./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/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_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/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_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/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 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:33:57,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:33:57,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:33:57,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:33:57,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:33:57,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:33:57,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:33:57,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:33:57,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:33:57,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:33:57,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:33:57,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:33:57,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:33:57,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:33:57,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:33:57,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:33:57,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:33:57,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:33:57,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:33:57,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:33:57,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:33:57,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:33:57,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:33:57,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:33:57,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:33:57,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:33:57,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:33:57,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:33:57,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:33:57,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:33:57,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:33:57,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:33:57,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:33:57,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:33:57,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:33:57,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:33:57,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:33:57,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:33:57,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:33:57,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:33:57,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:33:57,875 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:33:57,913 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:33:57,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:33:57,914 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:33:57,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:33:57,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:33:57,919 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:33:57,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:33:57,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:33:57,920 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:33:57,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:33:57,921 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:33:57,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:33:57,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:33:57,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:33:57,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:33:57,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:33:57,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:33:57,923 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:33:57,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:33:57,923 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:33:57,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:33:57,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:33:57,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:33:57,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:33:57,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:33:57,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:33:57,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:33:57,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:33:57,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:33:57,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:33:57,927 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:33:57,927 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:33:57,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:33:57,928 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_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d [2022-11-02 20:33:58,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:33:58,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:33:58,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:33:58,291 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:33:58,292 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:33:58,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2022-11-02 20:33:58,387 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/data/9c79f9373/22b6c6ce481c4e779483d72083ba8833/FLAG4eba7e3af [2022-11-02 20:33:58,874 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:33:58,875 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2022-11-02 20:33:58,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/data/9c79f9373/22b6c6ce481c4e779483d72083ba8833/FLAG4eba7e3af [2022-11-02 20:33:59,253 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/data/9c79f9373/22b6c6ce481c4e779483d72083ba8833 [2022-11-02 20:33:59,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:33:59,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:33:59,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:33:59,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:33:59,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:33:59,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3832a1b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59, skipping insertion in model container [2022-11-02 20:33:59,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:33:59,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:33:59,532 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_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2022-11-02 20:33:59,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:33:59,587 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:33:59,605 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_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2022-11-02 20:33:59,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:33:59,665 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:33:59,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59 WrapperNode [2022-11-02 20:33:59,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:33:59,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:33:59,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:33:59,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:33:59,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,736 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-02 20:33:59,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:33:59,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:33:59,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:33:59,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:33:59,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,775 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:33:59,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:33:59,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:33:59,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:33:59,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (1/1) ... [2022-11-02 20:33:59,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:33:59,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:59,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:33:59,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:33:59,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:33:59,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:33:59,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:33:59,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:33:59,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:33:59,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:33:59,957 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:33:59,959 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:34:00,245 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:34:00,252 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:34:00,252 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:34:00,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:34:00 BoogieIcfgContainer [2022-11-02 20:34:00,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:34:00,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:34:00,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:34:00,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:34:00,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:33:59" (1/3) ... [2022-11-02 20:34:00,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5253989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:34:00, skipping insertion in model container [2022-11-02 20:34:00,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:59" (2/3) ... [2022-11-02 20:34:00,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5253989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:34:00, skipping insertion in model container [2022-11-02 20:34:00,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:34:00" (3/3) ... [2022-11-02 20:34:00,277 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound50.c [2022-11-02 20:34:00,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:34:00,314 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:34:00,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:34:00,375 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;@1874a1e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:34:00,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:34:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:34:00,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:34:00,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:00,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:00,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:00,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:00,423 INFO L85 PathProgramCache]: Analyzing trace with hash -797370321, now seen corresponding path program 1 times [2022-11-02 20:34:00,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:00,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846128601] [2022-11-02 20:34:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:00,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:00,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:00,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846128601] [2022-11-02 20:34:00,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:34:00,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218763884] [2022-11-02 20:34:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:00,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:00,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:00,620 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:00,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:34:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:00,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:34:00,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:00,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:00,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218763884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:00,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:00,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:34:00,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026370527] [2022-11-02 20:34:00,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:00,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:34:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:00,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:34:00,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:34:00,822 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:00,853 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2022-11-02 20:34:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:34:00,856 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-02 20:34:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:00,866 INFO L225 Difference]: With dead ends: 57 [2022-11-02 20:34:00,867 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 20:34:00,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:34:00,881 INFO L413 NwaCegarLoop]: 42 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, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:00,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:34:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 20:34:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-02 20:34:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:34:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2022-11-02 20:34:00,980 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 10 [2022-11-02 20:34:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:00,980 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2022-11-02 20:34:00,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:00,981 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2022-11-02 20:34:00,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:34:00,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:00,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:01,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:01,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-02 20:34:01,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:01,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1698606518, now seen corresponding path program 1 times [2022-11-02 20:34:01,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:01,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238542566] [2022-11-02 20:34:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:01,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:01,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:01,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238542566] [2022-11-02 20:34:01,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:34:01,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922666825] [2022-11-02 20:34:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:01,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:01,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:01,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:01,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:34:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:01,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:34:01,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:01,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:01,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922666825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:01,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:01,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:34:01,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652871913] [2022-11-02 20:34:01,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:01,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:34:01,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:34:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:34:01,417 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:01,445 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-11-02 20:34:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:34:01,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-02 20:34:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:01,448 INFO L225 Difference]: With dead ends: 47 [2022-11-02 20:34:01,448 INFO L226 Difference]: Without dead ends: 28 [2022-11-02 20:34:01,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:34:01,450 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:01,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:34:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-02 20:34:01,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-02 20:34:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:34:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2022-11-02 20:34:01,461 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 12 [2022-11-02 20:34:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:01,461 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2022-11-02 20:34:01,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:01,462 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2022-11-02 20:34:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:34:01,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:01,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:01,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:01,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:01,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash 776097594, now seen corresponding path program 1 times [2022-11-02 20:34:01,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:01,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766644089] [2022-11-02 20:34:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:01,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:01,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:34:01,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279256904] [2022-11-02 20:34:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:01,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:01,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:01,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:01,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:34:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:34:01,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:01,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:01,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:01,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766644089] [2022-11-02 20:34:01,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:34:01,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279256904] [2022-11-02 20:34:01,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279256904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:01,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:01,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:34:01,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213451778] [2022-11-02 20:34:01,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:01,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:34:01,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:01,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:34:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:34:01,821 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:01,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:01,853 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-11-02 20:34:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:34:01,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 20:34:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:01,855 INFO L225 Difference]: With dead ends: 41 [2022-11-02 20:34:01,856 INFO L226 Difference]: Without dead ends: 32 [2022-11-02 20:34:01,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:34:01,858 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:01,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:34:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-02 20:34:01,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-11-02 20:34:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:34:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2022-11-02 20:34:01,868 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 13 [2022-11-02 20:34:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:01,868 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2022-11-02 20:34:01,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2022-11-02 20:34:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:34:01,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:01,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:01,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:02,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:02,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash 777587144, now seen corresponding path program 1 times [2022-11-02 20:34:02,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:02,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013808256] [2022-11-02 20:34:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:02,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:02,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:02,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013808256] [2022-11-02 20:34:02,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013808256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:02,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:02,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:34:02,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620250063] [2022-11-02 20:34:02,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:02,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:34:02,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:02,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:34:02,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:34:02,691 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:05,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:07,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:09,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:11,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:14,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:16,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:16,977 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2022-11-02 20:34:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:34:16,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 20:34:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:16,979 INFO L225 Difference]: With dead ends: 64 [2022-11-02 20:34:16,979 INFO L226 Difference]: Without dead ends: 45 [2022-11-02 20:34:16,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:34:16,982 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 18 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:16,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 155 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 88 Invalid, 5 Unknown, 0 Unchecked, 14.2s Time] [2022-11-02 20:34:16,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-02 20:34:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-11-02 20:34:17,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-02 20:34:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2022-11-02 20:34:17,012 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2022-11-02 20:34:17,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:17,013 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2022-11-02 20:34:17,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:17,019 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2022-11-02 20:34:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:34:17,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:17,020 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:17,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:34:17,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash 84493759, now seen corresponding path program 1 times [2022-11-02 20:34:17,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:17,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948284967] [2022-11-02 20:34:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:17,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:17,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:34:17,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172431073] [2022-11-02 20:34:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:17,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:17,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:17,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:17,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:34:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:17,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:34:17,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:17,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:17,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:17,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948284967] [2022-11-02 20:34:17,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:34:17,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172431073] [2022-11-02 20:34:17,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172431073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:17,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:34:17,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-02 20:34:17,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188049800] [2022-11-02 20:34:17,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:17,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:34:17,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:34:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:34:17,273 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:19,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:34:21,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:34:23,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:34:27,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:27,250 INFO L93 Difference]: Finished difference Result 98 states and 142 transitions. [2022-11-02 20:34:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:34:27,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-02 20:34:27,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:27,252 INFO L225 Difference]: With dead ends: 98 [2022-11-02 20:34:27,252 INFO L226 Difference]: Without dead ends: 79 [2022-11-02 20:34:27,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:34:27,253 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 64 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:27,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 235 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 3 Unknown, 0 Unchecked, 9.9s Time] [2022-11-02 20:34:27,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-02 20:34:27,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2022-11-02 20:34:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-02 20:34:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-11-02 20:34:27,273 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 15 [2022-11-02 20:34:27,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:27,274 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-11-02 20:34:27,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-11-02 20:34:27,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:34:27,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:27,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:27,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:27,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:27,490 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:27,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2016757679, now seen corresponding path program 1 times [2022-11-02 20:34:27,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:27,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802622256] [2022-11-02 20:34:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:27,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:27,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:34:27,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546189571] [2022-11-02 20:34:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:27,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:27,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:27,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:27,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:34:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:27,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:34:27,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:27,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:27,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:27,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802622256] [2022-11-02 20:34:27,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:34:27,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546189571] [2022-11-02 20:34:27,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546189571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:27,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:34:27,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-02 20:34:27,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419311590] [2022-11-02 20:34:27,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:27,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:34:27,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:34:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:34:27,711 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:29,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:33,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:36,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:34:38,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:34:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:42,995 INFO L93 Difference]: Finished difference Result 132 states and 188 transitions. [2022-11-02 20:34:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:34:42,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:34:42,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:42,997 INFO L225 Difference]: With dead ends: 132 [2022-11-02 20:34:42,997 INFO L226 Difference]: Without dead ends: 123 [2022-11-02 20:34:42,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:34:42,999 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 131 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:42,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 320 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 128 Invalid, 1 Unknown, 0 Unchecked, 15.2s Time] [2022-11-02 20:34:43,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-02 20:34:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2022-11-02 20:34:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 67 states have internal predecessors, (84), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-02 20:34:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 169 transitions. [2022-11-02 20:34:43,028 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 169 transitions. Word has length 16 [2022-11-02 20:34:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:43,028 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 169 transitions. [2022-11-02 20:34:43,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 169 transitions. [2022-11-02 20:34:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:34:43,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:43,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:43,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-02 20:34:43,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:34:43,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2015268129, now seen corresponding path program 1 times [2022-11-02 20:34:43,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:43,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523199195] [2022-11-02 20:34:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:34:43,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:43,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523199195] [2022-11-02 20:34:43,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523199195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:43,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:43,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:34:43,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362878418] [2022-11-02 20:34:43,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:43,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:34:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:34:43,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:34:43,561 INFO L87 Difference]: Start difference. First operand 114 states and 169 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:47,346 INFO L93 Difference]: Finished difference Result 211 states and 324 transitions. [2022-11-02 20:34:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:34:47,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:34:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:47,349 INFO L225 Difference]: With dead ends: 211 [2022-11-02 20:34:47,349 INFO L226 Difference]: Without dead ends: 209 [2022-11-02 20:34:47,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:34:47,354 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 18 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:47,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 156 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-02 20:34:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-02 20:34:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 141. [2022-11-02 20:34:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 90 states have internal predecessors, (105), 48 states have call successors, (48), 10 states have call predecessors, (48), 10 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-02 20:34:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 196 transitions. [2022-11-02 20:34:47,412 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 196 transitions. Word has length 16 [2022-11-02 20:34:47,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:47,413 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 196 transitions. [2022-11-02 20:34:47,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 196 transitions. [2022-11-02 20:34:47,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:34:47,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:47,414 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:47,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:34:47,415 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:47,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:47,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1484248551, now seen corresponding path program 1 times [2022-11-02 20:34:47,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:47,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608712405] [2022-11-02 20:34:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:47,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:47,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:34:47,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465502055] [2022-11-02 20:34:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:47,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:47,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:47,426 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:47,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:34:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:47,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:34:47,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:47,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:47,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:47,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608712405] [2022-11-02 20:34:47,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:34:47,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465502055] [2022-11-02 20:34:47,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465502055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:47,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:47,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:34:47,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616696881] [2022-11-02 20:34:47,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:47,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:34:47,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:47,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:34:47,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:34:47,586 INFO L87 Difference]: Start difference. First operand 141 states and 196 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:34:49,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:34:52,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:34:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:53,072 INFO L93 Difference]: Finished difference Result 204 states and 289 transitions. [2022-11-02 20:34:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:34:53,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-02 20:34:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:53,077 INFO L225 Difference]: With dead ends: 204 [2022-11-02 20:34:53,077 INFO L226 Difference]: Without dead ends: 192 [2022-11-02 20:34:53,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:34:53,079 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:53,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 109 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2022-11-02 20:34:53,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-02 20:34:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-11-02 20:34:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 111 states have (on average 1.2702702702702702) internal successors, (141), 122 states have internal predecessors, (141), 65 states have call successors, (65), 15 states have call predecessors, (65), 15 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2022-11-02 20:34:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 263 transitions. [2022-11-02 20:34:53,140 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 263 transitions. Word has length 18 [2022-11-02 20:34:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:53,140 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 263 transitions. [2022-11-02 20:34:53,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:34:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 263 transitions. [2022-11-02 20:34:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:34:53,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:53,142 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:53,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:53,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:53,358 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:53,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1188910040, now seen corresponding path program 1 times [2022-11-02 20:34:53,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:53,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60528748] [2022-11-02 20:34:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:53,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:53,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:34:53,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297792589] [2022-11-02 20:34:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:53,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:53,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:53,373 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:53,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:34:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:34:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:34:53,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:53,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:53,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60528748] [2022-11-02 20:34:53,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:34:53,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297792589] [2022-11-02 20:34:53,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297792589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:53,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:53,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:34:53,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989530751] [2022-11-02 20:34:53,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:53,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:34:53,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:53,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:34:53,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:34:53,584 INFO L87 Difference]: Start difference. First operand 192 states and 263 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:34:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:54,891 INFO L93 Difference]: Finished difference Result 198 states and 267 transitions. [2022-11-02 20:34:54,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:34:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-02 20:34:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:54,894 INFO L225 Difference]: With dead ends: 198 [2022-11-02 20:34:54,894 INFO L226 Difference]: Without dead ends: 170 [2022-11-02 20:34:54,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:34:54,896 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:54,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 122 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:34:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-02 20:34:54,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-11-02 20:34:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 109 states have internal predecessors, (127), 58 states have call successors, (58), 12 states have call predecessors, (58), 12 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2022-11-02 20:34:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 236 transitions. [2022-11-02 20:34:54,941 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 236 transitions. Word has length 23 [2022-11-02 20:34:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:54,942 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 236 transitions. [2022-11-02 20:34:54,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:34:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 236 transitions. [2022-11-02 20:34:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:34:54,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:54,944 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:54,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-02 20:34:55,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:55,159 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash -158866305, now seen corresponding path program 1 times [2022-11-02 20:34:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:55,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130486410] [2022-11-02 20:34:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:55,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:55,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:34:55,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225545916] [2022-11-02 20:34:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:55,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:55,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:55,171 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:55,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:34:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:55,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:34:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:34:55,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:55,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130486410] [2022-11-02 20:34:55,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:34:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225545916] [2022-11-02 20:34:55,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225545916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:55,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:55,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:34:55,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746790797] [2022-11-02 20:34:55,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:55,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:34:55,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:34:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:34:55,440 INFO L87 Difference]: Start difference. First operand 170 states and 236 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:34:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:57,020 INFO L93 Difference]: Finished difference Result 226 states and 307 transitions. [2022-11-02 20:34:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:34:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-02 20:34:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:57,023 INFO L225 Difference]: With dead ends: 226 [2022-11-02 20:34:57,023 INFO L226 Difference]: Without dead ends: 212 [2022-11-02 20:34:57,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:34:57,025 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:57,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 124 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-02 20:34:57,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-02 20:34:57,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 205. [2022-11-02 20:34:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 121 states have internal predecessors, (137), 73 states have call successors, (73), 17 states have call predecessors, (73), 17 states have return successors, (67), 66 states have call predecessors, (67), 67 states have call successors, (67) [2022-11-02 20:34:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 277 transitions. [2022-11-02 20:34:57,084 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 277 transitions. Word has length 26 [2022-11-02 20:34:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:57,085 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 277 transitions. [2022-11-02 20:34:57,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:34:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 277 transitions. [2022-11-02 20:34:57,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:34:57,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:57,092 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:57,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:57,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:34:57,299 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:57,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2097639676, now seen corresponding path program 1 times [2022-11-02 20:34:57,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:57,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701920739] [2022-11-02 20:34:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:57,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:57,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:57,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701920739] [2022-11-02 20:34:57,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701920739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:57,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714342681] [2022-11-02 20:34:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:57,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:57,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:57,531 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:57,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:34:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:34:57,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:57,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:57,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714342681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:57,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:57,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-11-02 20:34:57,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631522127] [2022-11-02 20:34:57,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:57,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:34:57,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:34:57,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:34:57,846 INFO L87 Difference]: Start difference. First operand 205 states and 277 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:01,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:06,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:35:08,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:13,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:15,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:35:20,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:35:24,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:35:29,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:30,275 INFO L93 Difference]: Finished difference Result 454 states and 601 transitions. [2022-11-02 20:35:30,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:35:30,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-02 20:35:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:30,279 INFO L225 Difference]: With dead ends: 454 [2022-11-02 20:35:30,279 INFO L226 Difference]: Without dead ends: 403 [2022-11-02 20:35:30,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:35:30,281 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 211 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 71 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:30,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 415 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 201 Invalid, 6 Unknown, 0 Unchecked, 32.2s Time] [2022-11-02 20:35:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-02 20:35:30,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 387. [2022-11-02 20:35:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 217 states have (on average 1.1935483870967742) internal successors, (259), 234 states have internal predecessors, (259), 131 states have call successors, (131), 38 states have call predecessors, (131), 38 states have return successors, (121), 114 states have call predecessors, (121), 121 states have call successors, (121) [2022-11-02 20:35:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 511 transitions. [2022-11-02 20:35:30,336 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 511 transitions. Word has length 24 [2022-11-02 20:35:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:30,336 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 511 transitions. [2022-11-02 20:35:30,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 511 transitions. [2022-11-02 20:35:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:35:30,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:30,339 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:30,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:35:30,555 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:30,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1271100124, now seen corresponding path program 2 times [2022-11-02 20:35:30,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:30,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308211475] [2022-11-02 20:35:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:30,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:31,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:31,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308211475] [2022-11-02 20:35:31,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308211475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:35:31,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951698227] [2022-11-02 20:35:31,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:35:31,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:31,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:31,027 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:31,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:35:31,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:35:31,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:35:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:35:31,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-02 20:35:31,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:35:31,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951698227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:31,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:35:31,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 18 [2022-11-02 20:35:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491035318] [2022-11-02 20:35:31,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:31,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:35:31,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:35:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:35:31,168 INFO L87 Difference]: Start difference. First operand 387 states and 511 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:31,257 INFO L93 Difference]: Finished difference Result 435 states and 580 transitions. [2022-11-02 20:35:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:35:31,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-02 20:35:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:31,262 INFO L225 Difference]: With dead ends: 435 [2022-11-02 20:35:31,262 INFO L226 Difference]: Without dead ends: 384 [2022-11-02 20:35:31,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:35:31,264 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 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 20:35:31,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:35:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-02 20:35:31,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 379. [2022-11-02 20:35:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 210 states have (on average 1.1904761904761905) internal successors, (250), 226 states have internal predecessors, (250), 130 states have call successors, (130), 38 states have call predecessors, (130), 38 states have return successors, (120), 114 states have call predecessors, (120), 120 states have call successors, (120) [2022-11-02 20:35:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 500 transitions. [2022-11-02 20:35:31,322 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 500 transitions. Word has length 42 [2022-11-02 20:35:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:31,324 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 500 transitions. [2022-11-02 20:35:31,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 500 transitions. [2022-11-02 20:35:31,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-02 20:35:31,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:31,330 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:31,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:31,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:35:31,546 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:31,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2047122003, now seen corresponding path program 1 times [2022-11-02 20:35:31,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:31,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464226028] [2022-11-02 20:35:31,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:31,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:31,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:35:31,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628434908] [2022-11-02 20:35:31,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:31,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:31,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:31,563 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:31,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9905cdb5-ff86-4c2d-8f3f-79cfcfd87960/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process