./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8080e0a725fc4bb7ff7c553cf5cace8f3ab82ec5bf4c36129edf77f076dbcbd3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:22:11,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:22:11,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:22:12,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:22:12,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:22:12,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:22:12,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:22:12,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:22:12,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:22:12,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:22:12,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:22:12,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:22:12,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:22:12,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:22:12,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:22:12,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:22:12,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:22:12,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:22:12,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:22:12,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:22:12,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:22:12,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:22:12,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:22:12,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:22:12,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:22:12,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:22:12,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:22:12,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:22:12,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:22:12,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:22:12,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:22:12,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:22:12,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:22:12,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:22:12,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:22:12,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:22:12,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:22:12,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:22:12,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:22:12,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:22:12,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:22:12,102 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:22:12,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:22:12,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:22:12,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:22:12,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:22:12,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:22:12,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:22:12,149 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:22:12,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:22:12,149 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:22:12,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:22:12,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:22:12,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:22:12,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:22:12,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:22:12,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:22:12,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:22:12,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:22:12,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:22:12,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:22:12,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:22:12,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:22:12,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:22:12,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:22:12,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:22:12,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:22:12,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:22:12,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:22:12,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:22:12,154 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:22:12,154 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:22:12,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:22:12,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:22:12,155 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8080e0a725fc4bb7ff7c553cf5cace8f3ab82ec5bf4c36129edf77f076dbcbd3 [2021-11-02 22:22:12,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:22:12,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:22:12,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:22:12,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:22:12,491 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:22:12,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-02 22:22:12,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/data/f05637494/d48d19f9fe97455b92fdf4db775b1293/FLAGde144ef75 [2021-11-02 22:22:13,244 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:22:13,245 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-02 22:22:13,256 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/data/f05637494/d48d19f9fe97455b92fdf4db775b1293/FLAGde144ef75 [2021-11-02 22:22:13,599 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/data/f05637494/d48d19f9fe97455b92fdf4db775b1293 [2021-11-02 22:22:13,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:22:13,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:22:13,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:22:13,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:22:13,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:22:13,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:22:13" (1/1) ... [2021-11-02 22:22:13,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c78729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:13, skipping insertion in model container [2021-11-02 22:22:13,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:22:13" (1/1) ... [2021-11-02 22:22:13,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:22:13,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:22:13,916 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4940,4953] [2021-11-02 22:22:13,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:22:13,953 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:22:14,007 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4940,4953] [2021-11-02 22:22:14,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:22:14,041 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:22:14,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14 WrapperNode [2021-11-02 22:22:14,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:22:14,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:22:14,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:22:14,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:22:14,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14" (1/1) ... [2021-11-02 22:22:14,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14" (1/1) ... [2021-11-02 22:22:14,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:22:14,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:22:14,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:22:14,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:22:14,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14" (1/1) ... [2021-11-02 22:22:14,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14" (1/1) ... [2021-11-02 22:22:14,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14" (1/1) ... [2021-11-02 22:22:14,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14" (1/1) ... [2021-11-02 22:22:14,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14" (1/1) ... [2021-11-02 22:22:14,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14" (1/1) ... [2021-11-02 22:22:14,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14" (1/1) ... [2021-11-02 22:22:14,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:22:14,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:22:14,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:22:14,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:22:14,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14" (1/1) ... [2021-11-02 22:22:14,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:22:14,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:14,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:22:14,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:22:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:22:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:22:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:22:14,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:22:14,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:22:14,922 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 22:22:14,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:22:14 BoogieIcfgContainer [2021-11-02 22:22:14,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:22:14,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:22:14,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:22:14,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:22:14,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:22:13" (1/3) ... [2021-11-02 22:22:14,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d1f4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:22:14, skipping insertion in model container [2021-11-02 22:22:14,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:22:14" (2/3) ... [2021-11-02 22:22:14,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d1f4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:22:14, skipping insertion in model container [2021-11-02 22:22:14,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:22:14" (3/3) ... [2021-11-02 22:22:14,947 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-02 22:22:14,952 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:22:14,953 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:22:15,010 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:22:15,017 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:22:15,018 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:22:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 80 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 22:22:15,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:15,053 INFO L513 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] [2021-11-02 22:22:15,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:15,061 INFO L85 PathProgramCache]: Analyzing trace with hash 377049112, now seen corresponding path program 1 times [2021-11-02 22:22:15,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:15,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709306801] [2021-11-02 22:22:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:15,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:15,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:15,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709306801] [2021-11-02 22:22:15,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709306801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:15,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:15,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:15,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670554048] [2021-11-02 22:22:15,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:15,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:15,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:15,529 INFO L87 Difference]: Start difference. First operand has 81 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 80 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:15,605 INFO L93 Difference]: Finished difference Result 183 states and 292 transitions. [2021-11-02 22:22:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:15,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-02 22:22:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:15,626 INFO L225 Difference]: With dead ends: 183 [2021-11-02 22:22:15,626 INFO L226 Difference]: Without dead ends: 122 [2021-11-02 22:22:15,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-02 22:22:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2021-11-02 22:22:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.4705882352941178) internal successors, (175), 119 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 175 transitions. [2021-11-02 22:22:15,697 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 175 transitions. Word has length 48 [2021-11-02 22:22:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:15,698 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 175 transitions. [2021-11-02 22:22:15,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 175 transitions. [2021-11-02 22:22:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:22:15,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:15,701 INFO L513 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] [2021-11-02 22:22:15,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:22:15,702 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:15,704 INFO L85 PathProgramCache]: Analyzing trace with hash 292717965, now seen corresponding path program 1 times [2021-11-02 22:22:15,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:15,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816731232] [2021-11-02 22:22:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:15,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:15,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:15,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816731232] [2021-11-02 22:22:15,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816731232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:15,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:15,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:15,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473561736] [2021-11-02 22:22:15,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:15,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:15,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:15,950 INFO L87 Difference]: Start difference. First operand 120 states and 175 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:16,063 INFO L93 Difference]: Finished difference Result 292 states and 447 transitions. [2021-11-02 22:22:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:16,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 22:22:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:16,068 INFO L225 Difference]: With dead ends: 292 [2021-11-02 22:22:16,069 INFO L226 Difference]: Without dead ends: 198 [2021-11-02 22:22:16,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-02 22:22:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2021-11-02 22:22:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.5128205128205128) internal successors, (295), 195 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 295 transitions. [2021-11-02 22:22:16,109 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 295 transitions. Word has length 49 [2021-11-02 22:22:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:16,110 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 295 transitions. [2021-11-02 22:22:16,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:16,110 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 295 transitions. [2021-11-02 22:22:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:22:16,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:16,113 INFO L513 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] [2021-11-02 22:22:16,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:22:16,113 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash -875864605, now seen corresponding path program 1 times [2021-11-02 22:22:16,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:16,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898165006] [2021-11-02 22:22:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:16,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:16,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:16,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898165006] [2021-11-02 22:22:16,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898165006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:16,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:16,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:16,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041632770] [2021-11-02 22:22:16,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:16,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:16,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:16,264 INFO L87 Difference]: Start difference. First operand 196 states and 295 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:16,324 INFO L93 Difference]: Finished difference Result 504 states and 781 transitions. [2021-11-02 22:22:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:16,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-02 22:22:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:16,330 INFO L225 Difference]: With dead ends: 504 [2021-11-02 22:22:16,330 INFO L226 Difference]: Without dead ends: 334 [2021-11-02 22:22:16,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-02 22:22:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2021-11-02 22:22:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.5317220543806647) internal successors, (507), 331 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 507 transitions. [2021-11-02 22:22:16,415 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 507 transitions. Word has length 50 [2021-11-02 22:22:16,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:16,415 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 507 transitions. [2021-11-02 22:22:16,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 507 transitions. [2021-11-02 22:22:16,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:22:16,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:16,419 INFO L513 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] [2021-11-02 22:22:16,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:22:16,420 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:16,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1524907140, now seen corresponding path program 1 times [2021-11-02 22:22:16,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:16,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715865680] [2021-11-02 22:22:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:16,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:16,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:16,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715865680] [2021-11-02 22:22:16,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715865680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:16,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:16,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:22:16,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673063994] [2021-11-02 22:22:16,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:22:16,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:16,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:22:16,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:16,614 INFO L87 Difference]: Start difference. First operand 332 states and 507 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:16,829 INFO L93 Difference]: Finished difference Result 638 states and 988 transitions. [2021-11-02 22:22:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:22:16,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 22:22:16,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:16,833 INFO L225 Difference]: With dead ends: 638 [2021-11-02 22:22:16,834 INFO L226 Difference]: Without dead ends: 332 [2021-11-02 22:22:16,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:22:16,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-02 22:22:16,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2021-11-02 22:22:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.5196374622356494) internal successors, (503), 331 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 503 transitions. [2021-11-02 22:22:16,895 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 503 transitions. Word has length 51 [2021-11-02 22:22:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:16,896 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 503 transitions. [2021-11-02 22:22:16,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 503 transitions. [2021-11-02 22:22:16,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:22:16,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:16,902 INFO L513 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] [2021-11-02 22:22:16,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:22:16,902 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:16,905 INFO L85 PathProgramCache]: Analyzing trace with hash -317123393, now seen corresponding path program 1 times [2021-11-02 22:22:16,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:16,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387414158] [2021-11-02 22:22:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:16,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:17,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:17,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387414158] [2021-11-02 22:22:17,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387414158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:17,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:17,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:22:17,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700857184] [2021-11-02 22:22:17,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:17,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:17,136 INFO L87 Difference]: Start difference. First operand 332 states and 503 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:17,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:17,378 INFO L93 Difference]: Finished difference Result 940 states and 1449 transitions. [2021-11-02 22:22:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:22:17,379 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 22:22:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:17,388 INFO L225 Difference]: With dead ends: 940 [2021-11-02 22:22:17,388 INFO L226 Difference]: Without dead ends: 634 [2021-11-02 22:22:17,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:22:17,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-02 22:22:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 632. [2021-11-02 22:22:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 1.5324881141045958) internal successors, (967), 631 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 967 transitions. [2021-11-02 22:22:17,484 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 967 transitions. Word has length 51 [2021-11-02 22:22:17,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:17,484 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 967 transitions. [2021-11-02 22:22:17,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 967 transitions. [2021-11-02 22:22:17,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:22:17,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:17,494 INFO L513 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] [2021-11-02 22:22:17,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:22:17,495 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:17,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1764152988, now seen corresponding path program 1 times [2021-11-02 22:22:17,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:17,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655004949] [2021-11-02 22:22:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:17,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:17,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:17,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655004949] [2021-11-02 22:22:17,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655004949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:17,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:17,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:22:17,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982783163] [2021-11-02 22:22:17,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:17,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:17,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:17,664 INFO L87 Difference]: Start difference. First operand 632 states and 967 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:17,944 INFO L93 Difference]: Finished difference Result 1836 states and 2833 transitions. [2021-11-02 22:22:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:22:17,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 22:22:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:17,966 INFO L225 Difference]: With dead ends: 1836 [2021-11-02 22:22:17,966 INFO L226 Difference]: Without dead ends: 1230 [2021-11-02 22:22:17,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:22:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-02 22:22:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1228. [2021-11-02 22:22:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 1.534637326813366) internal successors, (1883), 1227 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1883 transitions. [2021-11-02 22:22:18,116 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1883 transitions. Word has length 51 [2021-11-02 22:22:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:18,117 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 1883 transitions. [2021-11-02 22:22:18,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1883 transitions. [2021-11-02 22:22:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:22:18,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:18,119 INFO L513 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] [2021-11-02 22:22:18,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:22:18,120 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash -490284983, now seen corresponding path program 1 times [2021-11-02 22:22:18,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:18,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251952605] [2021-11-02 22:22:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:18,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:18,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:18,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251952605] [2021-11-02 22:22:18,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251952605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:18,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:18,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:22:18,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062382699] [2021-11-02 22:22:18,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:18,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:18,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:18,292 INFO L87 Difference]: Start difference. First operand 1228 states and 1883 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:19,376 INFO L93 Difference]: Finished difference Result 9642 states and 14882 transitions. [2021-11-02 22:22:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:22:19,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 22:22:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:19,450 INFO L225 Difference]: With dead ends: 9642 [2021-11-02 22:22:19,451 INFO L226 Difference]: Without dead ends: 8440 [2021-11-02 22:22:19,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:22:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8440 states. [2021-11-02 22:22:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8440 to 2428. [2021-11-02 22:22:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2428 states, 2427 states have (on average 1.5142150803461063) internal successors, (3675), 2427 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 3675 transitions. [2021-11-02 22:22:19,937 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 3675 transitions. Word has length 51 [2021-11-02 22:22:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:19,939 INFO L470 AbstractCegarLoop]: Abstraction has 2428 states and 3675 transitions. [2021-11-02 22:22:19,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 3675 transitions. [2021-11-02 22:22:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:22:19,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:19,943 INFO L513 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] [2021-11-02 22:22:19,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:22:19,943 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash 381714532, now seen corresponding path program 1 times [2021-11-02 22:22:19,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:19,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514024972] [2021-11-02 22:22:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:19,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:20,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:20,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514024972] [2021-11-02 22:22:20,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514024972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:20,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:20,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:22:20,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240810209] [2021-11-02 22:22:20,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:20,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:20,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:20,265 INFO L87 Difference]: Start difference. First operand 2428 states and 3675 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:20,870 INFO L93 Difference]: Finished difference Result 6034 states and 9182 transitions. [2021-11-02 22:22:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:22:20,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 22:22:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:20,898 INFO L225 Difference]: With dead ends: 6034 [2021-11-02 22:22:20,899 INFO L226 Difference]: Without dead ends: 3632 [2021-11-02 22:22:20,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:22:20,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2021-11-02 22:22:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2428. [2021-11-02 22:22:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2428 states, 2427 states have (on average 1.5010300782859498) internal successors, (3643), 2427 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 3643 transitions. [2021-11-02 22:22:21,285 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 3643 transitions. Word has length 53 [2021-11-02 22:22:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:21,285 INFO L470 AbstractCegarLoop]: Abstraction has 2428 states and 3643 transitions. [2021-11-02 22:22:21,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 3643 transitions. [2021-11-02 22:22:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:22:21,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:21,287 INFO L513 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] [2021-11-02 22:22:21,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:22:21,288 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:21,289 INFO L85 PathProgramCache]: Analyzing trace with hash 360711877, now seen corresponding path program 1 times [2021-11-02 22:22:21,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:21,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350063802] [2021-11-02 22:22:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:21,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:21,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:21,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350063802] [2021-11-02 22:22:21,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350063802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:21,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:21,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:21,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563588942] [2021-11-02 22:22:21,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:21,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:21,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:21,366 INFO L87 Difference]: Start difference. First operand 2428 states and 3643 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:21,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:21,963 INFO L93 Difference]: Finished difference Result 6880 states and 10269 transitions. [2021-11-02 22:22:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:21,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 22:22:21,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:21,995 INFO L225 Difference]: With dead ends: 6880 [2021-11-02 22:22:21,996 INFO L226 Difference]: Without dead ends: 4478 [2021-11-02 22:22:22,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2021-11-02 22:22:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 4412. [2021-11-02 22:22:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4411 states have (on average 1.4570392201314895) internal successors, (6427), 4411 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 6427 transitions. [2021-11-02 22:22:22,627 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 6427 transitions. Word has length 53 [2021-11-02 22:22:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:22,627 INFO L470 AbstractCegarLoop]: Abstraction has 4412 states and 6427 transitions. [2021-11-02 22:22:22,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 6427 transitions. [2021-11-02 22:22:22,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:22:22,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:22,629 INFO L513 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] [2021-11-02 22:22:22,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:22:22,630 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:22,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1053660785, now seen corresponding path program 1 times [2021-11-02 22:22:22,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:22,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833549160] [2021-11-02 22:22:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:22,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:22,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:22,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833549160] [2021-11-02 22:22:22,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833549160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:22,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:22,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:22:22,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079051128] [2021-11-02 22:22:22,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:22:22,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:22,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:22:22,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:22:22,754 INFO L87 Difference]: Start difference. First operand 4412 states and 6427 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:23,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:23,737 INFO L93 Difference]: Finished difference Result 7437 states and 10829 transitions. [2021-11-02 22:22:23,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:22:23,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 22:22:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:23,795 INFO L225 Difference]: With dead ends: 7437 [2021-11-02 22:22:23,795 INFO L226 Difference]: Without dead ends: 7435 [2021-11-02 22:22:23,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2021-11-02 22:22:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 4540. [2021-11-02 22:22:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4540 states, 4539 states have (on average 1.4371006829698172) internal successors, (6523), 4539 states have internal predecessors, (6523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:24,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4540 states to 4540 states and 6523 transitions. [2021-11-02 22:22:24,628 INFO L78 Accepts]: Start accepts. Automaton has 4540 states and 6523 transitions. Word has length 54 [2021-11-02 22:22:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:24,629 INFO L470 AbstractCegarLoop]: Abstraction has 4540 states and 6523 transitions. [2021-11-02 22:22:24,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4540 states and 6523 transitions. [2021-11-02 22:22:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:22:24,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:24,631 INFO L513 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] [2021-11-02 22:22:24,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:22:24,631 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1226019551, now seen corresponding path program 1 times [2021-11-02 22:22:24,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:24,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777672108] [2021-11-02 22:22:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:24,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:24,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:24,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777672108] [2021-11-02 22:22:24,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777672108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:24,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:24,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:24,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590303748] [2021-11-02 22:22:24,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:24,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:24,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:24,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:24,678 INFO L87 Difference]: Start difference. First operand 4540 states and 6523 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:25,389 INFO L93 Difference]: Finished difference Result 8963 states and 12993 transitions. [2021-11-02 22:22:25,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:25,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 22:22:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:25,410 INFO L225 Difference]: With dead ends: 8963 [2021-11-02 22:22:25,411 INFO L226 Difference]: Without dead ends: 6432 [2021-11-02 22:22:25,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:25,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6432 states. [2021-11-02 22:22:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6432 to 6430. [2021-11-02 22:22:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6430 states, 6429 states have (on average 1.4280603515321202) internal successors, (9181), 6429 states have internal predecessors, (9181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6430 states to 6430 states and 9181 transitions. [2021-11-02 22:22:26,319 INFO L78 Accepts]: Start accepts. Automaton has 6430 states and 9181 transitions. Word has length 54 [2021-11-02 22:22:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:26,320 INFO L470 AbstractCegarLoop]: Abstraction has 6430 states and 9181 transitions. [2021-11-02 22:22:26,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 6430 states and 9181 transitions. [2021-11-02 22:22:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:22:26,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:26,331 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:26,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:22:26,332 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash 595199301, now seen corresponding path program 1 times [2021-11-02 22:22:26,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:26,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509996868] [2021-11-02 22:22:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:26,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:22:26,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:26,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509996868] [2021-11-02 22:22:26,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509996868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:26,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:26,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:22:26,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280255743] [2021-11-02 22:22:26,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:26,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:26,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:26,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:26,476 INFO L87 Difference]: Start difference. First operand 6430 states and 9181 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:29,159 INFO L93 Difference]: Finished difference Result 33272 states and 47490 transitions. [2021-11-02 22:22:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:22:29,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 22:22:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:29,237 INFO L225 Difference]: With dead ends: 33272 [2021-11-02 22:22:29,237 INFO L226 Difference]: Without dead ends: 26870 [2021-11-02 22:22:29,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:22:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26870 states. [2021-11-02 22:22:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26870 to 12830. [2021-11-02 22:22:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12830 states, 12829 states have (on average 1.4215449372515394) internal successors, (18237), 12829 states have internal predecessors, (18237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12830 states to 12830 states and 18237 transitions. [2021-11-02 22:22:30,714 INFO L78 Accepts]: Start accepts. Automaton has 12830 states and 18237 transitions. Word has length 77 [2021-11-02 22:22:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:30,714 INFO L470 AbstractCegarLoop]: Abstraction has 12830 states and 18237 transitions. [2021-11-02 22:22:30,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 12830 states and 18237 transitions. [2021-11-02 22:22:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:22:30,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:30,719 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:30,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:22:30,720 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash -558746805, now seen corresponding path program 1 times [2021-11-02 22:22:30,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:30,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279181167] [2021-11-02 22:22:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:30,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 22:22:30,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:30,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279181167] [2021-11-02 22:22:30,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279181167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:30,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:30,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:22:30,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525376577] [2021-11-02 22:22:30,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:30,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:30,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:30,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:30,803 INFO L87 Difference]: Start difference. First operand 12830 states and 18237 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:34,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:34,057 INFO L93 Difference]: Finished difference Result 39672 states and 56546 transitions. [2021-11-02 22:22:34,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:22:34,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 22:22:34,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:34,148 INFO L225 Difference]: With dead ends: 39672 [2021-11-02 22:22:34,148 INFO L226 Difference]: Without dead ends: 33270 [2021-11-02 22:22:34,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:22:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33270 states. [2021-11-02 22:22:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33270 to 22446. [2021-11-02 22:22:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22446 states, 22445 states have (on average 1.414167966139452) internal successors, (31741), 22445 states have internal predecessors, (31741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:36,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22446 states to 22446 states and 31741 transitions. [2021-11-02 22:22:36,628 INFO L78 Accepts]: Start accepts. Automaton has 22446 states and 31741 transitions. Word has length 77 [2021-11-02 22:22:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:36,629 INFO L470 AbstractCegarLoop]: Abstraction has 22446 states and 31741 transitions. [2021-11-02 22:22:36,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 22446 states and 31741 transitions. [2021-11-02 22:22:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:22:36,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:36,633 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:36,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:22:36,634 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:36,635 INFO L85 PathProgramCache]: Analyzing trace with hash -262701377, now seen corresponding path program 1 times [2021-11-02 22:22:36,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:36,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166454814] [2021-11-02 22:22:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:36,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:22:36,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:36,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166454814] [2021-11-02 22:22:36,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166454814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:36,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:36,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:22:36,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257574400] [2021-11-02 22:22:36,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:36,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:36,754 INFO L87 Difference]: Start difference. First operand 22446 states and 31741 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:40,487 INFO L93 Difference]: Finished difference Result 46072 states and 65602 transitions. [2021-11-02 22:22:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:22:40,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 22:22:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:40,598 INFO L225 Difference]: With dead ends: 46072 [2021-11-02 22:22:40,599 INFO L226 Difference]: Without dead ends: 39670 [2021-11-02 22:22:40,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:22:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39670 states. [2021-11-02 22:22:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39670 to 28846. [2021-11-02 22:22:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28846 states, 28845 states have (on average 1.414352574102964) internal successors, (40797), 28845 states have internal predecessors, (40797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28846 states to 28846 states and 40797 transitions. [2021-11-02 22:22:43,781 INFO L78 Accepts]: Start accepts. Automaton has 28846 states and 40797 transitions. Word has length 77 [2021-11-02 22:22:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:43,782 INFO L470 AbstractCegarLoop]: Abstraction has 28846 states and 40797 transitions. [2021-11-02 22:22:43,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 28846 states and 40797 transitions. [2021-11-02 22:22:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 22:22:43,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:43,786 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:43,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:22:43,787 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:43,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:43,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2055185859, now seen corresponding path program 1 times [2021-11-02 22:22:43,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:43,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869342845] [2021-11-02 22:22:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:43,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:22:43,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:43,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869342845] [2021-11-02 22:22:43,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869342845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:43,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:43,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:22:43,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085508415] [2021-11-02 22:22:43,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:22:43,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:43,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:22:43,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:22:43,903 INFO L87 Difference]: Start difference. First operand 28846 states and 40797 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:48,260 INFO L93 Difference]: Finished difference Result 50488 states and 71906 transitions. [2021-11-02 22:22:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:22:48,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-02 22:22:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:48,353 INFO L225 Difference]: With dead ends: 50488 [2021-11-02 22:22:48,353 INFO L226 Difference]: Without dead ends: 46070 [2021-11-02 22:22:48,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:22:48,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46070 states. [2021-11-02 22:22:51,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46070 to 33262. [2021-11-02 22:22:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33262 states, 33261 states have (on average 1.417065031117525) internal successors, (47133), 33261 states have internal predecessors, (47133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33262 states to 33262 states and 47133 transitions. [2021-11-02 22:22:52,055 INFO L78 Accepts]: Start accepts. Automaton has 33262 states and 47133 transitions. Word has length 78 [2021-11-02 22:22:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:52,055 INFO L470 AbstractCegarLoop]: Abstraction has 33262 states and 47133 transitions. [2021-11-02 22:22:52,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:52,055 INFO L276 IsEmpty]: Start isEmpty. Operand 33262 states and 47133 transitions. [2021-11-02 22:22:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:22:52,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:52,060 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:52,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:22:52,061 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:52,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:52,061 INFO L85 PathProgramCache]: Analyzing trace with hash -144941472, now seen corresponding path program 1 times [2021-11-02 22:22:52,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:52,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736880287] [2021-11-02 22:22:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:52,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:52,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:52,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736880287] [2021-11-02 22:22:52,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736880287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:52,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:52,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:52,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119933915] [2021-11-02 22:22:52,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:52,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:52,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:52,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:52,137 INFO L87 Difference]: Start difference. First operand 33262 states and 47133 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:55,036 INFO L93 Difference]: Finished difference Result 57586 states and 82021 transitions. [2021-11-02 22:22:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:55,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:22:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:55,082 INFO L225 Difference]: With dead ends: 57586 [2021-11-02 22:22:55,082 INFO L226 Difference]: Without dead ends: 24352 [2021-11-02 22:22:55,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:55,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24352 states. [2021-11-02 22:22:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24352 to 24350. [2021-11-02 22:22:57,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24350 states, 24349 states have (on average 1.4194422768902213) internal successors, (34562), 24349 states have internal predecessors, (34562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24350 states to 24350 states and 34562 transitions. [2021-11-02 22:22:57,785 INFO L78 Accepts]: Start accepts. Automaton has 24350 states and 34562 transitions. Word has length 79 [2021-11-02 22:22:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:57,786 INFO L470 AbstractCegarLoop]: Abstraction has 24350 states and 34562 transitions. [2021-11-02 22:22:57,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 24350 states and 34562 transitions. [2021-11-02 22:22:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:22:57,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:57,791 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:57,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:22:57,791 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:57,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1559581035, now seen corresponding path program 1 times [2021-11-02 22:22:57,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:57,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225894284] [2021-11-02 22:22:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:57,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:58,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:58,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225894284] [2021-11-02 22:22:58,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225894284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:58,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804373310] [2021-11-02 22:22:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:58,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:58,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:58,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:22:58,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:22:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:58,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:22:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:59,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804373310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:59,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:22:59,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-11-02 22:22:59,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416529086] [2021-11-02 22:22:59,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:22:59,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:22:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:22:59,178 INFO L87 Difference]: Start difference. First operand 24350 states and 34562 transitions. Second operand has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 14 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:15,423 INFO L93 Difference]: Finished difference Result 126803 states and 177865 transitions. [2021-11-02 22:23:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-02 22:23:15,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 14 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:23:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:15,623 INFO L225 Difference]: With dead ends: 126803 [2021-11-02 22:23:15,624 INFO L226 Difference]: Without dead ends: 102513 [2021-11-02 22:23:15,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=871, Invalid=4099, Unknown=0, NotChecked=0, Total=4970 [2021-11-02 22:23:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102513 states. [2021-11-02 22:23:21,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102513 to 39257. [2021-11-02 22:23:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39257 states, 39256 states have (on average 1.407530059099246) internal successors, (55254), 39256 states have internal predecessors, (55254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39257 states to 39257 states and 55254 transitions. [2021-11-02 22:23:21,446 INFO L78 Accepts]: Start accepts. Automaton has 39257 states and 55254 transitions. Word has length 79 [2021-11-02 22:23:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:21,446 INFO L470 AbstractCegarLoop]: Abstraction has 39257 states and 55254 transitions. [2021-11-02 22:23:21,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 14 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 39257 states and 55254 transitions. [2021-11-02 22:23:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 22:23:21,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:21,450 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:23:21,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-02 22:23:21,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:23:21,666 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:23:21,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:21,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1183040057, now seen corresponding path program 1 times [2021-11-02 22:23:21,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:21,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034992507] [2021-11-02 22:23:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:21,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:23:21,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:21,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034992507] [2021-11-02 22:23:21,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034992507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:23:21,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191155620] [2021-11-02 22:23:21,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:21,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:23:21,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:23:21,894 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:23:21,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bcaf0ab-1362-40a1-b48c-20044f2ef4b9/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:23:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:22,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:23:22,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:23:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:23:23,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191155620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:23:23,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:23:23,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-02 22:23:23,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313488001] [2021-11-02 22:23:23,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:23:23,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:23:23,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:23:23,673 INFO L87 Difference]: Start difference. First operand 39257 states and 55254 transitions. Second operand has 17 states, 17 states have (on average 9.0) internal successors, (153), 16 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)