2020-11-06 23:04:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123001 to 122998. [2020-11-06 23:04:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122998 states. [2020-11-06 23:04:35,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122998 states to 122998 states and 183255 transitions. [2020-11-06 23:04:35,173 INFO L78 Accepts]: Start accepts. Automaton has 122998 states and 183255 transitions. Word has length 335 [2020-11-06 23:04:35,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:35,174 INFO L481 AbstractCegarLoop]: Abstraction has 122998 states and 183255 transitions. [2020-11-06 23:04:35,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 122998 states and 183255 transitions. [2020-11-06 23:04:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-11-06 23:04:35,313 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:35,313 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:35,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:04:35,314 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:35,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:35,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2012793097, now seen corresponding path program 1 times [2020-11-06 23:04:35,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:35,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114498477] [2020-11-06 23:04:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:36,201 WARN L194 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:04:36,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:36,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114498477] [2020-11-06 23:04:36,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:36,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:36,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038421651] [2020-11-06 23:04:36,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:36,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:36,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:36,395 INFO L87 Difference]: Start difference. First operand 122998 states and 183255 transitions. Second operand 4 states. [2020-11-06 23:04:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:55,803 INFO L93 Difference]: Finished difference Result 368188 states and 548450 transitions. [2020-11-06 23:04:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:04:55,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-11-06 23:04:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:56,334 INFO L225 Difference]: With dead ends: 368188 [2020-11-06 23:04:56,334 INFO L226 Difference]: Without dead ends: 245637 [2020-11-06 23:04:56,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245637 states. [2020-11-06 23:05:03,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245637 to 123188. [2020-11-06 23:05:03,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123188 states. [2020-11-06 23:05:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123188 states to 123188 states and 183535 transitions. [2020-11-06 23:05:03,882 INFO L78 Accepts]: Start accepts. Automaton has 123188 states and 183535 transitions. Word has length 335 [2020-11-06 23:05:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:03,882 INFO L481 AbstractCegarLoop]: Abstraction has 123188 states and 183535 transitions. [2020-11-06 23:05:03,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 123188 states and 183535 transitions. [2020-11-06 23:05:03,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-11-06 23:05:03,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:03,972 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:03,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:05:03,973 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:03,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:03,973 INFO L82 PathProgramCache]: Analyzing trace with hash 369574786, now seen corresponding path program 1 times [2020-11-06 23:05:03,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:03,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191832401] [2020-11-06 23:05:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:04,864 WARN L194 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:05:04,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:05,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191832401] [2020-11-06 23:05:05,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:05,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:05,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667183542] [2020-11-06 23:05:05,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:05,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:05,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:05,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:05,050 INFO L87 Difference]: Start difference. First operand 123188 states and 183535 transitions. Second operand 4 states. [2020-11-06 23:05:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:25,709 INFO L93 Difference]: Finished difference Result 368300 states and 548528 transitions. [2020-11-06 23:05:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:05:25,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-11-06 23:05:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:26,248 INFO L225 Difference]: With dead ends: 368300 [2020-11-06 23:05:26,248 INFO L226 Difference]: Without dead ends: 245799 [2020-11-06 23:05:26,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245799 states. [2020-11-06 23:05:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245799 to 123350. [2020-11-06 23:05:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123350 states. [2020-11-06 23:05:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123350 states to 123350 states and 183721 transitions. [2020-11-06 23:05:34,333 INFO L78 Accepts]: Start accepts. Automaton has 123350 states and 183721 transitions. Word has length 336 [2020-11-06 23:05:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:34,334 INFO L481 AbstractCegarLoop]: Abstraction has 123350 states and 183721 transitions. [2020-11-06 23:05:34,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 123350 states and 183721 transitions. [2020-11-06 23:05:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-11-06 23:05:34,442 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:34,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:34,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:05:34,443 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:34,443 INFO L82 PathProgramCache]: Analyzing trace with hash -959930463, now seen corresponding path program 1 times [2020-11-06 23:05:34,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:34,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734932566] [2020-11-06 23:05:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:35,195 WARN L194 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:05:35,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:35,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734932566] [2020-11-06 23:05:35,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:35,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:35,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066941555] [2020-11-06 23:05:35,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:35,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:35,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:35,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:35,592 INFO L87 Difference]: Start difference. First operand 123350 states and 183721 transitions. Second operand 4 states. [2020-11-06 23:05:51,175 WARN L194 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-11-06 23:05:57,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:57,110 INFO L93 Difference]: Finished difference Result 350474 states and 520833 transitions. [2020-11-06 23:05:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:05:57,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-11-06 23:05:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:57,755 INFO L225 Difference]: With dead ends: 350474 [2020-11-06 23:05:57,755 INFO L226 Difference]: Without dead ends: 228671 [2020-11-06 23:05:57,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:57,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228671 states. [2020-11-06 23:06:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228671 to 228668. [2020-11-06 23:06:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228668 states. [2020-11-06 23:06:11,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228668 states to 228668 states and 337747 transitions. [2020-11-06 23:06:11,902 INFO L78 Accepts]: Start accepts. Automaton has 228668 states and 337747 transitions. Word has length 337 [2020-11-06 23:06:11,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:11,903 INFO L481 AbstractCegarLoop]: Abstraction has 228668 states and 337747 transitions. [2020-11-06 23:06:11,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:06:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 228668 states and 337747 transitions. [2020-11-06 23:06:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-11-06 23:06:12,109 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:12,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:06:12,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-06 23:06:12,110 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:12,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:12,110 INFO L82 PathProgramCache]: Analyzing trace with hash -652499484, now seen corresponding path program 1 times [2020-11-06 23:06:12,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:12,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591305509] [2020-11-06 23:06:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:13,348 WARN L194 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:06:13,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:13,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591305509] [2020-11-06 23:06:13,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:13,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:06:13,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956104306] [2020-11-06 23:06:13,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:06:13,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:13,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:06:13,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:06:13,499 INFO L87 Difference]: Start difference. First operand 228668 states and 337747 transitions. Second operand 5 states. [2020-11-06 23:06:35,508 WARN L194 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 313