./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/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_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/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_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/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 e1972ee33272415a52c6f0d8a1f799e9d488ad771872c0cf36a214b07ea597fd --- 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 19:56:23,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 19:56:23,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 19:56:23,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 19:56:23,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 19:56:23,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 19:56:23,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 19:56:23,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 19:56:23,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 19:56:23,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 19:56:23,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 19:56:23,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 19:56:23,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 19:56:23,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 19:56:23,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 19:56:23,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 19:56:23,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 19:56:23,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 19:56:23,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 19:56:23,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 19:56:23,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 19:56:23,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 19:56:23,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 19:56:23,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 19:56:23,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 19:56:23,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 19:56:23,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 19:56:23,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 19:56:23,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 19:56:23,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 19:56:23,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 19:56:23,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 19:56:23,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 19:56:23,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 19:56:23,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 19:56:23,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 19:56:23,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 19:56:23,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 19:56:23,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 19:56:23,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 19:56:23,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 19:56:23,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 19:56:23,413 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 19:56:23,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 19:56:23,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 19:56:23,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 19:56:23,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 19:56:23,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 19:56:23,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 19:56:23,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 19:56:23,416 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 19:56:23,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 19:56:23,417 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 19:56:23,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 19:56:23,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 19:56:23,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 19:56:23,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 19:56:23,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 19:56:23,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 19:56:23,418 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 19:56:23,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 19:56:23,418 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 19:56:23,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 19:56:23,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 19:56:23,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 19:56:23,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 19:56:23,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 19:56:23,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 19:56:23,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 19:56:23,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 19:56:23,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 19:56:23,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 19:56:23,422 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 19:56:23,422 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 19:56:23,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 19:56:23,422 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_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1972ee33272415a52c6f0d8a1f799e9d488ad771872c0cf36a214b07ea597fd [2022-11-02 19:56:23,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 19:56:23,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 19:56:23,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 19:56:23,713 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 19:56:23,714 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 19:56:23,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2022-11-02 19:56:23,785 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/data/9b8a826d1/db7e32c2d9404878baeac8c09353ffa8/FLAGc36fb7d7b [2022-11-02 19:56:24,221 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 19:56:24,222 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2022-11-02 19:56:24,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/data/9b8a826d1/db7e32c2d9404878baeac8c09353ffa8/FLAGc36fb7d7b [2022-11-02 19:56:24,629 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/data/9b8a826d1/db7e32c2d9404878baeac8c09353ffa8 [2022-11-02 19:56:24,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 19:56:24,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 19:56:24,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 19:56:24,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 19:56:24,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 19:56:24,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8bb4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24, skipping insertion in model container [2022-11-02 19:56:24,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 19:56:24,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 19:56:24,817 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_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2022-11-02 19:56:24,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 19:56:24,844 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 19:56:24,857 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_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2022-11-02 19:56:24,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 19:56:24,876 INFO L208 MainTranslator]: Completed translation [2022-11-02 19:56:24,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24 WrapperNode [2022-11-02 19:56:24,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 19:56:24,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 19:56:24,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 19:56:24,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 19:56:24,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,906 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-11-02 19:56:24,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 19:56:24,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 19:56:24,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 19:56:24,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 19:56:24,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,923 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 19:56:24,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 19:56:24,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 19:56:24,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 19:56:24,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (1/1) ... [2022-11-02 19:56:24,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 19:56:24,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:56:24,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 19:56:24,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 19:56:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 19:56:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 19:56:24,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 19:56:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 19:56:25,055 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 19:56:25,056 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 19:56:25,169 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 19:56:25,176 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 19:56:25,179 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 19:56:25,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:56:25 BoogieIcfgContainer [2022-11-02 19:56:25,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 19:56:25,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 19:56:25,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 19:56:25,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 19:56:25,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 07:56:24" (1/3) ... [2022-11-02 19:56:25,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a18b73b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:56:25, skipping insertion in model container [2022-11-02 19:56:25,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:24" (2/3) ... [2022-11-02 19:56:25,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a18b73b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:56:25, skipping insertion in model container [2022-11-02 19:56:25,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:56:25" (3/3) ... [2022-11-02 19:56:25,191 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2022-11-02 19:56:25,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 19:56:25,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 19:56:25,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 19:56:25,294 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;@bf8e1bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 19:56:25,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 19:56:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 19:56:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 19:56:25,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:56:25,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 19:56:25,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:56:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:56:25,320 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-11-02 19:56:25,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:56:25,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021597783] [2022-11-02 19:56:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:56:25,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:56:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:56:25,510 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 19:56:25,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:56:25,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021597783] [2022-11-02 19:56:25,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021597783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:56:25,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:56:25,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 19:56:25,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479201114] [2022-11-02 19:56:25,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:56:25,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 19:56:25,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:56:25,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 19:56:25,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 19:56:25,564 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 19:56:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:56:25,578 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-11-02 19:56:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 19:56:25,580 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 19:56:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:56:25,587 INFO L225 Difference]: With dead ends: 21 [2022-11-02 19:56:25,588 INFO L226 Difference]: Without dead ends: 9 [2022-11-02 19:56:25,590 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 19:56:25,594 INFO L413 NwaCegarLoop]: 14 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, 14 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 19:56:25,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:56:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-02 19:56:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-02 19:56:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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 19:56:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-02 19:56:25,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-11-02 19:56:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:56:25,625 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-02 19:56:25,626 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 19:56:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-02 19:56:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 19:56:25,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:56:25,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 19:56:25,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 19:56:25,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:56:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:56:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-11-02 19:56:25,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:56:25,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790606616] [2022-11-02 19:56:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:56:25,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:56:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:56:25,805 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 19:56:25,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:56:25,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790606616] [2022-11-02 19:56:25,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790606616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:56:25,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:56:25,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 19:56:25,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500182386] [2022-11-02 19:56:25,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:56:25,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 19:56:25,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:56:25,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 19:56:25,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 19:56:25,811 INFO L87 Difference]: Start difference. First operand 9 states and 10 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 19:56:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:56:25,834 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-11-02 19:56:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 19:56:25,835 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 19:56:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:56:25,835 INFO L225 Difference]: With dead ends: 19 [2022-11-02 19:56:25,835 INFO L226 Difference]: Without dead ends: 12 [2022-11-02 19:56:25,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 19:56:25,837 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:56:25,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:56:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-02 19:56:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-02 19:56:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 19:56:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-02 19:56:25,860 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-11-02 19:56:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:56:25,860 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-02 19:56:25,860 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 19:56:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-02 19:56:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 19:56:25,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:56:25,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:56:25,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 19:56:25,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:56:25,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:56:25,863 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2022-11-02 19:56:25,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:56:25,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883115141] [2022-11-02 19:56:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:56:25,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:56:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:56:26,231 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 19:56:26,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:56:26,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883115141] [2022-11-02 19:56:26,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883115141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:56:26,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731623890] [2022-11-02 19:56:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:56:26,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:56:26,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:56:26,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:56:26,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 19:56:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:56:26,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 19:56:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:56:26,440 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 19:56:26,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:56:26,483 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 19:56:26,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731623890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:56:26,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 19:56:26,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-11-02 19:56:26,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394172628] [2022-11-02 19:56:26,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 19:56:26,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 19:56:26,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:56:26,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 19:56:26,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-02 19:56:26,504 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 19:56:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:56:26,612 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-11-02 19:56:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 19:56:26,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 9 [2022-11-02 19:56:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:56:26,613 INFO L225 Difference]: With dead ends: 26 [2022-11-02 19:56:26,613 INFO L226 Difference]: Without dead ends: 19 [2022-11-02 19:56:26,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2022-11-02 19:56:26,615 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 19:56:26,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 14 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 19:56:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-02 19:56:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-02 19:56:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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 19:56:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-02 19:56:26,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2022-11-02 19:56:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:56:26,622 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-02 19:56:26,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 19:56:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-02 19:56:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 19:56:26,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:56:26,623 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-02 19:56:26,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 19:56:26,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:56:26,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:56:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:56:26,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2022-11-02 19:56:26,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:56:26,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895193361] [2022-11-02 19:56:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:56:26,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:56:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:56:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:56:27,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:56:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895193361] [2022-11-02 19:56:27,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895193361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:56:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620797338] [2022-11-02 19:56:27,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 19:56:27,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:56:27,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:56:27,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:56:27,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 19:56:27,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 19:56:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 19:56:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 19:56:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:56:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:56:27,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:56:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:56:27,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620797338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:56:27,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 19:56:27,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 19 [2022-11-02 19:56:27,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803196560] [2022-11-02 19:56:27,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 19:56:27,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 19:56:27,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:56:27,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 19:56:27,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2022-11-02 19:56:27,864 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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 19:56:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:56:29,203 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-11-02 19:56:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 19:56:29,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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 18 [2022-11-02 19:56:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:56:29,206 INFO L225 Difference]: With dead ends: 46 [2022-11-02 19:56:29,206 INFO L226 Difference]: Without dead ends: 37 [2022-11-02 19:56:29,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2022-11-02 19:56:29,208 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 75 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 19:56:29,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 32 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 19:56:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-02 19:56:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-02 19:56:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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 19:56:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-02 19:56:29,224 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 18 [2022-11-02 19:56:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:56:29,225 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-02 19:56:29,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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 19:56:29,226 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-02 19:56:29,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 19:56:29,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:56:29,228 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-02 19:56:29,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 19:56:29,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:56:29,455 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:56:29,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:56:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -51731342, now seen corresponding path program 3 times [2022-11-02 19:56:29,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:56:29,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714916609] [2022-11-02 19:56:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:56:29,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:56:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:56:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:56:30,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:56:30,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714916609] [2022-11-02 19:56:30,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714916609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:56:30,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288558540] [2022-11-02 19:56:30,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 19:56:30,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:56:30,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:56:30,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:56:30,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 19:56:30,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 19:56:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 19:56:30,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 19:56:30,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:56:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-02 19:56:30,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:56:30,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288558540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:56:30,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 19:56:30,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2022-11-02 19:56:30,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884104955] [2022-11-02 19:56:30,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:56:30,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 19:56:30,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:56:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 19:56:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-02 19:56:30,291 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 19:56:30,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:56:30,357 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-11-02 19:56:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 19:56:30,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) Word has length 36 [2022-11-02 19:56:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:56:30,363 INFO L225 Difference]: With dead ends: 63 [2022-11-02 19:56:30,364 INFO L226 Difference]: Without dead ends: 59 [2022-11-02 19:56:30,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-02 19:56:30,366 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:56:30,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 12 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:56:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-02 19:56:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2022-11-02 19:56:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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 19:56:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-02 19:56:30,385 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 36 [2022-11-02 19:56:30,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:56:30,386 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-02 19:56:30,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 19:56:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-02 19:56:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 19:56:30,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:56:30,387 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:56:30,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 19:56:30,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:56:30,611 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:56:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:56:30,611 INFO L85 PathProgramCache]: Analyzing trace with hash -108989644, now seen corresponding path program 1 times [2022-11-02 19:56:30,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:56:30,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005750023] [2022-11-02 19:56:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:56:30,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:56:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:56:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:56:30,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:56:30,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005750023] [2022-11-02 19:56:30,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005750023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:56:30,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730973655] [2022-11-02 19:56:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:56:30,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:56:30,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:56:30,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:56:30,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 19:56:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:56:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 19:56:31,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:56:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:56:31,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:56:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:56:31,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730973655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:56:31,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 19:56:31,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 24 [2022-11-02 19:56:31,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772033520] [2022-11-02 19:56:31,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 19:56:31,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 19:56:31,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:56:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 19:56:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2022-11-02 19:56:31,651 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 19:56:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:56:37,126 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-11-02 19:56:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 19:56:37,127 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-02 19:56:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:56:37,128 INFO L225 Difference]: With dead ends: 88 [2022-11-02 19:56:37,128 INFO L226 Difference]: Without dead ends: 70 [2022-11-02 19:56:37,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=393, Invalid=663, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 19:56:37,129 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 19:56:37,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 51 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 19:56:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-02 19:56:37,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-02 19:56:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 19:56:37,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-11-02 19:56:37,146 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 36 [2022-11-02 19:56:37,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:56:37,146 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-11-02 19:56:37,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 19:56:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-11-02 19:56:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 19:56:37,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:56:37,151 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:56:37,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 19:56:37,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:56:37,377 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:56:37,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:56:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1647036101, now seen corresponding path program 2 times [2022-11-02 19:56:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:56:37,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696007306] [2022-11-02 19:56:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:56:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:56:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:56:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:56:38,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:56:38,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696007306] [2022-11-02 19:56:38,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696007306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:56:38,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182007878] [2022-11-02 19:56:38,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 19:56:38,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:56:38,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:56:38,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:56:38,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 19:56:38,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 19:56:38,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 19:56:38,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-02 19:56:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:56:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:56:38,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:56:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:56:40,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182007878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:56:40,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 19:56:40,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 46 [2022-11-02 19:56:40,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121014341] [2022-11-02 19:56:40,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 19:56:40,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 19:56:40,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:56:40,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 19:56:40,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=1475, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 19:56:40,214 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 46 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 19:59:33,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:59:33,509 INFO L93 Difference]: Finished difference Result 145 states and 169 transitions. [2022-11-02 19:59:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 19:59:33,511 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 46 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-02 19:59:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:59:33,512 INFO L225 Difference]: With dead ends: 145 [2022-11-02 19:59:33,512 INFO L226 Difference]: Without dead ends: 136 [2022-11-02 19:59:33,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 173.7s TimeCoverageRelationStatistics Valid=1511, Invalid=2775, Unknown=4, NotChecked=0, Total=4290 [2022-11-02 19:59:33,515 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 104 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 19:59:33,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 115 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 19:59:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-02 19:59:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-11-02 19:59:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 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 19:59:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-11-02 19:59:33,541 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 69 [2022-11-02 19:59:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:59:33,541 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-11-02 19:59:33,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 46 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 19:59:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-11-02 19:59:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-02 19:59:33,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:59:33,544 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:59:33,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 19:59:33,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:59:33,751 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:59:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:59:33,751 INFO L85 PathProgramCache]: Analyzing trace with hash 420755547, now seen corresponding path program 3 times [2022-11-02 19:59:33,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:59:33,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366724453] [2022-11-02 19:59:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:59:33,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:59:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:59:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 85 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:59:37,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:59:37,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366724453] [2022-11-02 19:59:37,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366724453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:59:37,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395414889] [2022-11-02 19:59:37,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 19:59:37,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:59:37,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:59:37,116 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:59:37,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 19:59:37,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 19:59:37,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 19:59:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 19:59:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:59:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2022-11-02 19:59:38,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:59:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2022-11-02 19:59:40,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395414889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:59:40,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 19:59:40,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 8] total 56 [2022-11-02 19:59:40,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221227565] [2022-11-02 19:59:40,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 19:59:40,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-02 19:59:40,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:59:40,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-02 19:59:40,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2767, Unknown=0, NotChecked=0, Total=3080 [2022-11-02 19:59:40,248 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 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 19:59:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:59:47,088 INFO L93 Difference]: Finished difference Result 164 states and 176 transitions. [2022-11-02 19:59:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-02 19:59:47,089 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 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 135 [2022-11-02 19:59:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:59:47,090 INFO L225 Difference]: With dead ends: 164 [2022-11-02 19:59:47,090 INFO L226 Difference]: Without dead ends: 155 [2022-11-02 19:59:47,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1188, Invalid=9524, Unknown=0, NotChecked=0, Total=10712 [2022-11-02 19:59:47,095 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 319 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 5702 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 5849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 5702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-02 19:59:47,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 67 Invalid, 5849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 5702 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-02 19:59:47,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-02 19:59:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-11-02 19:59:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 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 19:59:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2022-11-02 19:59:47,115 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 135 [2022-11-02 19:59:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:59:47,116 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2022-11-02 19:59:47,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 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 19:59:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2022-11-02 19:59:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-02 19:59:47,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:59:47,118 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 44, 5, 1, 1, 1, 1, 1, 1] [2022-11-02 19:59:47,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 19:59:47,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 19:59:47,322 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:59:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:59:47,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1171799301, now seen corresponding path program 4 times [2022-11-02 19:59:47,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:59:47,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457994058] [2022-11-02 19:59:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:59:47,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:59:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:59:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 625 proven. 2926 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 19:59:49,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:59:49,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457994058] [2022-11-02 19:59:49,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457994058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:59:49,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953196743] [2022-11-02 19:59:49,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 19:59:49,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:59:49,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:59:49,942 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:59:49,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa41a3-dfd5-48b4-8f87-c7b9d3e8295b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 19:59:50,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 19:59:50,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 19:59:50,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-02 19:59:50,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:59:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 502 proven. 3060 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 19:59:50,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:59:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 502 proven. 3060 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 19:59:56,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953196743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:59:56,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 19:59:56,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 49] total 96 [2022-11-02 19:59:56,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395275558] [2022-11-02 19:59:56,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 19:59:56,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-02 19:59:56,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:59:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-02 19:59:56,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2444, Invalid=6676, Unknown=0, NotChecked=0, Total=9120 [2022-11-02 19:59:56,795 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 96 states, 96 states have (on average 2.9895833333333335) internal successors, (287), 96 states have internal predecessors, (287), 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)