./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.8.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.8.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro --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 64bit --witnessprinter.graph.data.programhash eb677e43f1b11d15a5b970fe5fef1f84232f9ffcf4824eafcee26c2119fdea95 --- 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-8393723 [2022-11-18 19:33:10,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:33:10,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:33:10,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:33:10,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:33:10,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:33:10,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:33:10,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:33:10,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:33:10,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:33:10,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:33:10,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:33:10,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:33:10,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:33:10,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:33:10,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:33:10,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:33:10,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:33:10,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:33:10,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:33:10,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:33:10,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:33:10,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:33:10,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:33:10,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:33:10,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:33:10,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:33:10,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:33:10,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:33:10,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:33:10,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:33:10,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:33:10,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:33:10,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:33:10,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:33:10,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:33:10,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:33:10,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:33:10,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:33:10,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:33:10,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:33:10,609 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 19:33:10,648 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:33:10,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:33:10,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:33:10,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:33:10,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:33:10,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:33:10,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:33:10,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:33:10,651 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:33:10,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:33:10,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:33:10,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:33:10,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:33:10,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:33:10,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:33:10,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:33:10,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:33:10,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:33:10,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:33:10,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:33:10,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:33:10,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:33:10,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:33:10,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:33:10,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:33:10,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:33:10,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:33:10,655 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:33:10,656 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:33:10,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:33:10,656 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_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb677e43f1b11d15a5b970fe5fef1f84232f9ffcf4824eafcee26c2119fdea95 [2022-11-18 19:33:10,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:33:10,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:33:10,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:33:10,954 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:33:10,957 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:33:10,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.8.prop1-back-serstep.c [2022-11-18 19:33:11,021 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/data/8f171aa13/ed78a9fc40cd42d595576419a6360106/FLAG3b1eea6eb [2022-11-18 19:33:11,762 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:33:11,764 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.8.prop1-back-serstep.c [2022-11-18 19:33:11,782 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/data/8f171aa13/ed78a9fc40cd42d595576419a6360106/FLAG3b1eea6eb [2022-11-18 19:33:11,898 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/data/8f171aa13/ed78a9fc40cd42d595576419a6360106 [2022-11-18 19:33:11,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:33:11,902 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:33:11,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:33:11,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:33:11,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:33:11,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:33:11" (1/1) ... [2022-11-18 19:33:11,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d51890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:11, skipping insertion in model container [2022-11-18 19:33:11,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:33:11" (1/1) ... [2022-11-18 19:33:11,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:33:12,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:33:12,253 WARN L234 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_1ab2c373-4908-4b0b-970b-fdd69e871490/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.8.prop1-back-serstep.c[1014,1027] [2022-11-18 19:33:12,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:33:12,816 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:33:12,828 WARN L234 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_1ab2c373-4908-4b0b-970b-fdd69e871490/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.8.prop1-back-serstep.c[1014,1027] [2022-11-18 19:33:13,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:33:13,050 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:33:13,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13 WrapperNode [2022-11-18 19:33:13,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:33:13,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:33:13,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:33:13,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:33:13,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (1/1) ... [2022-11-18 19:33:13,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (1/1) ... [2022-11-18 19:33:13,451 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 5618 [2022-11-18 19:33:13,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:33:13,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:33:13,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:33:13,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:33:13,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (1/1) ... [2022-11-18 19:33:13,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (1/1) ... [2022-11-18 19:33:13,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (1/1) ... [2022-11-18 19:33:13,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (1/1) ... [2022-11-18 19:33:13,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (1/1) ... [2022-11-18 19:33:13,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (1/1) ... [2022-11-18 19:33:13,645 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (1/1) ... [2022-11-18 19:33:13,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (1/1) ... [2022-11-18 19:33:13,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:33:13,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:33:13,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:33:13,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:33:13,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (1/1) ... [2022-11-18 19:33:13,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:33:13,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:13,763 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:33:13,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:33:13,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:33:13,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:33:14,519 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:33:14,522 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:33:20,643 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:33:20,671 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:33:20,671 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 19:33:20,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:33:20 BoogieIcfgContainer [2022-11-18 19:33:20,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:33:20,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:33:20,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:33:20,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:33:20,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:33:11" (1/3) ... [2022-11-18 19:33:20,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49bfd098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:33:20, skipping insertion in model container [2022-11-18 19:33:20,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:13" (2/3) ... [2022-11-18 19:33:20,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49bfd098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:33:20, skipping insertion in model container [2022-11-18 19:33:20,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:33:20" (3/3) ... [2022-11-18 19:33:20,692 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lann.8.prop1-back-serstep.c [2022-11-18 19:33:20,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:33:20,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:33:20,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:33:20,861 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;@5e98340, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:33:20,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:33:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 1025 states, 1023 states have (on average 1.664711632453568) internal successors, (1703), 1024 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-18 19:33:20,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:20,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-11-18 19:33:20,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:20,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:20,922 INFO L85 PathProgramCache]: Analyzing trace with hash 872976604, now seen corresponding path program 1 times [2022-11-18 19:33:20,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:20,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371087866] [2022-11-18 19:33:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:20,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:22,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:22,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371087866] [2022-11-18 19:33:22,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371087866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:22,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:22,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:22,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956552625] [2022-11-18 19:33:22,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:22,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:33:22,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:22,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:33:22,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:33:22,685 INFO L87 Difference]: Start difference. First operand has 1025 states, 1023 states have (on average 1.664711632453568) internal successors, (1703), 1024 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:24,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 19:33:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:24,575 INFO L93 Difference]: Finished difference Result 3334 states and 5552 transitions. [2022-11-18 19:33:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:33:24,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2022-11-18 19:33:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:24,626 INFO L225 Difference]: With dead ends: 3334 [2022-11-18 19:33:24,641 INFO L226 Difference]: Without dead ends: 2311 [2022-11-18 19:33:24,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:24,652 INFO L413 NwaCegarLoop]: 2150 mSDtfsCounter, 5067 mSDsluCounter, 2598 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5067 SdHoareTripleChecker+Valid, 4748 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:24,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5067 Valid, 4748 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 19:33:24,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2022-11-18 19:33:24,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1023. [2022-11-18 19:33:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.662426614481409) internal successors, (1699), 1022 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1699 transitions. [2022-11-18 19:33:24,837 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1699 transitions. Word has length 187 [2022-11-18 19:33:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:24,840 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1699 transitions. [2022-11-18 19:33:24,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1699 transitions. [2022-11-18 19:33:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-18 19:33:24,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:24,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-11-18 19:33:24,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:33:24,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:24,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1294196988, now seen corresponding path program 1 times [2022-11-18 19:33:24,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:24,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671844421] [2022-11-18 19:33:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:24,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:25,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:25,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671844421] [2022-11-18 19:33:25,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671844421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:25,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:25,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:25,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28859665] [2022-11-18 19:33:25,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:25,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:33:25,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:25,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:33:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:33:25,986 INFO L87 Difference]: Start difference. First operand 1023 states and 1699 transitions. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:28,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 19:33:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:28,198 INFO L93 Difference]: Finished difference Result 4073 states and 6774 transitions. [2022-11-18 19:33:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:33:28,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2022-11-18 19:33:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:28,219 INFO L225 Difference]: With dead ends: 4073 [2022-11-18 19:33:28,219 INFO L226 Difference]: Without dead ends: 3052 [2022-11-18 19:33:28,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:28,227 INFO L413 NwaCegarLoop]: 2144 mSDtfsCounter, 4435 mSDsluCounter, 3382 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4435 SdHoareTripleChecker+Valid, 5526 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:28,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4435 Valid, 5526 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-18 19:33:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2022-11-18 19:33:28,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 1295. [2022-11-18 19:33:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 1.6622874806800618) internal successors, (2151), 1294 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2151 transitions. [2022-11-18 19:33:28,339 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2151 transitions. Word has length 188 [2022-11-18 19:33:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:28,343 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 2151 transitions. [2022-11-18 19:33:28,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2151 transitions. [2022-11-18 19:33:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2022-11-18 19:33:28,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:28,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:28,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:33:28,387 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1136810052, now seen corresponding path program 1 times [2022-11-18 19:33:28,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:28,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250212013] [2022-11-18 19:33:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:28,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:09,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:09,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250212013] [2022-11-18 19:34:09,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250212013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:34:09,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645125497] [2022-11-18 19:34:09,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:09,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:09,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:34:09,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:34:09,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:34:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:12,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 6664 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 19:34:12,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:20,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:33,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645125497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:33,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:34:33,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 11] total 24 [2022-11-18 19:34:33,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640624357] [2022-11-18 19:34:33,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:33,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 19:34:33,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:33,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 19:34:33,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-11-18 19:34:33,969 INFO L87 Difference]: Start difference. First operand 1295 states and 2151 transitions. Second operand has 24 states, 24 states have (on average 108.04166666666667) internal successors, (2593), 24 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:35:06,831 INFO L93 Difference]: Finished difference Result 12766 states and 21091 transitions. [2022-11-18 19:35:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 19:35:06,848 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 108.04166666666667) internal successors, (2593), 24 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 867 [2022-11-18 19:35:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:35:06,885 INFO L225 Difference]: With dead ends: 12766 [2022-11-18 19:35:06,886 INFO L226 Difference]: Without dead ends: 11745 [2022-11-18 19:35:06,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1762 GetRequests, 1717 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=578, Invalid=1584, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 19:35:06,892 INFO L413 NwaCegarLoop]: 1334 mSDtfsCounter, 66769 mSDsluCounter, 11015 mSDsCounter, 0 mSdLazyCounter, 27158 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66769 SdHoareTripleChecker+Valid, 12349 SdHoareTripleChecker+Invalid, 27482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 27158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:35:06,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66769 Valid, 12349 Invalid, 27482 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [324 Valid, 27158 Invalid, 0 Unknown, 0 Unchecked, 30.3s Time] [2022-11-18 19:35:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11745 states. [2022-11-18 19:35:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11745 to 2709. [2022-11-18 19:35:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 1.6617429837518465) internal successors, (4500), 2708 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 4500 transitions. [2022-11-18 19:35:07,023 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 4500 transitions. Word has length 867 [2022-11-18 19:35:07,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:35:07,027 INFO L495 AbstractCegarLoop]: Abstraction has 2709 states and 4500 transitions. [2022-11-18 19:35:07,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 108.04166666666667) internal successors, (2593), 24 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 4500 transitions. [2022-11-18 19:35:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 869 [2022-11-18 19:35:07,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:35:07,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:07,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:35:07,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:07,270 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:35:07,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:07,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1465156480, now seen corresponding path program 1 times [2022-11-18 19:35:07,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:07,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112472599] [2022-11-18 19:35:07,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:07,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-18 19:36:51,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:51,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112472599] [2022-11-18 19:36:51,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112472599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:36:51,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:36:51,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:36:51,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114882300] [2022-11-18 19:36:51,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:36:51,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:36:51,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:51,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:36:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:36:51,399 INFO L87 Difference]: Start difference. First operand 2709 states and 4500 transitions. Second operand has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:36:52,476 INFO L93 Difference]: Finished difference Result 6932 states and 11519 transitions. [2022-11-18 19:36:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:36:52,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 868 [2022-11-18 19:36:52,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:36:52,495 INFO L225 Difference]: With dead ends: 6932 [2022-11-18 19:36:52,495 INFO L226 Difference]: Without dead ends: 5911 [2022-11-18 19:36:52,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:36:52,499 INFO L413 NwaCegarLoop]: 2144 mSDtfsCounter, 5057 mSDsluCounter, 3824 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5057 SdHoareTripleChecker+Valid, 5968 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:36:52,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5057 Valid, 5968 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 19:36:52,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2022-11-18 19:36:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 2709. [2022-11-18 19:36:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 1.6617429837518465) internal successors, (4500), 2708 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 4500 transitions. [2022-11-18 19:36:52,588 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 4500 transitions. Word has length 868 [2022-11-18 19:36:52,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:36:52,590 INFO L495 AbstractCegarLoop]: Abstraction has 2709 states and 4500 transitions. [2022-11-18 19:36:52,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:52,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 4500 transitions. [2022-11-18 19:36:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-11-18 19:36:52,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:36:52,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:52,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:36:52,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:36:52,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:52,601 INFO L85 PathProgramCache]: Analyzing trace with hash -260213388, now seen corresponding path program 1 times [2022-11-18 19:36:52,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:52,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64530076] [2022-11-18 19:36:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:52,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:37:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 80 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:16,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:16,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64530076] [2022-11-18 19:38:16,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64530076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:16,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440698245] [2022-11-18 19:38:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:16,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:16,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:16,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:16,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:38:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:19,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 6670 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-18 19:38:19,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:24,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:32,179 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-18 19:38:32,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 19:38:32,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:32,381 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-18 19:38:32,386 INFO L158 Benchmark]: Toolchain (without parser) took 320483.61ms. Allocated memory was 100.7MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 66.8MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2022-11-18 19:38:32,386 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 100.7MB. Free memory is still 55.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 19:38:32,387 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1146.59ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 66.5MB in the beginning and 55.1MB in the end (delta: 11.5MB). Peak memory consumption was 43.2MB. Max. memory is 16.1GB. [2022-11-18 19:38:32,387 INFO L158 Benchmark]: Boogie Procedure Inliner took 398.33ms. Allocated memory was 121.6MB in the beginning and 180.4MB in the end (delta: 58.7MB). Free memory was 55.1MB in the beginning and 105.5MB in the end (delta: -50.4MB). Peak memory consumption was 35.3MB. Max. memory is 16.1GB. [2022-11-18 19:38:32,387 INFO L158 Benchmark]: Boogie Preprocessor took 263.25ms. Allocated memory is still 180.4MB. Free memory was 105.5MB in the beginning and 80.3MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-18 19:38:32,388 INFO L158 Benchmark]: RCFGBuilder took 6958.54ms. Allocated memory was 180.4MB in the beginning and 509.6MB in the end (delta: 329.3MB). Free memory was 80.3MB in the beginning and 377.2MB in the end (delta: -296.8MB). Peak memory consumption was 294.5MB. Max. memory is 16.1GB. [2022-11-18 19:38:32,391 INFO L158 Benchmark]: TraceAbstraction took 311705.02ms. Allocated memory was 509.6MB in the beginning and 2.3GB in the end (delta: 1.8GB). Free memory was 377.2MB in the beginning and 1.5GB in the end (delta: -1.2GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2022-11-18 19:38:32,393 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 100.7MB. Free memory is still 55.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1146.59ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 66.5MB in the beginning and 55.1MB in the end (delta: 11.5MB). Peak memory consumption was 43.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 398.33ms. Allocated memory was 121.6MB in the beginning and 180.4MB in the end (delta: 58.7MB). Free memory was 55.1MB in the beginning and 105.5MB in the end (delta: -50.4MB). Peak memory consumption was 35.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 263.25ms. Allocated memory is still 180.4MB. Free memory was 105.5MB in the beginning and 80.3MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * RCFGBuilder took 6958.54ms. Allocated memory was 180.4MB in the beginning and 509.6MB in the end (delta: 329.3MB). Free memory was 80.3MB in the beginning and 377.2MB in the end (delta: -296.8MB). Peak memory consumption was 294.5MB. Max. memory is 16.1GB. * TraceAbstraction took 311705.02ms. Allocated memory was 509.6MB in the beginning and 2.3GB in the end (delta: 1.8GB). Free memory was 377.2MB in the beginning and 1.5GB in the end (delta: -1.2GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-18 19:38:32,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.8.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro --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 64bit --witnessprinter.graph.data.programhash eb677e43f1b11d15a5b970fe5fef1f84232f9ffcf4824eafcee26c2119fdea95 --- 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-8393723 [2022-11-18 19:38:34,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:38:34,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:38:34,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:38:34,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:38:34,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:38:34,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:38:34,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:38:34,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:38:34,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:38:34,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:38:34,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:38:34,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:38:34,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:38:34,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:38:34,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:38:34,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:38:34,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:38:34,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:38:34,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:38:34,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:38:34,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:38:34,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:38:34,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:38:34,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:38:34,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:38:34,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:38:34,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:38:34,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:38:34,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:38:34,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:38:34,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:38:34,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:38:34,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:38:34,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:38:34,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:38:34,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:38:34,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:38:34,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:38:34,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:38:34,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:38:34,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-18 19:38:34,919 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:38:34,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:38:34,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:38:34,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:38:34,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:38:34,921 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:38:34,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:38:34,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:38:34,922 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:38:34,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:38:34,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:38:34,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:38:34,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:38:34,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:38:34,924 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 19:38:34,924 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 19:38:34,925 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 19:38:34,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:38:34,925 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:38:34,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:38:34,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:38:34,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:38:34,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:38:34,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:38:34,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:38:34,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:38:34,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:38:34,928 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 19:38:34,928 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 19:38:34,929 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:38:34,929 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:38:34,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:38:34,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 19:38:34,930 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb677e43f1b11d15a5b970fe5fef1f84232f9ffcf4824eafcee26c2119fdea95 [2022-11-18 19:38:35,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:38:35,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:38:35,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:38:35,317 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:38:35,320 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:38:35,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.8.prop1-back-serstep.c [2022-11-18 19:38:35,396 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/data/e651123da/f11fcad05a384997aabecf2ab197388f/FLAGdb53c6010 [2022-11-18 19:38:36,148 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:38:36,148 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.8.prop1-back-serstep.c [2022-11-18 19:38:36,181 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/data/e651123da/f11fcad05a384997aabecf2ab197388f/FLAGdb53c6010 [2022-11-18 19:38:36,306 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/data/e651123da/f11fcad05a384997aabecf2ab197388f [2022-11-18 19:38:36,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:38:36,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:38:36,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:38:36,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:38:36,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:38:36,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:38:36" (1/1) ... [2022-11-18 19:38:36,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@922ae21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:36, skipping insertion in model container [2022-11-18 19:38:36,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:38:36" (1/1) ... [2022-11-18 19:38:36,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:38:36,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:38:36,658 WARN L234 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_1ab2c373-4908-4b0b-970b-fdd69e871490/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.8.prop1-back-serstep.c[1014,1027] [2022-11-18 19:38:37,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:38:37,265 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:38:37,277 WARN L234 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_1ab2c373-4908-4b0b-970b-fdd69e871490/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.8.prop1-back-serstep.c[1014,1027] [2022-11-18 19:38:37,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:38:37,521 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:38:37,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37 WrapperNode [2022-11-18 19:38:37,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:38:37,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:38:37,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:38:37,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:38:37,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (1/1) ... [2022-11-18 19:38:37,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (1/1) ... [2022-11-18 19:38:37,755 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3252 [2022-11-18 19:38:37,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:38:37,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:38:37,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:38:37,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:38:37,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (1/1) ... [2022-11-18 19:38:37,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (1/1) ... [2022-11-18 19:38:37,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (1/1) ... [2022-11-18 19:38:37,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (1/1) ... [2022-11-18 19:38:37,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (1/1) ... [2022-11-18 19:38:37,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (1/1) ... [2022-11-18 19:38:37,912 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (1/1) ... [2022-11-18 19:38:37,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (1/1) ... [2022-11-18 19:38:37,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:38:37,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:38:37,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:38:37,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:38:37,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (1/1) ... [2022-11-18 19:38:38,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:38:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:38,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:38:38,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:38:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:38:38,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:38:38,890 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:38:38,892 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:38:45,121 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:38:45,128 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:38:45,128 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 19:38:45,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:38:45 BoogieIcfgContainer [2022-11-18 19:38:45,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:38:45,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:38:45,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:38:45,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:38:45,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:38:36" (1/3) ... [2022-11-18 19:38:45,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c25d8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:38:45, skipping insertion in model container [2022-11-18 19:38:45,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:38:37" (2/3) ... [2022-11-18 19:38:45,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c25d8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:38:45, skipping insertion in model container [2022-11-18 19:38:45,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:38:45" (3/3) ... [2022-11-18 19:38:45,140 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lann.8.prop1-back-serstep.c [2022-11-18 19:38:45,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:38:45,158 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:38:45,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:38:45,234 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;@7518e5d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:38:45,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:38:45,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 19:38:45,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:45,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 19:38:45,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:38:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:45,253 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-18 19:38:45,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:45,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700192587] [2022-11-18 19:38:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:45,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:45,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:45,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:45,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 19:38:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:46,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 19:38:46,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:46,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:38:46,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:46,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700192587] [2022-11-18 19:38:46,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700192587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:46,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:38:46,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:38:46,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563674038] [2022-11-18 19:38:46,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:46,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:38:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:46,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:38:46,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:38:46,151 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:46,748 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-18 19:38:46,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:38:46,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 19:38:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:46,757 INFO L225 Difference]: With dead ends: 20 [2022-11-18 19:38:46,757 INFO L226 Difference]: Without dead ends: 11 [2022-11-18 19:38:46,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:38:46,762 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:46,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 19:38:46,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-18 19:38:46,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-18 19:38:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-18 19:38:46,791 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-18 19:38:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:46,792 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-18 19:38:46,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-18 19:38:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 19:38:46,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:46,793 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:46,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:47,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:47,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:38:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:47,007 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-18 19:38:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:47,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227679214] [2022-11-18 19:38:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:47,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:47,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:47,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:47,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ab2c373-4908-4b0b-970b-fdd69e871490/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 19:38:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:48,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 145 conjunts are in the unsatisfiable core [2022-11-18 19:38:48,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:51,491 INFO L328 TraceCheckSpWp]: Computing backward predicates...