./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.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_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/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_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/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_b3454621-62bd-4e55-9582-ee2f021391c6/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 c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --- 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 20:39:27,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:39:27,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:39:27,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:39:27,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:39:27,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:39:27,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:39:27,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:39:27,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:39:27,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:39:27,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:39:27,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:39:27,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:39:27,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:39:27,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:39:27,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:39:27,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:39:28,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:39:28,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:39:28,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:39:28,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:39:28,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:39:28,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:39:28,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:39:28,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:39:28,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:39:28,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:39:28,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:39:28,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:39:28,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:39:28,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:39:28,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:39:28,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:39:28,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:39:28,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:39:28,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:39:28,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:39:28,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:39:28,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:39:28,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:39:28,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:39:28,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:39:28,062 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:39:28,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:39:28,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:39:28,063 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:39:28,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:39:28,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:39:28,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:39:28,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:39:28,065 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:39:28,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:39:28,065 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:39:28,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:39:28,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:39:28,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:39:28,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:39:28,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:39:28,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:39:28,075 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:39:28,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:39:28,076 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:39:28,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:39:28,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:39:28,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:39:28,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:39:28,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:28,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:39:28,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:39:28,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:39:28,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:39:28,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:39:28,079 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:39:28,079 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:39:28,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:39:28,079 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_b3454621-62bd-4e55-9582-ee2f021391c6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e [2022-11-02 20:39:28,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:39:28,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:39:28,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:39:28,419 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:39:28,420 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:39:28,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-11-02 20:39:28,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/data/09e005339/39f889669d5346ad8cef3e443e5f8486/FLAGa3a9cd464 [2022-11-02 20:39:29,165 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:39:29,166 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-11-02 20:39:29,174 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/data/09e005339/39f889669d5346ad8cef3e443e5f8486/FLAGa3a9cd464 [2022-11-02 20:39:29,189 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/data/09e005339/39f889669d5346ad8cef3e443e5f8486 [2022-11-02 20:39:29,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:39:29,195 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:39:29,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:29,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:39:29,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:39:29,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b0f9b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29, skipping insertion in model container [2022-11-02 20:39:29,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:39:29,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:39:29,459 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_b3454621-62bd-4e55-9582-ee2f021391c6/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2022-11-02 20:39:29,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:29,486 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:39:29,499 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_b3454621-62bd-4e55-9582-ee2f021391c6/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2022-11-02 20:39:29,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:29,522 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:39:29,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29 WrapperNode [2022-11-02 20:39:29,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:29,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:29,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:39:29,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:39:29,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,562 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-11-02 20:39:29,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:29,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:39:29,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:39:29,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:39:29,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,587 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:39:29,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:39:29,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:39:29,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:39:29,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (1/1) ... [2022-11-02 20:39:29,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:29,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:29,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:39:29,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:39:29,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:39:29,688 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:39:29,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:39:29,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:39:29,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:39:29,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:39:29,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:39:29,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:39:29,770 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:39:29,773 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:39:29,960 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:39:29,967 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:39:29,968 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:39:29,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:29 BoogieIcfgContainer [2022-11-02 20:39:29,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:39:29,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:39:29,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:39:29,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:39:29,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:39:29" (1/3) ... [2022-11-02 20:39:29,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d7eeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:29, skipping insertion in model container [2022-11-02 20:39:29,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:29" (2/3) ... [2022-11-02 20:39:29,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d7eeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:29, skipping insertion in model container [2022-11-02 20:39:29,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:29" (3/3) ... [2022-11-02 20:39:29,981 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2022-11-02 20:39:30,005 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:39:30,005 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:39:30,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:30,087 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;@23a58452, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:30,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:39:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:39:30,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:39:30,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:30,106 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:30,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2022-11-02 20:39:30,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:30,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584939364] [2022-11-02 20:39:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:30,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:30,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:30,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584939364] [2022-11-02 20:39:30,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:39:30,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821826690] [2022-11-02 20:39:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:30,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:30,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:30,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:30,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:39:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:30,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:39:30,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:39:30,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:30,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821826690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:30,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:30,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:39:30,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700900410] [2022-11-02 20:39:30,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:30,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:39:30,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:39:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:39:30,572 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:39:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:30,607 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2022-11-02 20:39:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:39:30,610 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-02 20:39:30,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:30,618 INFO L225 Difference]: With dead ends: 67 [2022-11-02 20:39:30,619 INFO L226 Difference]: Without dead ends: 31 [2022-11-02 20:39:30,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 20:39:30,634 INFO L413 NwaCegarLoop]: 44 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, 44 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 20:39:30,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-02 20:39:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-02 20:39:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:39:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-11-02 20:39:30,692 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2022-11-02 20:39:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:30,692 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-11-02 20:39:30,693 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:39:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-11-02 20:39:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:39:30,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:30,697 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:30,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-02 20:39:30,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:30,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2022-11-02 20:39:30,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:30,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697005480] [2022-11-02 20:39:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:30,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:30,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:30,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188683484] [2022-11-02 20:39:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:30,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:30,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:30,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:30,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:39:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:31,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:39:31,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:39:31,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:31,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:31,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697005480] [2022-11-02 20:39:31,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:31,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188683484] [2022-11-02 20:39:31,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188683484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:31,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:31,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:39:31,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842147756] [2022-11-02 20:39:31,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:31,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:39:31,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:31,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:39:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:39:31,140 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:39:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:31,265 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-11-02 20:39:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:39:31,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-11-02 20:39:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:31,267 INFO L225 Difference]: With dead ends: 50 [2022-11-02 20:39:31,268 INFO L226 Difference]: Without dead ends: 43 [2022-11-02 20:39:31,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:39:31,270 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:31,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 113 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-02 20:39:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-11-02 20:39:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:39:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-02 20:39:31,297 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2022-11-02 20:39:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:31,298 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-02 20:39:31,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:39:31,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-02 20:39:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:39:31,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:31,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:31,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:31,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:31,519 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:31,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:31,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2022-11-02 20:39:31,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:31,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638589050] [2022-11-02 20:39:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:31,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:31,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:31,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611453953] [2022-11-02 20:39:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:31,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:31,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:31,559 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:31,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:39:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:31,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:39:31,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:39:31,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:31,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:31,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638589050] [2022-11-02 20:39:31,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:31,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611453953] [2022-11-02 20:39:31,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611453953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:31,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:31,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:31,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811796270] [2022-11-02 20:39:31,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:31,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:31,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:31,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:31,801 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:39:31,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:31,876 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-02 20:39:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:39:31,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-02 20:39:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:31,878 INFO L225 Difference]: With dead ends: 49 [2022-11-02 20:39:31,878 INFO L226 Difference]: Without dead ends: 47 [2022-11-02 20:39:31,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 20:39:31,880 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:31,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 137 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-02 20:39:31,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-11-02 20:39:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-02 20:39:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-11-02 20:39:31,892 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2022-11-02 20:39:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:31,892 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-11-02 20:39:31,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:39:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-11-02 20:39:31,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:39:31,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:31,894 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 20:39:31,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:32,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-02 20:39:32,099 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:32,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:32,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2022-11-02 20:39:32,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:32,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384423216] [2022-11-02 20:39:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:32,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:32,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:32,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843195296] [2022-11-02 20:39:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:32,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:32,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:32,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:32,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:39:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:32,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:39:32,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:39:32,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:39:32,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:32,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384423216] [2022-11-02 20:39:32,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:32,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843195296] [2022-11-02 20:39:32,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843195296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:32,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:32,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-02 20:39:32,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885107492] [2022-11-02 20:39:32,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:32,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:39:32,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:39:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:39:32,419 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:39:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:32,780 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2022-11-02 20:39:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:39:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-02 20:39:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:32,783 INFO L225 Difference]: With dead ends: 99 [2022-11-02 20:39:32,783 INFO L226 Difference]: Without dead ends: 92 [2022-11-02 20:39:32,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 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 20:39:32,785 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 55 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:32,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 242 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:39:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-02 20:39:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2022-11-02 20:39:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-02 20:39:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-11-02 20:39:32,805 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2022-11-02 20:39:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:32,805 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-11-02 20:39:32,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:39:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-11-02 20:39:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 20:39:32,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:32,807 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-02 20:39:32,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:33,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:33,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:33,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:33,023 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2022-11-02 20:39:33,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:33,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809324129] [2022-11-02 20:39:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:33,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:33,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:33,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643402037] [2022-11-02 20:39:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:33,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:33,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:33,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:33,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:39:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:39:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:39:33,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:33,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:33,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809324129] [2022-11-02 20:39:33,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643402037] [2022-11-02 20:39:33,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643402037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:33,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:33,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:33,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685774302] [2022-11-02 20:39:33,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:33,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:33,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:33,225 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:39:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:33,295 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2022-11-02 20:39:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:39:33,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-11-02 20:39:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:33,297 INFO L225 Difference]: With dead ends: 75 [2022-11-02 20:39:33,297 INFO L226 Difference]: Without dead ends: 73 [2022-11-02 20:39:33,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 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 20:39:33,298 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:33,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 131 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:33,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-02 20:39:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-11-02 20:39:33,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-02 20:39:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-11-02 20:39:33,315 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2022-11-02 20:39:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:33,315 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-11-02 20:39:33,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:39:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-11-02 20:39:33,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 20:39:33,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:33,317 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 20:39:33,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:33,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:33,539 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:33,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:33,539 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2022-11-02 20:39:33,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:33,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090474857] [2022-11-02 20:39:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:33,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:33,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:33,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42145613] [2022-11-02 20:39:33,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:33,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:33,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:33,577 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:33,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:39:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:39:33,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:39:33,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:39:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090474857] [2022-11-02 20:39:34,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42145613] [2022-11-02 20:39:34,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42145613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:34,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:34,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-02 20:39:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479002677] [2022-11-02 20:39:34,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:34,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:39:34,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:39:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:39:34,163 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:39:34,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:34,315 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2022-11-02 20:39:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:39:34,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2022-11-02 20:39:34,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:34,320 INFO L225 Difference]: With dead ends: 107 [2022-11-02 20:39:34,321 INFO L226 Difference]: Without dead ends: 105 [2022-11-02 20:39:34,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:39:34,327 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 15 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:34,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 252 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-11-02 20:39:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-02 20:39:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-11-02 20:39:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-02 20:39:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2022-11-02 20:39:34,371 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2022-11-02 20:39:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:34,371 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2022-11-02 20:39:34,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:39:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2022-11-02 20:39:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 20:39:34,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:34,380 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-02 20:39:34,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:34,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:39:34,598 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:34,599 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2022-11-02 20:39:34,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:34,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758537976] [2022-11-02 20:39:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:34,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:34,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:34,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123512702] [2022-11-02 20:39:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:34,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:34,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:34,620 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:34,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:39:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:34,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:39:34,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:39:34,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:34,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758537976] [2022-11-02 20:39:34,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123512702] [2022-11-02 20:39:34,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123512702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:34,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:34,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:34,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255684004] [2022-11-02 20:39:34,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:34,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:34,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:34,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:34,743 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:39:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:34,824 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2022-11-02 20:39:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:39:34,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-11-02 20:39:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:34,826 INFO L225 Difference]: With dead ends: 147 [2022-11-02 20:39:34,827 INFO L226 Difference]: Without dead ends: 145 [2022-11-02 20:39:34,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 20:39:34,828 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:34,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:34,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-02 20:39:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2022-11-02 20:39:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-02 20:39:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2022-11-02 20:39:34,864 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2022-11-02 20:39:34,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:34,864 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2022-11-02 20:39:34,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:39:34,865 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2022-11-02 20:39:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 20:39:34,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:34,866 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 20:39:34,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:35,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:35,091 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:35,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:35,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2022-11-02 20:39:35,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:35,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172578540] [2022-11-02 20:39:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:35,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:35,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:35,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659604595] [2022-11-02 20:39:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:35,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:35,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:35,108 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:35,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:39:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:35,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:39:35,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:39:35,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:35,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:35,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172578540] [2022-11-02 20:39:35,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:35,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659604595] [2022-11-02 20:39:35,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659604595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:35,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:39:35,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-02 20:39:35,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718274566] [2022-11-02 20:39:35,460 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:39:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:39:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:39:35,463 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:39:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:35,681 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2022-11-02 20:39:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:39:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-11-02 20:39:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:35,687 INFO L225 Difference]: With dead ends: 152 [2022-11-02 20:39:35,687 INFO L226 Difference]: Without dead ends: 150 [2022-11-02 20:39:35,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:39:35,689 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:35,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 204 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-02 20:39:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-11-02 20:39:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 94 states have internal predecessors, (118), 45 states have call successors, (45), 8 states have call predecessors, (45), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-02 20:39:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 207 transitions. [2022-11-02 20:39:35,737 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 207 transitions. Word has length 43 [2022-11-02 20:39:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:35,737 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 207 transitions. [2022-11-02 20:39:35,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:39:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 207 transitions. [2022-11-02 20:39:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 20:39:35,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:35,741 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:35,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:35,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:35,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:35,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2022-11-02 20:39:35,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:35,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428839378] [2022-11-02 20:39:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:35,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:35,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:35,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272123201] [2022-11-02 20:39:35,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:39:35,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:35,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:35,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:36,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:39:36,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:39:36,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:39:36,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:39:36,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:36,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:36,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428839378] [2022-11-02 20:39:36,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:36,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272123201] [2022-11-02 20:39:36,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272123201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:36,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:36,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283869140] [2022-11-02 20:39:36,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:36,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:36,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:36,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:36,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:36,099 INFO L87 Difference]: Start difference. First operand 147 states and 207 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:39:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:36,253 INFO L93 Difference]: Finished difference Result 186 states and 259 transitions. [2022-11-02 20:39:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:39:36,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-02 20:39:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:36,256 INFO L225 Difference]: With dead ends: 186 [2022-11-02 20:39:36,256 INFO L226 Difference]: Without dead ends: 130 [2022-11-02 20:39:36,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 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 20:39:36,263 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:36,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 139 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:36,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-02 20:39:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2022-11-02 20:39:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 77 states have internal predecessors, (92), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-02 20:39:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2022-11-02 20:39:36,299 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 43 [2022-11-02 20:39:36,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:36,300 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2022-11-02 20:39:36,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:39:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2022-11-02 20:39:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:39:36,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:36,304 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-02 20:39:36,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:36,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:36,524 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:36,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:36,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2022-11-02 20:39:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:36,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402850891] [2022-11-02 20:39:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:36,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:36,539 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:36,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162415621] [2022-11-02 20:39:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:36,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:36,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:36,545 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:36,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:39:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:36,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:39:36,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-02 20:39:36,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:36,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402850891] [2022-11-02 20:39:36,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162415621] [2022-11-02 20:39:36,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162415621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:36,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:36,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:36,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646275957] [2022-11-02 20:39:36,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:36,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:36,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:36,673 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 20:39:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:36,767 INFO L93 Difference]: Finished difference Result 190 states and 276 transitions. [2022-11-02 20:39:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:39:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 48 [2022-11-02 20:39:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:36,769 INFO L225 Difference]: With dead ends: 190 [2022-11-02 20:39:36,769 INFO L226 Difference]: Without dead ends: 188 [2022-11-02 20:39:36,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 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 20:39:36,770 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:36,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-02 20:39:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 166. [2022-11-02 20:39:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 69 states have call successors, (69), 9 states have call predecessors, (69), 9 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2022-11-02 20:39:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 240 transitions. [2022-11-02 20:39:36,811 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 240 transitions. Word has length 48 [2022-11-02 20:39:36,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:36,812 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 240 transitions. [2022-11-02 20:39:36,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 20:39:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 240 transitions. [2022-11-02 20:39:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:39:36,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:36,813 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:36,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:37,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:39:37,035 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:37,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:37,035 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2022-11-02 20:39:37,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:37,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102776590] [2022-11-02 20:39:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:37,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:37,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:37,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248242425] [2022-11-02 20:39:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:37,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:37,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:37,047 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:37,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:39:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:37,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 20:39:37,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-02 20:39:37,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-02 20:39:38,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:38,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102776590] [2022-11-02 20:39:38,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:38,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248242425] [2022-11-02 20:39:38,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248242425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:38,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:38,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-11-02 20:39:38,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964163366] [2022-11-02 20:39:38,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:38,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:39:38,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:38,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:39:38,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:39:38,376 INFO L87 Difference]: Start difference. First operand 166 states and 240 transitions. Second operand has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 20:39:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:49,192 INFO L93 Difference]: Finished difference Result 325 states and 486 transitions. [2022-11-02 20:39:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:39:49,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2022-11-02 20:39:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:49,196 INFO L225 Difference]: With dead ends: 325 [2022-11-02 20:39:49,196 INFO L226 Difference]: Without dead ends: 321 [2022-11-02 20:39:49,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:39:49,198 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 143 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:49,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 237 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-11-02 20:39:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-02 20:39:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 261. [2022-11-02 20:39:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 151 states have (on average 1.2119205298013245) internal successors, (183), 159 states have internal predecessors, (183), 97 states have call successors, (97), 12 states have call predecessors, (97), 12 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2022-11-02 20:39:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 376 transitions. [2022-11-02 20:39:49,356 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 376 transitions. Word has length 60 [2022-11-02 20:39:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:49,356 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 376 transitions. [2022-11-02 20:39:49,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 20:39:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 376 transitions. [2022-11-02 20:39:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 20:39:49,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:49,358 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2022-11-02 20:39:49,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:49,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:39:49,583 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2022-11-02 20:39:49,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495939443] [2022-11-02 20:39:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:49,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:49,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797425879] [2022-11-02 20:39:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:49,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:49,601 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:49,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:39:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:49,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:39:49,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-02 20:39:49,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-02 20:39:50,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:50,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495939443] [2022-11-02 20:39:50,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:50,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797425879] [2022-11-02 20:39:50,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797425879] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:50,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:39:50,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-11-02 20:39:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294159505] [2022-11-02 20:39:50,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:50,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:50,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:50,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:39:50,114 INFO L87 Difference]: Start difference. First operand 261 states and 376 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 20:39:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:50,348 INFO L93 Difference]: Finished difference Result 267 states and 381 transitions. [2022-11-02 20:39:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:39:50,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 70 [2022-11-02 20:39:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:50,357 INFO L225 Difference]: With dead ends: 267 [2022-11-02 20:39:50,358 INFO L226 Difference]: Without dead ends: 265 [2022-11-02 20:39:50,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:39:50,359 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:50,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-02 20:39:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-11-02 20:39:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 154 states have (on average 1.2077922077922079) internal successors, (186), 162 states have internal predecessors, (186), 97 states have call successors, (97), 13 states have call predecessors, (97), 13 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2022-11-02 20:39:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 379 transitions. [2022-11-02 20:39:50,513 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 379 transitions. Word has length 70 [2022-11-02 20:39:50,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:50,513 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 379 transitions. [2022-11-02 20:39:50,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 20:39:50,514 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 379 transitions. [2022-11-02 20:39:50,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 20:39:50,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:50,515 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 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 20:39:50,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:50,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:39:50,719 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:50,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:50,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2022-11-02 20:39:50,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:50,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503419044] [2022-11-02 20:39:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:50,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:50,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:50,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863185418] [2022-11-02 20:39:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:50,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:50,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:50,735 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:50,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:39:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:50,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:39:50,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-02 20:39:50,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-02 20:39:51,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:51,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503419044] [2022-11-02 20:39:51,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:51,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863185418] [2022-11-02 20:39:51,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863185418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:51,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:51,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-02 20:39:51,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413354996] [2022-11-02 20:39:51,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:51,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:39:51,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:39:51,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:39:51,089 INFO L87 Difference]: Start difference. First operand 265 states and 379 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:39:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:51,597 INFO L93 Difference]: Finished difference Result 279 states and 390 transitions. [2022-11-02 20:39:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:39:51,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2022-11-02 20:39:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:51,602 INFO L225 Difference]: With dead ends: 279 [2022-11-02 20:39:51,602 INFO L226 Difference]: Without dead ends: 277 [2022-11-02 20:39:51,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:39:51,605 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:51,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 144 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:39:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-02 20:39:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-11-02 20:39:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 163 states have (on average 1.196319018404908) internal successors, (195), 171 states have internal predecessors, (195), 97 states have call successors, (97), 16 states have call predecessors, (97), 16 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2022-11-02 20:39:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 388 transitions. [2022-11-02 20:39:51,847 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 388 transitions. Word has length 68 [2022-11-02 20:39:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:51,848 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 388 transitions. [2022-11-02 20:39:51,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:39:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 388 transitions. [2022-11-02 20:39:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 20:39:51,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:51,853 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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 20:39:51,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:52,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:52,067 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2022-11-02 20:39:52,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:52,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352615502] [2022-11-02 20:39:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:52,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:52,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:52,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213239764] [2022-11-02 20:39:52,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:39:52,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:52,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:52,081 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:52,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:39:52,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:39:52,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:52,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:39:52,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:39:52,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:52,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:52,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352615502] [2022-11-02 20:39:52,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:52,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213239764] [2022-11-02 20:39:52,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213239764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:52,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:52,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:52,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39753678] [2022-11-02 20:39:52,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:52,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:52,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:52,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:52,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:52,217 INFO L87 Difference]: Start difference. First operand 277 states and 388 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-02 20:39:52,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:52,466 INFO L93 Difference]: Finished difference Result 481 states and 671 transitions. [2022-11-02 20:39:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:39:52,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2022-11-02 20:39:52,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:52,469 INFO L225 Difference]: With dead ends: 481 [2022-11-02 20:39:52,469 INFO L226 Difference]: Without dead ends: 290 [2022-11-02 20:39:52,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:39:52,471 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:52,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 97 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-02 20:39:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 275. [2022-11-02 20:39:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 169 states have (on average 1.1893491124260356) internal successors, (201), 170 states have internal predecessors, (201), 89 states have call successors, (89), 16 states have call predecessors, (89), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-11-02 20:39:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 378 transitions. [2022-11-02 20:39:52,655 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 378 transitions. Word has length 73 [2022-11-02 20:39:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:52,656 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 378 transitions. [2022-11-02 20:39:52,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-02 20:39:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 378 transitions. [2022-11-02 20:39:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 20:39:52,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:52,658 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 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 20:39:52,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-02 20:39:52,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:52,883 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:52,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:52,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2022-11-02 20:39:52,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:52,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302975287] [2022-11-02 20:39:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:52,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:52,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:39:52,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216579287] [2022-11-02 20:39:52,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:39:52,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:52,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:52,903 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:52,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:39:52,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:39:52,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:52,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-02 20:39:52,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-02 20:39:53,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-02 20:39:54,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302975287] [2022-11-02 20:39:54,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:39:54,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216579287] [2022-11-02 20:39:54,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216579287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:54,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:54,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-11-02 20:39:54,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984590686] [2022-11-02 20:39:54,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:54,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:39:54,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:54,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:39:54,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:39:54,149 INFO L87 Difference]: Start difference. First operand 275 states and 378 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-02 20:40:01,829 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 20:40:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:02,629 INFO L93 Difference]: Finished difference Result 325 states and 448 transitions. [2022-11-02 20:40:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:40:02,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 73 [2022-11-02 20:40:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:02,634 INFO L225 Difference]: With dead ends: 325 [2022-11-02 20:40:02,634 INFO L226 Difference]: Without dead ends: 321 [2022-11-02 20:40:02,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:40:02,639 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 66 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 136 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:02,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 296 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 716 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-11-02 20:40:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-02 20:40:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 277. [2022-11-02 20:40:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 171 states have (on average 1.1812865497076024) internal successors, (202), 171 states have internal predecessors, (202), 89 states have call successors, (89), 17 states have call predecessors, (89), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-11-02 20:40:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 379 transitions. [2022-11-02 20:40:02,864 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 379 transitions. Word has length 73 [2022-11-02 20:40:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:02,864 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 379 transitions. [2022-11-02 20:40:02,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-02 20:40:02,865 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 379 transitions. [2022-11-02 20:40:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-02 20:40:02,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:02,878 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:02,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:03,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:40:03,087 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2022-11-02 20:40:03,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944233949] [2022-11-02 20:40:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:03,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:40:03,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880750360] [2022-11-02 20:40:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:03,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:03,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:03,101 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:03,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:40:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:03,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-02 20:40:03,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-02 20:40:04,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-02 20:40:12,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:12,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944233949] [2022-11-02 20:40:12,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:40:12,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880750360] [2022-11-02 20:40:12,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880750360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:12,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:40:12,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-11-02 20:40:12,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325989359] [2022-11-02 20:40:12,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:12,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:40:12,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:12,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:40:12,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:40:12,449 INFO L87 Difference]: Start difference. First operand 277 states and 379 transitions. Second operand has 27 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-02 20:40:22,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:40:25,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:40:36,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:40:39,302 WARN L539 Checker$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 20:40:44,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:40:46,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:40:50,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:40:57,464 WARN L539 Checker$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 20:41:00,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:41:03,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:41:05,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:41:08,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:41:14,602 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 20:41:22,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:22,742 INFO L93 Difference]: Finished difference Result 443 states and 611 transitions. [2022-11-02 20:41:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-02 20:41:22,743 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 87 [2022-11-02 20:41:22,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:22,745 INFO L225 Difference]: With dead ends: 443 [2022-11-02 20:41:22,746 INFO L226 Difference]: Without dead ends: 437 [2022-11-02 20:41:22,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=929, Invalid=4923, Unknown=0, NotChecked=0, Total=5852 [2022-11-02 20:41:22,748 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 181 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 403 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:22,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 532 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 2202 Invalid, 10 Unknown, 0 Unchecked, 47.2s Time] [2022-11-02 20:41:22,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-02 20:41:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 382. [2022-11-02 20:41:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 229 states have (on average 1.1965065502183405) internal successors, (274), 229 states have internal predecessors, (274), 129 states have call successors, (129), 24 states have call predecessors, (129), 23 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2022-11-02 20:41:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 531 transitions. [2022-11-02 20:41:23,010 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 531 transitions. Word has length 87 [2022-11-02 20:41:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:23,010 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 531 transitions. [2022-11-02 20:41:23,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-02 20:41:23,010 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 531 transitions. [2022-11-02 20:41:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-02 20:41:23,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:23,012 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:23,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:23,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:41:23,239 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:23,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1330396859, now seen corresponding path program 2 times [2022-11-02 20:41:23,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:23,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387410865] [2022-11-02 20:41:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:23,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:23,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:41:23,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399406628] [2022-11-02 20:41:23,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:41:23,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:23,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:23,252 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:23,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:41:23,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:41:23,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:23,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:41:23,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-02 20:41:23,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-02 20:41:23,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:23,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387410865] [2022-11-02 20:41:23,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:41:23,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399406628] [2022-11-02 20:41:23,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399406628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:23,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:41:23,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-11-02 20:41:23,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201922994] [2022-11-02 20:41:23,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:23,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:41:23,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:41:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:41:23,544 INFO L87 Difference]: Start difference. First operand 382 states and 531 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 20:41:24,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:24,676 INFO L93 Difference]: Finished difference Result 463 states and 644 transitions. [2022-11-02 20:41:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:41:24,677 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2022-11-02 20:41:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:24,680 INFO L225 Difference]: With dead ends: 463 [2022-11-02 20:41:24,680 INFO L226 Difference]: Without dead ends: 458 [2022-11-02 20:41:24,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:41:24,682 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 65 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:24,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 360 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:41:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-02 20:41:24,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 362. [2022-11-02 20:41:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 213 states have (on average 1.2018779342723005) internal successors, (256), 213 states have internal predecessors, (256), 125 states have call successors, (125), 24 states have call predecessors, (125), 23 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-02 20:41:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 505 transitions. [2022-11-02 20:41:24,956 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 505 transitions. Word has length 95 [2022-11-02 20:41:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:24,957 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 505 transitions. [2022-11-02 20:41:24,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 20:41:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 505 transitions. [2022-11-02 20:41:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-02 20:41:24,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:24,959 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:41:24,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:25,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:41:25,187 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:25,187 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2022-11-02 20:41:25,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:25,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686927357] [2022-11-02 20:41:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:25,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:25,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:41:25,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135641328] [2022-11-02 20:41:25,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:41:25,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:25,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:25,206 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:25,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:41:25,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:41:25,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:25,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-02 20:41:25,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 78 proven. 54 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-02 20:41:26,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 78 proven. 54 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-02 20:41:28,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:28,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686927357] [2022-11-02 20:41:28,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:41:28,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135641328] [2022-11-02 20:41:28,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135641328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:28,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:41:28,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2022-11-02 20:41:28,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083266676] [2022-11-02 20:41:28,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:28,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:41:28,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:28,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:41:28,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:41:28,589 INFO L87 Difference]: Start difference. First operand 362 states and 505 transitions. Second operand has 29 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 11 states have call predecessors, (28), 10 states have call successors, (28) [2022-11-02 20:41:35,536 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 20:41:39,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:41:43,916 WARN L539 Checker$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 20:41:45,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:41:47,484 WARN L539 Checker$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 20:41:53,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:00,890 WARN L539 Checker$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 20:42:03,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:05,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:07,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:15,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:18,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:29,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:31,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:34,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:41,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.75s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:43,952 WARN L539 Checker$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 20:42:47,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:50,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.91s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:42:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:51,356 INFO L93 Difference]: Finished difference Result 514 states and 714 transitions. [2022-11-02 20:42:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:42:51,357 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 11 states have call predecessors, (28), 10 states have call successors, (28) Word has length 107 [2022-11-02 20:42:51,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:51,360 INFO L225 Difference]: With dead ends: 514 [2022-11-02 20:42:51,361 INFO L226 Difference]: Without dead ends: 508 [2022-11-02 20:42:51,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 182 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=992, Invalid=3168, Unknown=0, NotChecked=0, Total=4160 [2022-11-02 20:42:51,363 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 231 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 628 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:51,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 415 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1666 Invalid, 14 Unknown, 0 Unchecked, 55.4s Time] [2022-11-02 20:42:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-11-02 20:42:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 441. [2022-11-02 20:42:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 255 states have (on average 1.2078431372549019) internal successors, (308), 255 states have internal predecessors, (308), 157 states have call successors, (157), 29 states have call predecessors, (157), 28 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-02 20:42:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 621 transitions. [2022-11-02 20:42:51,813 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 621 transitions. Word has length 107 [2022-11-02 20:42:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:51,813 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 621 transitions. [2022-11-02 20:42:51,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 11 states have call predecessors, (28), 10 states have call successors, (28) [2022-11-02 20:42:51,814 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 621 transitions. [2022-11-02 20:42:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-02 20:42:51,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:51,818 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:51,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:52,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:42:52,031 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:52,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1841111375, now seen corresponding path program 3 times [2022-11-02 20:42:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:52,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143776018] [2022-11-02 20:42:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:52,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:42:52,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024486149] [2022-11-02 20:42:52,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:42:52,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:52,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:52,053 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:52,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:42:52,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:42:52,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:52,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-02 20:42:52,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 88 proven. 39 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-11-02 20:42:54,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:55,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:55,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143776018] [2022-11-02 20:42:55,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:42:55,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024486149] [2022-11-02 20:42:55,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024486149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:55,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:42:55,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-02 20:42:55,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450441467] [2022-11-02 20:42:55,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:55,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:42:55,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:55,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:42:55,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:42:55,762 INFO L87 Difference]: Start difference. First operand 441 states and 621 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-02 20:42:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:59,005 INFO L93 Difference]: Finished difference Result 535 states and 749 transitions. [2022-11-02 20:42:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:42:59,006 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 134 [2022-11-02 20:42:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:59,016 INFO L225 Difference]: With dead ends: 535 [2022-11-02 20:42:59,016 INFO L226 Difference]: Without dead ends: 530 [2022-11-02 20:42:59,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:42:59,017 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 74 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:59,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 310 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-02 20:42:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-11-02 20:42:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 509. [2022-11-02 20:42:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 291 states have (on average 1.2096219931271477) internal successors, (352), 292 states have internal predecessors, (352), 185 states have call successors, (185), 33 states have call predecessors, (185), 32 states have return successors, (184), 183 states have call predecessors, (184), 184 states have call successors, (184) [2022-11-02 20:42:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 721 transitions. [2022-11-02 20:42:59,542 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 721 transitions. Word has length 134 [2022-11-02 20:42:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:59,543 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 721 transitions. [2022-11-02 20:42:59,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-02 20:42:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 721 transitions. [2022-11-02 20:42:59,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-02 20:42:59,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:59,547 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:59,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-02 20:42:59,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:59,775 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash 54025799, now seen corresponding path program 4 times [2022-11-02 20:42:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:59,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163596999] [2022-11-02 20:42:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:59,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:42:59,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967138227] [2022-11-02 20:42:59,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:42:59,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:59,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:59,791 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:59,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:42:59,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:42:59,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-02 20:42:59,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 141 proven. 128 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-11-02 20:43:01,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:04,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:04,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163596999] [2022-11-02 20:43:04,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:43:04,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967138227] [2022-11-02 20:43:04,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967138227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:04,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:43:04,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-11-02 20:43:04,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358901773] [2022-11-02 20:43:04,936 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:04,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:43:04,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:04,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:43:04,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:43:04,938 INFO L87 Difference]: Start difference. First operand 509 states and 721 transitions. Second operand has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2022-11-02 20:43:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:10,144 INFO L93 Difference]: Finished difference Result 660 states and 937 transitions. [2022-11-02 20:43:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:43:10,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 139 [2022-11-02 20:43:10,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:10,149 INFO L225 Difference]: With dead ends: 660 [2022-11-02 20:43:10,150 INFO L226 Difference]: Without dead ends: 655 [2022-11-02 20:43:10,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:43:10,151 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 89 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:10,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 551 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2062 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-02 20:43:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-11-02 20:43:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 635. [2022-11-02 20:43:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 360 states have (on average 1.2194444444444446) internal successors, (439), 361 states have internal predecessors, (439), 237 states have call successors, (237), 38 states have call predecessors, (237), 37 states have return successors, (236), 235 states have call predecessors, (236), 236 states have call successors, (236) [2022-11-02 20:43:11,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 912 transitions. [2022-11-02 20:43:11,108 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 912 transitions. Word has length 139 [2022-11-02 20:43:11,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:11,108 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 912 transitions. [2022-11-02 20:43:11,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2022-11-02 20:43:11,109 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 912 transitions. [2022-11-02 20:43:11,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-02 20:43:11,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:11,114 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:11,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:11,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:11,323 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:43:11,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1557127312, now seen corresponding path program 5 times [2022-11-02 20:43:11,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:11,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175956626] [2022-11-02 20:43:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:11,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:43:11,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787723987] [2022-11-02 20:43:11,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:43:11,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:11,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:11,347 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:11,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3454621-62bd-4e55-9582-ee2f021391c6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:43:11,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-02 20:43:11,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:43:11,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-02 20:43:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 72 proven. 117 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-11-02 20:43:14,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 66 proven. 111 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2022-11-02 20:43:34,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:34,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175956626] [2022-11-02 20:43:34,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:43:34,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787723987] [2022-11-02 20:43:34,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787723987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:34,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:34,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 40 [2022-11-02 20:43:34,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625044846] [2022-11-02 20:43:34,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:34,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 20:43:34,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:34,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 20:43:34,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:43:34,675 INFO L87 Difference]: Start difference. First operand 635 states and 912 transitions. Second operand has 40 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 16 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (47), 14 states have call predecessors, (47), 14 states have call successors, (47)