./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc --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 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:55:30,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:55:30,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:55:30,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:55:30,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:55:30,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:55:30,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:55:30,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:55:30,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:55:30,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:55:30,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:55:30,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:55:30,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:55:30,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:55:30,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:55:30,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:55:30,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:55:30,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:55:30,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:55:30,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:55:30,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:55:30,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:55:30,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:55:30,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:55:30,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:55:30,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:55:30,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:55:30,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:55:30,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:55:30,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:55:30,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:55:30,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:55:30,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:55:30,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:55:30,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:55:30,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:55:30,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:55:30,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:55:30,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:55:30,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:55:30,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:55:30,839 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:55:30,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:55:30,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:55:30,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:55:30,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:55:30,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:55:30,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:55:30,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:55:30,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:55:30,865 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:55:30,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:55:30,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:55:30,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:55:30,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:55:30,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:55:30,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:55:30,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:55:30,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:55:30,867 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:55:30,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:55:30,868 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:55:30,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:55:30,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:55:30,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:55:30,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:55:30,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:55:30,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:55:30,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:55:30,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:55:30,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:55:30,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:55:30,870 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:55:30,871 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:55:30,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:55:30,871 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_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e [2022-11-02 20:55:31,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:55:31,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:55:31,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:55:31,212 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:55:31,213 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:55:31,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2022-11-02 20:55:31,309 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/data/18440ac65/5b57ad8bf07d4c37b769d2f841ac36e8/FLAG6ce5d751c [2022-11-02 20:55:31,777 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:55:31,777 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2022-11-02 20:55:31,784 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/data/18440ac65/5b57ad8bf07d4c37b769d2f841ac36e8/FLAG6ce5d751c [2022-11-02 20:55:32,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/data/18440ac65/5b57ad8bf07d4c37b769d2f841ac36e8 [2022-11-02 20:55:32,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:55:32,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:55:32,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:55:32,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:55:32,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:55:32,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679e41c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32, skipping insertion in model container [2022-11-02 20:55:32,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:55:32,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:55:32,390 WARN L230 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_4dfacbfd-9551-4bea-a395-1ec1ca577785/sv-benchmarks/c/loops-crafted-1/Mono4_1.c[311,324] [2022-11-02 20:55:32,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:55:32,432 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:55:32,446 WARN L230 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_4dfacbfd-9551-4bea-a395-1ec1ca577785/sv-benchmarks/c/loops-crafted-1/Mono4_1.c[311,324] [2022-11-02 20:55:32,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:55:32,466 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:55:32,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32 WrapperNode [2022-11-02 20:55:32,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:55:32,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:55:32,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:55:32,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:55:32,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,501 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2022-11-02 20:55:32,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:55:32,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:55:32,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:55:32,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:55:32,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,524 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:55:32,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:55:32,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:55:32,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:55:32,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (1/1) ... [2022-11-02 20:55:32,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:55:32,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:32,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:55:32,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:55:32,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:55:32,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:55:32,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:55:32,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:55:32,689 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:55:32,691 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:55:32,800 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:55:32,806 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:55:32,806 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:55:32,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:55:32 BoogieIcfgContainer [2022-11-02 20:55:32,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:55:32,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:55:32,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:55:32,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:55:32,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:55:32" (1/3) ... [2022-11-02 20:55:32,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53526c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:55:32, skipping insertion in model container [2022-11-02 20:55:32,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:32" (2/3) ... [2022-11-02 20:55:32,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53526c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:55:32, skipping insertion in model container [2022-11-02 20:55:32,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:55:32" (3/3) ... [2022-11-02 20:55:32,819 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2022-11-02 20:55:32,838 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:55:32,838 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:55:32,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:55:32,895 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@107e5bb5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:55:32,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:55:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-11-02 20:55:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:55:32,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:32,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:55:32,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2022-11-02 20:55:32,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:32,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307478507] [2022-11-02 20:55:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:32,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:33,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:33,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307478507] [2022-11-02 20:55:33,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307478507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:33,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:33,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:55:33,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611616396] [2022-11-02 20:55:33,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:33,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:55:33,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:33,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:55:33,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:55:33,103 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-02 20:55:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:33,117 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-02 20:55:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:55:33,119 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-11-02 20:55:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:33,127 INFO L225 Difference]: With dead ends: 20 [2022-11-02 20:55:33,127 INFO L226 Difference]: Without dead ends: 8 [2022-11-02 20:55:33,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:55:33,134 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:33,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-02 20:55:33,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-02 20:55:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2022-11-02 20:55:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-02 20:55:33,168 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-11-02 20:55:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:33,168 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-02 20:55:33,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-02 20:55:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-02 20:55:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:55:33,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:33,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:55:33,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:55:33,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2022-11-02 20:55:33,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:33,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309385953] [2022-11-02 20:55:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:33,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:33,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:33,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309385953] [2022-11-02 20:55:33,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309385953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:33,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:33,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:55:33,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547531761] [2022-11-02 20:55:33,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:33,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:55:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:55:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:33,250 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:55:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:33,270 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2022-11-02 20:55:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:55:33,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-02 20:55:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:33,272 INFO L225 Difference]: With dead ends: 16 [2022-11-02 20:55:33,272 INFO L226 Difference]: Without dead ends: 10 [2022-11-02 20:55:33,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:33,274 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:33,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-02 20:55:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-02 20:55:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-11-02 20:55:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-02 20:55:33,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-11-02 20:55:33,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:33,280 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-02 20:55:33,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:55:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-02 20:55:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:55:33,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:33,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:33,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:55:33,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:33,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:33,284 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2022-11-02 20:55:33,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:33,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821645438] [2022-11-02 20:55:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:33,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:33,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:33,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821645438] [2022-11-02 20:55:33,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821645438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:33,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735063928] [2022-11-02 20:55:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:33,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:33,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:33,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:33,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:55:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:55:33,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:33,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:33,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735063928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:33,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:33,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-02 20:55:33,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620425463] [2022-11-02 20:55:33,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:33,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:55:33,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:55:33,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:55:33,677 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-02 20:55:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:33,746 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2022-11-02 20:55:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:55:33,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 8 [2022-11-02 20:55:33,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:33,749 INFO L225 Difference]: With dead ends: 21 [2022-11-02 20:55:33,749 INFO L226 Difference]: Without dead ends: 15 [2022-11-02 20:55:33,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:55:33,754 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:33,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-02 20:55:33,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-02 20:55:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2022-11-02 20:55:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-02 20:55:33,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-11-02 20:55:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:33,767 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-02 20:55:33,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-02 20:55:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-02 20:55:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:55:33,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:33,768 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:33,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:33,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:33,983 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:33,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:33,984 INFO L85 PathProgramCache]: Analyzing trace with hash 598153473, now seen corresponding path program 1 times [2022-11-02 20:55:33,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:33,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961895757] [2022-11-02 20:55:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:33,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:55:34,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:34,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961895757] [2022-11-02 20:55:34,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961895757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:34,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361347027] [2022-11-02 20:55:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:34,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:34,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:34,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:34,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:55:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:34,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:55:34,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:55:34,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:55:34,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361347027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:34,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:34,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-02 20:55:34,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884408376] [2022-11-02 20:55:34,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:34,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:55:34,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:34,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:55:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:55:34,328 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2022-11-02 20:55:34,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:34,404 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-11-02 20:55:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:55:34,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 14 [2022-11-02 20:55:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:34,406 INFO L225 Difference]: With dead ends: 32 [2022-11-02 20:55:34,406 INFO L226 Difference]: Without dead ends: 23 [2022-11-02 20:55:34,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:55:34,408 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:34,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:55:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-02 20:55:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-02 20:55:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2022-11-02 20:55:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-11-02 20:55:34,414 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2022-11-02 20:55:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:34,414 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-11-02 20:55:34,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2022-11-02 20:55:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-11-02 20:55:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:55:34,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:34,416 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:34,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:34,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:34,617 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:34,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 2 times [2022-11-02 20:55:34,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:34,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805199582] [2022-11-02 20:55:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:34,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:55:34,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:34,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805199582] [2022-11-02 20:55:34,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805199582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:34,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999937579] [2022-11-02 20:55:34,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:55:34,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:34,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:34,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:34,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:55:34,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:55:34,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:55:34,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:55:35,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:55:35,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999937579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:35,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:35,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-02 20:55:35,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485321640] [2022-11-02 20:55:35,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:35,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:55:35,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:35,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:55:35,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:55:35,166 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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) [2022-11-02 20:55:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:35,247 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-11-02 20:55:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:55:35,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 22 [2022-11-02 20:55:35,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:35,248 INFO L225 Difference]: With dead ends: 48 [2022-11-02 20:55:35,248 INFO L226 Difference]: Without dead ends: 39 [2022-11-02 20:55:35,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:55:35,250 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:35,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:55:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-02 20:55:35,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-02 20:55:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 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) [2022-11-02 20:55:35,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-11-02 20:55:35,257 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2022-11-02 20:55:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:35,257 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-11-02 20:55:35,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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) [2022-11-02 20:55:35,258 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-11-02 20:55:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 20:55:35,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:35,259 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:35,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:35,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:35,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:35,484 INFO L85 PathProgramCache]: Analyzing trace with hash -713215707, now seen corresponding path program 3 times [2022-11-02 20:55:35,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:35,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850696935] [2022-11-02 20:55:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:35,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:55:35,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:35,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850696935] [2022-11-02 20:55:35,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850696935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:35,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643200159] [2022-11-02 20:55:35,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:55:35,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:35,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:35,870 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:35,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:55:35,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:55:35,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:35,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:55:35,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-02 20:55:36,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-02 20:55:36,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643200159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:36,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:36,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 26 [2022-11-02 20:55:36,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226383305] [2022-11-02 20:55:36,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:36,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:55:36,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:36,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:55:36,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:55:36,257 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 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) [2022-11-02 20:55:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:36,762 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2022-11-02 20:55:36,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-02 20:55:36,764 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 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 38 [2022-11-02 20:55:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:36,765 INFO L225 Difference]: With dead ends: 84 [2022-11-02 20:55:36,765 INFO L226 Difference]: Without dead ends: 67 [2022-11-02 20:55:36,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=586, Invalid=1670, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:55:36,767 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 65 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:36,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 50 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:55:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-02 20:55:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2022-11-02 20:55:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 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) [2022-11-02 20:55:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-11-02 20:55:36,777 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 38 [2022-11-02 20:55:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:36,777 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-11-02 20:55:36,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 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) [2022-11-02 20:55:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-11-02 20:55:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:55:36,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:36,779 INFO L195 NwaCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:36,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:36,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:36,992 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash 160479836, now seen corresponding path program 4 times [2022-11-02 20:55:36,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:36,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348390932] [2022-11-02 20:55:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:36,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:55:37,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:37,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348390932] [2022-11-02 20:55:37,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348390932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:37,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671789540] [2022-11-02 20:55:37,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:55:37,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:37,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:37,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:37,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:55:37,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:55:37,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:37,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:55:37,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:55:37,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:55:37,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671789540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:37,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:37,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-11-02 20:55:37,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829302330] [2022-11-02 20:55:37,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:37,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:55:37,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:55:37,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:55:37,937 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 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) [2022-11-02 20:55:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:38,061 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2022-11-02 20:55:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:55:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 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 [2022-11-02 20:55:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:38,063 INFO L225 Difference]: With dead ends: 98 [2022-11-02 20:55:38,063 INFO L226 Difference]: Without dead ends: 83 [2022-11-02 20:55:38,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:55:38,064 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:38,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:55:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-02 20:55:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-02 20:55:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 82 states have internal predecessors, (89), 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) [2022-11-02 20:55:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2022-11-02 20:55:38,075 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 48 [2022-11-02 20:55:38,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:38,075 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2022-11-02 20:55:38,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 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) [2022-11-02 20:55:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2022-11-02 20:55:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-02 20:55:38,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:38,078 INFO L195 NwaCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:38,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:38,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:55:38,302 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:38,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:38,303 INFO L85 PathProgramCache]: Analyzing trace with hash 722625007, now seen corresponding path program 5 times [2022-11-02 20:55:38,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:38,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420002117] [2022-11-02 20:55:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:38,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:55:39,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:39,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420002117] [2022-11-02 20:55:39,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420002117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:39,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350238804] [2022-11-02 20:55:39,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:55:39,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:39,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:39,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:39,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:55:39,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-11-02 20:55:39,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:39,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:55:39,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:55:39,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:55:41,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350238804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:41,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:41,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-11-02 20:55:41,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077867937] [2022-11-02 20:55:41,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:41,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-02 20:55:41,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:41,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-02 20:55:41,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-11-02 20:55:41,226 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 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) [2022-11-02 20:55:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:41,488 INFO L93 Difference]: Finished difference Result 166 states and 211 transitions. [2022-11-02 20:55:41,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-02 20:55:41,488 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 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 82 [2022-11-02 20:55:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:41,490 INFO L225 Difference]: With dead ends: 166 [2022-11-02 20:55:41,490 INFO L226 Difference]: Without dead ends: 151 [2022-11-02 20:55:41,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-11-02 20:55:41,493 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:41,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:55:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-02 20:55:41,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-02 20:55:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0466666666666666) internal successors, (157), 150 states have internal predecessors, (157), 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) [2022-11-02 20:55:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 157 transitions. [2022-11-02 20:55:41,510 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 157 transitions. Word has length 82 [2022-11-02 20:55:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:41,510 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 157 transitions. [2022-11-02 20:55:41,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 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) [2022-11-02 20:55:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 157 transitions. [2022-11-02 20:55:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-02 20:55:41,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:41,513 INFO L195 NwaCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:41,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:41,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:41,727 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:41,727 INFO L85 PathProgramCache]: Analyzing trace with hash -682364203, now seen corresponding path program 6 times [2022-11-02 20:55:41,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:41,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729433249] [2022-11-02 20:55:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:41,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:55:45,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729433249] [2022-11-02 20:55:45,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729433249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:45,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031397885] [2022-11-02 20:55:45,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:55:45,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:45,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:45,195 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:45,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:55:45,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-11-02 20:55:45,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:45,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:55:45,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 762 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-11-02 20:55:45,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 762 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-11-02 20:55:46,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031397885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:46,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:46,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 11, 11] total 86 [2022-11-02 20:55:46,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732498628] [2022-11-02 20:55:46,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:46,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-02 20:55:46,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:46,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-02 20:55:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2480, Invalid=4830, Unknown=0, NotChecked=0, Total=7310 [2022-11-02 20:55:46,477 INFO L87 Difference]: Start difference. First operand 151 states and 157 transitions. Second operand has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 86 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) [2022-11-02 20:55:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:50,345 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2022-11-02 20:55:50,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-02 20:55:50,346 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 86 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) Word has length 150 [2022-11-02 20:55:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:50,349 INFO L225 Difference]: With dead ends: 230 [2022-11-02 20:55:50,353 INFO L226 Difference]: Without dead ends: 199 [2022-11-02 20:55:50,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4615 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8258, Invalid=19798, Unknown=0, NotChecked=0, Total=28056 [2022-11-02 20:55:50,362 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 226 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:50,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 67 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:55:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-02 20:55:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2022-11-02 20:55:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0892857142857142) internal successors, (183), 168 states have internal predecessors, (183), 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) [2022-11-02 20:55:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2022-11-02 20:55:50,399 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 150 [2022-11-02 20:55:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:50,400 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2022-11-02 20:55:50,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 86 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) [2022-11-02 20:55:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2022-11-02 20:55:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-02 20:55:50,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:50,409 INFO L195 NwaCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:50,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:50,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:50,631 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:50,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1511260128, now seen corresponding path program 7 times [2022-11-02 20:55:50,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:50,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361249463] [2022-11-02 20:55:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:50,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-02 20:55:53,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361249463] [2022-11-02 20:55:53,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361249463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314449493] [2022-11-02 20:55:53,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:55:53,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:53,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:53,839 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:53,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:55:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:53,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-02 20:55:53,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-02 20:55:54,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-02 20:56:00,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314449493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:00,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:00,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2022-11-02 20:56:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488215136] [2022-11-02 20:56:00,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:00,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-11-02 20:56:00,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:00,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-11-02 20:56:00,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-11-02 20:56:00,406 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 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) [2022-11-02 20:56:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:01,021 INFO L93 Difference]: Finished difference Result 338 states and 434 transitions. [2022-11-02 20:56:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-02 20:56:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 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 168 [2022-11-02 20:56:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:01,027 INFO L225 Difference]: With dead ends: 338 [2022-11-02 20:56:01,027 INFO L226 Difference]: Without dead ends: 307 [2022-11-02 20:56:01,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-11-02 20:56:01,031 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:01,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:56:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-02 20:56:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-11-02 20:56:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.0490196078431373) internal successors, (321), 306 states have internal predecessors, (321), 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) [2022-11-02 20:56:01,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 321 transitions. [2022-11-02 20:56:01,054 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 321 transitions. Word has length 168 [2022-11-02 20:56:01,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:01,055 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 321 transitions. [2022-11-02 20:56:01,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 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) [2022-11-02 20:56:01,056 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 321 transitions. [2022-11-02 20:56:01,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-11-02 20:56:01,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:01,059 INFO L195 NwaCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:01,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:56:01,279 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash 55731535, now seen corresponding path program 8 times [2022-11-02 20:56:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:01,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408218371] [2022-11-02 20:56:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:01,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-02 20:56:12,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:12,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408218371] [2022-11-02 20:56:12,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408218371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:12,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341864679] [2022-11-02 20:56:12,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:56:12,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:12,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:12,435 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:12,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:56:12,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:56:12,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-02 20:56:12,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-02 20:56:13,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-02 20:56:34,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341864679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:34,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:34,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2022-11-02 20:56:34,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473117831] [2022-11-02 20:56:34,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:34,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2022-11-02 20:56:34,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:34,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2022-11-02 20:56:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-11-02 20:56:34,990 INFO L87 Difference]: Start difference. First operand 307 states and 321 transitions. Second operand has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 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) [2022-11-02 20:56:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:36,846 INFO L93 Difference]: Finished difference Result 614 states and 779 transitions. [2022-11-02 20:56:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-11-02 20:56:36,847 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 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 306 [2022-11-02 20:56:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:36,849 INFO L225 Difference]: With dead ends: 614 [2022-11-02 20:56:36,849 INFO L226 Difference]: Without dead ends: 583 [2022-11-02 20:56:36,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-11-02 20:56:36,855 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:36,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:56:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-02 20:56:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2022-11-02 20:56:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.0257731958762886) internal successors, (597), 582 states have internal predecessors, (597), 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) [2022-11-02 20:56:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 597 transitions. [2022-11-02 20:56:36,881 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 597 transitions. Word has length 306 [2022-11-02 20:56:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:36,882 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 597 transitions. [2022-11-02 20:56:36,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 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) [2022-11-02 20:56:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 597 transitions. [2022-11-02 20:56:36,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-11-02 20:56:36,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:36,897 INFO L195 NwaCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:36,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:37,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:56:37,111 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:37,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1666677907, now seen corresponding path program 9 times [2022-11-02 20:56:37,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:37,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739362835] [2022-11-02 20:56:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:37,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-02 20:57:21,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:21,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739362835] [2022-11-02 20:57:21,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739362835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:21,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542079458] [2022-11-02 20:57:21,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:57:21,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:21,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:21,435 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:21,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:57:21,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-11-02 20:57:21,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:57:21,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:57:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 0 proven. 7594 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-11-02 20:57:24,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 0 proven. 7594 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-11-02 20:57:27,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542079458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:27,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:57:27,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 19, 19] total 310 [2022-11-02 20:57:27,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902557744] [2022-11-02 20:57:27,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:27,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 310 states [2022-11-02 20:57:27,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:27,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 310 interpolants. [2022-11-02 20:57:27,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38744, Invalid=57046, Unknown=0, NotChecked=0, Total=95790 [2022-11-02 20:57:27,360 INFO L87 Difference]: Start difference. First operand 583 states and 597 transitions. Second operand has 310 states, 310 states have (on average 2.009677419354839) internal successors, (623), 310 states have internal predecessors, (623), 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) [2022-11-02 20:58:09,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:09,400 INFO L93 Difference]: Finished difference Result 734 states and 813 transitions. [2022-11-02 20:58:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2022-11-02 20:58:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 310 states, 310 states have (on average 2.009677419354839) internal successors, (623), 310 states have internal predecessors, (623), 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 582 [2022-11-02 20:58:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:09,404 INFO L225 Difference]: With dead ends: 734 [2022-11-02 20:58:09,405 INFO L226 Difference]: Without dead ends: 671 [2022-11-02 20:58:09,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1745 GetRequests, 1130 SyntacticMatches, 1 SemanticMatches, 614 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56387 ImplicationChecksByTransitivity, 69.7s TimeCoverageRelationStatistics Valid=123926, Invalid=254914, Unknown=0, NotChecked=0, Total=378840 [2022-11-02 20:58:09,426 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 819 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:09,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 116 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:58:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-11-02 20:58:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 617. [2022-11-02 20:58:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.0503246753246753) internal successors, (647), 616 states have internal predecessors, (647), 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) [2022-11-02 20:58:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 647 transitions. [2022-11-02 20:58:09,455 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 647 transitions. Word has length 582 [2022-11-02 20:58:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:09,456 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 647 transitions. [2022-11-02 20:58:09,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 310 states, 310 states have (on average 2.009677419354839) internal successors, (623), 310 states have internal predecessors, (623), 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) [2022-11-02 20:58:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 647 transitions. [2022-11-02 20:58:09,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-11-02 20:58:09,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:09,473 INFO L195 NwaCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:09,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:09,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:58:09,687 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:58:09,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:09,687 INFO L85 PathProgramCache]: Analyzing trace with hash 122564320, now seen corresponding path program 10 times [2022-11-02 20:58:09,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:09,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286252887] [2022-11-02 20:58:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:09,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-11-02 20:58:55,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:55,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286252887] [2022-11-02 20:58:55,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286252887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:55,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354606918] [2022-11-02 20:58:55,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:58:55,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:55,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:55,580 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:55,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfacbfd-9551-4bea-a395-1ec1ca577785/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:58:55,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:58:55,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 277 conjunts are in the unsatisfiable core [2022-11-02 20:58:55,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-11-02 20:58:56,666 INFO L328 TraceCheckSpWp]: Computing backward predicates...