./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.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_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/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_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/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_21e5065d-bc6d-451b-bf82-08fbcc13b1da/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 ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 --- 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 20:19:52,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:19:52,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:19:52,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:19:52,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:19:52,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:19:52,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:19:52,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:19:52,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:19:52,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:19:52,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:19:52,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:19:52,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:19:52,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:19:52,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:19:52,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:19:52,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:19:52,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:19:52,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:19:52,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:19:52,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:19:52,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:19:52,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:19:52,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:19:52,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:19:52,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:19:52,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:19:52,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:19:52,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:19:52,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:19:52,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:19:52,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:19:52,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:19:52,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:19:52,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:19:52,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:19:52,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:19:52,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:19:52,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:19:52,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:19:52,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:19:52,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:19:52,236 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:19:52,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:19:52,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:19:52,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:19:52,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:19:52,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:19:52,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:19:52,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:19:52,240 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:19:52,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:19:52,242 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:19:52,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:19:52,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:19:52,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:19:52,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:19:52,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:19:52,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:19:52,244 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:19:52,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:19:52,244 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:19:52,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:19:52,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:19:52,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:19:52,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:19:52,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:19:52,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:19:52,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:19:52,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:19:52,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:19:52,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:19:52,253 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:19:52,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:19:52,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:19:52,254 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_21e5065d-bc6d-451b-bf82-08fbcc13b1da/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 [2022-11-02 20:19:52,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:19:52,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:19:52,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:19:52,589 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:19:52,589 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:19:52,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-11-02 20:19:52,669 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/data/2428bbff1/f0cc3c9b22a04fbba95c0eae62db997a/FLAG8c08813b4 [2022-11-02 20:19:53,187 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:19:53,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-11-02 20:19:53,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/data/2428bbff1/f0cc3c9b22a04fbba95c0eae62db997a/FLAG8c08813b4 [2022-11-02 20:19:53,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/data/2428bbff1/f0cc3c9b22a04fbba95c0eae62db997a [2022-11-02 20:19:53,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:19:53,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:19:53,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:19:53,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:19:53,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:19:53,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:53,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb810d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53, skipping insertion in model container [2022-11-02 20:19:53,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:53,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:19:53,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:19:53,821 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_21e5065d-bc6d-451b-bf82-08fbcc13b1da/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2022-11-02 20:19:53,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:19:53,876 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:19:53,893 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_21e5065d-bc6d-451b-bf82-08fbcc13b1da/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2022-11-02 20:19:53,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:19:53,932 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:19:53,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53 WrapperNode [2022-11-02 20:19:53,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:19:53,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:19:53,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:19:53,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:19:53,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:53,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:53,986 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-02 20:19:53,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:19:53,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:19:53,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:19:53,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:19:53,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:53,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:54,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:54,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:54,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:54,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:54,018 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:54,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:54,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:19:54,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:19:54,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:19:54,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:19:54,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (1/1) ... [2022-11-02 20:19:54,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:19:54,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:19:54,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:19:54,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:19:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:19:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:19:54,100 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:19:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:19:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:19:54,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:19:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:19:54,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:19:54,185 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:19:54,189 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:19:54,420 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:19:54,440 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:19:54,441 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:19:54,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:19:54 BoogieIcfgContainer [2022-11-02 20:19:54,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:19:54,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:19:54,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:19:54,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:19:54,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:19:53" (1/3) ... [2022-11-02 20:19:54,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e14f9e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:19:54, skipping insertion in model container [2022-11-02 20:19:54,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:53" (2/3) ... [2022-11-02 20:19:54,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e14f9e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:19:54, skipping insertion in model container [2022-11-02 20:19:54,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:19:54" (3/3) ... [2022-11-02 20:19:54,453 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2022-11-02 20:19:54,502 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:19:54,502 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:19:54,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:19:54,595 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;@42d3c211, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:19:54,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:19:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-02 20:19:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:19:54,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:19:54,636 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:19:54,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:19:54,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:19:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2022-11-02 20:19:54,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:19:54,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806399402] [2022-11-02 20:19:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:54,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:19:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:19:54,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:19:54,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806399402] [2022-11-02 20:19:54,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:19:54,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047889746] [2022-11-02 20:19:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:54,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:19:54,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:19:54,893 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:19:54,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:19:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:19:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:19:55,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:19:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-02 20:19:55,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:19:55,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047889746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:19:55,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:19:55,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:19:55,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33225860] [2022-11-02 20:19:55,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:19:55,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:19:55,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:19:55,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:19:55,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:19:55,114 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:19:55,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:19:55,147 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2022-11-02 20:19:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:19:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-11-02 20:19:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:19:55,157 INFO L225 Difference]: With dead ends: 67 [2022-11-02 20:19:55,157 INFO L226 Difference]: Without dead ends: 31 [2022-11-02 20:19:55,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 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 20:19:55,164 INFO L413 NwaCegarLoop]: 46 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, 46 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 20:19:55,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:19:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-02 20:19:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-02 20:19:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 20:19:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-11-02 20:19:55,207 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-11-02 20:19:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:19:55,207 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-11-02 20:19:55,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:19:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-11-02 20:19:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:19:55,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:19:55,210 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:19:55,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:19:55,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-02 20:19:55,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:19:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:19:55,425 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2022-11-02 20:19:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:19:55,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557364717] [2022-11-02 20:19:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:55,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:19:55,455 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:19:55,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916305821] [2022-11-02 20:19:55,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:55,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:19:55,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:19:55,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:19:55,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:19:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:19:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:19:55,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:19:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:19:55,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:19:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:19:55,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:19:55,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557364717] [2022-11-02 20:19:55,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:19:55,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916305821] [2022-11-02 20:19:55,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916305821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:19:55,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:19:55,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-02 20:19:55,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497002423] [2022-11-02 20:19:55,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:19:55,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:19:55,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:19:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:19:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:19:55,741 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:19:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:19:55,860 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-11-02 20:19:55,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:19:55,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-11-02 20:19:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:19:55,862 INFO L225 Difference]: With dead ends: 48 [2022-11-02 20:19:55,862 INFO L226 Difference]: Without dead ends: 40 [2022-11-02 20:19:55,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:19:55,864 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:19:55,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:19:55,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-02 20:19:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-02 20:19:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 20:19:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-11-02 20:19:55,874 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2022-11-02 20:19:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:19:55,875 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-11-02 20:19:55,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:19:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-11-02 20:19:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:19:55,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:19:55,877 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:19:55,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:19:56,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:19:56,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:19:56,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:19:56,095 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2022-11-02 20:19:56,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:19:56,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028008630] [2022-11-02 20:19:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:56,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:19:56,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:19:56,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066545942] [2022-11-02 20:19:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:56,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:19:56,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:19:56,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:19:56,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:19:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:19:56,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:19:56,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:19:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:19:56,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:19:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:19:56,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:19:56,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028008630] [2022-11-02 20:19:56,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:19:56,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066545942] [2022-11-02 20:19:56,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066545942] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:19:56,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:19:56,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-11-02 20:19:56,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627229754] [2022-11-02 20:19:56,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:19:56,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:19:56,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:19:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:19:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:19:56,428 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:19:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:19:56,494 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-11-02 20:19:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:19:56,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-11-02 20:19:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:19:56,496 INFO L225 Difference]: With dead ends: 39 [2022-11-02 20:19:56,496 INFO L226 Difference]: Without dead ends: 37 [2022-11-02 20:19:56,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:19:56,497 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:19:56,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:19:56,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-02 20:19:56,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-02 20:19:56,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 20:19:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-11-02 20:19:56,508 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2022-11-02 20:19:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:19:56,508 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-11-02 20:19:56,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:19:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-11-02 20:19:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:19:56,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:19:56,510 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:19:56,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:19:56,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:19:56,725 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:19:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:19:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2022-11-02 20:19:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:19:56,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488318568] [2022-11-02 20:19:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:19:56,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:19:56,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582644890] [2022-11-02 20:19:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:56,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:19:56,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:19:56,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:19:56,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:19:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:19:56,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:19:56,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:19:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:19:56,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:19:56,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:19:56,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488318568] [2022-11-02 20:19:56,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:19:56,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582644890] [2022-11-02 20:19:56,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582644890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:19:56,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:19:56,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:19:56,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922264078] [2022-11-02 20:19:56,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:19:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:19:56,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:19:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:19:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:19:56,917 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:19:57,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:19:57,001 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-11-02 20:19:57,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:19:57,011 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-11-02 20:19:57,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:19:57,012 INFO L225 Difference]: With dead ends: 50 [2022-11-02 20:19:57,012 INFO L226 Difference]: Without dead ends: 48 [2022-11-02 20:19:57,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 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 20:19:57,014 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:19:57,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 145 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:19:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-02 20:19:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-02 20:19:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-02 20:19:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-11-02 20:19:57,028 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2022-11-02 20:19:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:19:57,029 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-11-02 20:19:57,029 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:19:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-11-02 20:19:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:19:57,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:19:57,031 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:19:57,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:19:57,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:19:57,256 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:19:57,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:19:57,257 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2022-11-02 20:19:57,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:19:57,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29448166] [2022-11-02 20:19:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:57,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:19:57,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:19:57,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465205549] [2022-11-02 20:19:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:57,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:19:57,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:19:57,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:19:57,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:19:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:19:57,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:19:57,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:19:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-02 20:19:57,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:19:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-02 20:19:57,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:19:57,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29448166] [2022-11-02 20:19:57,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:19:57,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465205549] [2022-11-02 20:19:57,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465205549] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:19:57,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:19:57,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-11-02 20:19:57,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809559291] [2022-11-02 20:19:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:19:57,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:19:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:19:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:19:57,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:19:57,727 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:19:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:19:57,808 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-11-02 20:19:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:19:57,809 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-11-02 20:19:57,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:19:57,810 INFO L225 Difference]: With dead ends: 54 [2022-11-02 20:19:57,810 INFO L226 Difference]: Without dead ends: 52 [2022-11-02 20:19:57,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:19:57,811 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:19:57,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:19:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-02 20:19:57,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-02 20:19:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-02 20:19:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-11-02 20:19:57,825 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2022-11-02 20:19:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:19:57,826 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-11-02 20:19:57,826 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:19:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-11-02 20:19:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:19:57,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:19:57,828 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:19:57,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:19:58,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:19:58,053 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:19:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:19:58,053 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2022-11-02 20:19:58,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:19:58,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407618109] [2022-11-02 20:19:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:58,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:19:58,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:19:58,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135030015] [2022-11-02 20:19:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:58,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:19:58,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:19:58,078 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:19:58,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:19:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:19:58,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:19:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:19:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 20:19:58,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:19:58,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:19:58,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407618109] [2022-11-02 20:19:58,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:19:58,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135030015] [2022-11-02 20:19:58,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135030015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:19:58,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:19:58,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-02 20:19:58,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433170916] [2022-11-02 20:19:58,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:19:58,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:19:58,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:19:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:19:58,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:19:58,694 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-02 20:19:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:19:58,977 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-11-02 20:19:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:19:58,978 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2022-11-02 20:19:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:19:58,979 INFO L225 Difference]: With dead ends: 60 [2022-11-02 20:19:58,979 INFO L226 Difference]: Without dead ends: 58 [2022-11-02 20:19:58,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:19:58,980 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:19:58,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 110 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:19:58,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-02 20:19:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-11-02 20:19:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-02 20:19:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-11-02 20:19:58,995 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2022-11-02 20:19:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:19:58,996 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-11-02 20:19:58,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-02 20:19:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-11-02 20:19:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 20:19:58,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:19:58,997 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:19:59,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:19:59,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:19:59,213 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:19:59,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:19:59,213 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2022-11-02 20:19:59,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:19:59,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319763807] [2022-11-02 20:19:59,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:59,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:19:59,228 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:19:59,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675856029] [2022-11-02 20:19:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:59,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:19:59,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:19:59,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:19:59,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:19:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:19:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:19:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:19:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-02 20:19:59,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:19:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-02 20:19:59,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:19:59,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319763807] [2022-11-02 20:19:59,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:19:59,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675856029] [2022-11-02 20:19:59,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675856029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:19:59,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:19:59,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-02 20:19:59,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404451121] [2022-11-02 20:19:59,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:19:59,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:19:59,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:19:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:19:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:19:59,497 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-02 20:19:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:19:59,794 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2022-11-02 20:19:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:19:59,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2022-11-02 20:19:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:19:59,799 INFO L225 Difference]: With dead ends: 102 [2022-11-02 20:19:59,799 INFO L226 Difference]: Without dead ends: 94 [2022-11-02 20:19:59,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:19:59,802 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 30 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:19:59,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 231 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:19:59,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-02 20:19:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-11-02 20:19:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-02 20:19:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2022-11-02 20:19:59,852 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2022-11-02 20:19:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:19:59,855 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2022-11-02 20:19:59,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-02 20:19:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2022-11-02 20:19:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:19:59,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:19:59,861 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:19:59,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:00,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:20:00,062 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:20:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:00,062 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2022-11-02 20:20:00,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:00,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592062926] [2022-11-02 20:20:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:00,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:00,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:20:00,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173730110] [2022-11-02 20:20:00,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:00,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:00,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:00,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:00,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:20:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:20:00,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-02 20:20:00,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-02 20:20:00,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:00,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592062926] [2022-11-02 20:20:00,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:20:00,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173730110] [2022-11-02 20:20:00,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173730110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:00,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:20:00,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-11-02 20:20:00,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34665934] [2022-11-02 20:20:00,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:00,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:20:00,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:00,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:20:00,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:20:00,508 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-02 20:20:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:00,980 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2022-11-02 20:20:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:20:00,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 71 [2022-11-02 20:20:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:00,984 INFO L225 Difference]: With dead ends: 128 [2022-11-02 20:20:00,984 INFO L226 Difference]: Without dead ends: 124 [2022-11-02 20:20:00,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:20:00,986 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:00,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 166 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:20:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-02 20:20:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2022-11-02 20:20:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-02 20:20:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2022-11-02 20:20:01,022 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2022-11-02 20:20:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:01,023 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2022-11-02 20:20:01,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-02 20:20:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2022-11-02 20:20:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-02 20:20:01,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:01,025 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:01,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:01,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:01,245 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:20:01,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:01,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2022-11-02 20:20:01,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:01,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854567768] [2022-11-02 20:20:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:01,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:01,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:20:01,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082010491] [2022-11-02 20:20:01,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:20:01,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:01,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:01,260 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:01,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:20:01,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:20:01,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:01,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:20:01,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-02 20:20:01,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-02 20:20:02,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:02,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854567768] [2022-11-02 20:20:02,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:20:02,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082010491] [2022-11-02 20:20:02,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082010491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:02,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:20:02,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-11-02 20:20:02,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030469567] [2022-11-02 20:20:02,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:02,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:20:02,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:02,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:20:02,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:20:02,019 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-11-02 20:20:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:04,864 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2022-11-02 20:20:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:20:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 76 [2022-11-02 20:20:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:04,866 INFO L225 Difference]: With dead ends: 124 [2022-11-02 20:20:04,866 INFO L226 Difference]: Without dead ends: 122 [2022-11-02 20:20:04,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:20:04,868 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:04,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 171 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-02 20:20:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-02 20:20:04,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 104. [2022-11-02 20:20:04,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 59 states have (on average 1.152542372881356) internal successors, (68), 61 states have internal predecessors, (68), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-02 20:20:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 135 transitions. [2022-11-02 20:20:04,908 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 135 transitions. Word has length 76 [2022-11-02 20:20:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:04,909 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 135 transitions. [2022-11-02 20:20:04,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-11-02 20:20:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 135 transitions. [2022-11-02 20:20:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 20:20:04,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:04,911 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:04,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:05,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:20:05,124 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:20:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:05,125 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2022-11-02 20:20:05,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:05,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750294617] [2022-11-02 20:20:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:05,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:05,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:20:05,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035334264] [2022-11-02 20:20:05,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:20:05,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:05,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:05,146 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:05,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:20:05,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:20:05,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:05,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 20:20:05,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-02 20:20:05,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:05,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:05,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750294617] [2022-11-02 20:20:05,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:20:05,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035334264] [2022-11-02 20:20:05,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035334264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:05,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:20:05,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-02 20:20:05,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568228984] [2022-11-02 20:20:05,805 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:05,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:20:05,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:20:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:20:05,806 INFO L87 Difference]: Start difference. First operand 104 states and 135 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:20:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:06,293 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2022-11-02 20:20:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:20:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2022-11-02 20:20:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:06,295 INFO L225 Difference]: With dead ends: 136 [2022-11-02 20:20:06,296 INFO L226 Difference]: Without dead ends: 134 [2022-11-02 20:20:06,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:20:06,297 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:06,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 187 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:20:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-02 20:20:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2022-11-02 20:20:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 13 states have call predecessors, (42), 13 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-02 20:20:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 169 transitions. [2022-11-02 20:20:06,369 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 169 transitions. Word has length 81 [2022-11-02 20:20:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:06,370 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 169 transitions. [2022-11-02 20:20:06,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:20:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 169 transitions. [2022-11-02 20:20:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-02 20:20:06,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:06,372 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:06,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:06,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:06,596 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:20:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2022-11-02 20:20:06,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:06,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766125074] [2022-11-02 20:20:06,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:06,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:06,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:20:06,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044026801] [2022-11-02 20:20:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:06,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:06,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:06,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:06,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:20:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:06,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:20:06,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-02 20:20:07,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-02 20:20:07,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:07,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766125074] [2022-11-02 20:20:07,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:20:07,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044026801] [2022-11-02 20:20:07,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044026801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:07,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:20:07,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-11-02 20:20:07,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466192395] [2022-11-02 20:20:07,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:07,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:20:07,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:07,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:20:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:20:07,400 INFO L87 Difference]: Start difference. First operand 131 states and 169 transitions. Second operand has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-02 20:20:10,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:10,158 INFO L93 Difference]: Finished difference Result 220 states and 304 transitions. [2022-11-02 20:20:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:20:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 87 [2022-11-02 20:20:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:10,160 INFO L225 Difference]: With dead ends: 220 [2022-11-02 20:20:10,160 INFO L226 Difference]: Without dead ends: 212 [2022-11-02 20:20:10,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:20:10,162 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 53 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:10,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 299 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-02 20:20:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-02 20:20:10,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 208. [2022-11-02 20:20:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 112 states have (on average 1.1875) internal successors, (133), 113 states have internal predecessors, (133), 79 states have call successors, (79), 16 states have call predecessors, (79), 16 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-02 20:20:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 290 transitions. [2022-11-02 20:20:10,263 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 290 transitions. Word has length 87 [2022-11-02 20:20:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:10,263 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 290 transitions. [2022-11-02 20:20:10,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-02 20:20:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 290 transitions. [2022-11-02 20:20:10,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-02 20:20:10,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:10,265 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:20:10,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:10,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:10,468 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:20:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2022-11-02 20:20:10,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:10,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174794102] [2022-11-02 20:20:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:10,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:10,481 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:20:10,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739243904] [2022-11-02 20:20:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:10,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:10,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:10,490 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:10,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:20:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:10,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:20:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 59 proven. 35 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-02 20:20:11,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 59 proven. 35 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-02 20:20:16,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:16,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174794102] [2022-11-02 20:20:16,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:20:16,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739243904] [2022-11-02 20:20:16,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739243904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:16,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:20:16,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-11-02 20:20:16,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495834495] [2022-11-02 20:20:16,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:16,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:20:16,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:20:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:20:16,158 INFO L87 Difference]: Start difference. First operand 208 states and 290 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-11-02 20:20:25,155 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 20:20:30,900 WARN L234 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:20:38,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:20:45,433 WARN L539 Checker$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 20:20:47,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:20:49,449 WARN L539 Checker$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 20:20:51,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:20:53,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:20:55,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:21:00,178 WARN L539 Checker$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 20:21:02,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:21:06,714 WARN L539 Checker$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 20:21:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:06,859 INFO L93 Difference]: Finished difference Result 271 states and 379 transitions. [2022-11-02 20:21:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:21:06,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) Word has length 103 [2022-11-02 20:21:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:06,863 INFO L225 Difference]: With dead ends: 271 [2022-11-02 20:21:06,863 INFO L226 Difference]: Without dead ends: 269 [2022-11-02 20:21:06,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:21:06,865 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 76 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 145 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:06,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 229 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 669 Invalid, 9 Unknown, 0 Unchecked, 29.2s Time] [2022-11-02 20:21:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-02 20:21:07,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 258. [2022-11-02 20:21:07,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 144 states have internal predecessors, (168), 99 states have call successors, (99), 17 states have call predecessors, (99), 17 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-02 20:21:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 365 transitions. [2022-11-02 20:21:07,038 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 365 transitions. Word has length 103 [2022-11-02 20:21:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:07,039 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 365 transitions. [2022-11-02 20:21:07,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-11-02 20:21:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 365 transitions. [2022-11-02 20:21:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-02 20:21:07,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:07,041 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:07,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:07,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:21:07,249 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:21:07,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:07,249 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2022-11-02 20:21:07,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:07,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229010010] [2022-11-02 20:21:07,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:07,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:07,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:21:07,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301729867] [2022-11-02 20:21:07,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:21:07,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:07,264 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:07,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:21:07,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:21:07,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:07,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:21:07,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-02 20:21:07,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:21:07,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:07,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229010010] [2022-11-02 20:21:07,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:21:07,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301729867] [2022-11-02 20:21:07,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301729867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:21:07,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:21:07,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:21:07,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39105155] [2022-11-02 20:21:07,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:21:07,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:21:07,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:21:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:21:07,376 INFO L87 Difference]: Start difference. First operand 258 states and 365 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-02 20:21:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:07,622 INFO L93 Difference]: Finished difference Result 344 states and 483 transitions. [2022-11-02 20:21:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:21:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2022-11-02 20:21:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:07,624 INFO L225 Difference]: With dead ends: 344 [2022-11-02 20:21:07,624 INFO L226 Difference]: Without dead ends: 228 [2022-11-02 20:21:07,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:21:07,626 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:07,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 145 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:21:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-02 20:21:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 214. [2022-11-02 20:21:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 119 states have internal predecessors, (134), 79 states have call successors, (79), 17 states have call predecessors, (79), 17 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-02 20:21:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 291 transitions. [2022-11-02 20:21:07,781 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 291 transitions. Word has length 106 [2022-11-02 20:21:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:07,782 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 291 transitions. [2022-11-02 20:21:07,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-02 20:21:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 291 transitions. [2022-11-02 20:21:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-02 20:21:07,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:07,784 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:07,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:08,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:21:08,000 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:21:08,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:08,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2022-11-02 20:21:08,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:08,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222101457] [2022-11-02 20:21:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:08,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:08,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:21:08,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383497055] [2022-11-02 20:21:08,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:21:08,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:08,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:08,019 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:08,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:21:08,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:21:08,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:08,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-02 20:21:08,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 168 proven. 87 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-11-02 20:21:14,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 189 proven. 4 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-02 20:21:18,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:18,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222101457] [2022-11-02 20:21:18,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:21:18,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383497055] [2022-11-02 20:21:18,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383497055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:18,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:21:18,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 31 [2022-11-02 20:21:18,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621037084] [2022-11-02 20:21:18,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:18,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:21:18,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:18,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:21:18,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:21:18,603 INFO L87 Difference]: Start difference. First operand 214 states and 291 transitions. Second operand has 31 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 14 states have call predecessors, (34), 13 states have call successors, (34) [2022-11-02 20:21:26,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:21:47,055 WARN L234 SmtUtils]: Spent 8.84s on a formula simplification. DAG size of input: 66 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:22:03,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:03,087 INFO L93 Difference]: Finished difference Result 270 states and 364 transitions. [2022-11-02 20:22:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:22:03,089 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 14 states have call predecessors, (34), 13 states have call successors, (34) Word has length 134 [2022-11-02 20:22:03,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:03,091 INFO L225 Difference]: With dead ends: 270 [2022-11-02 20:22:03,091 INFO L226 Difference]: Without dead ends: 262 [2022-11-02 20:22:03,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 234 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=456, Invalid=1994, Unknown=0, NotChecked=0, Total=2450 [2022-11-02 20:22:03,093 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 98 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:03,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 241 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 19.9s Time] [2022-11-02 20:22:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-02 20:22:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 207. [2022-11-02 20:22:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 117 states have internal predecessors, (127), 70 states have call successors, (70), 20 states have call predecessors, (70), 20 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-02 20:22:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 267 transitions. [2022-11-02 20:22:03,264 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 267 transitions. Word has length 134 [2022-11-02 20:22:03,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:03,265 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 267 transitions. [2022-11-02 20:22:03,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 14 states have call predecessors, (34), 13 states have call successors, (34) [2022-11-02 20:22:03,265 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 267 transitions. [2022-11-02 20:22:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-02 20:22:03,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:03,268 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:03,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:03,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:22:03,468 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:22:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:03,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 2 times [2022-11-02 20:22:03,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:03,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584929434] [2022-11-02 20:22:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:03,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:03,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:22:03,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560794159] [2022-11-02 20:22:03,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:22:03,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:03,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:03,502 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:03,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e5065d-bc6d-451b-bf82-08fbcc13b1da/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:22:03,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:22:03,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-02 20:22:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 282 proven. 215 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-11-02 20:22:07,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:02,697 WARN L234 SmtUtils]: Spent 9.73s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:23:47,154 WARN L234 SmtUtils]: Spent 16.39s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)