./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 21f79dea7aad8546a3e0176902289dccc4338c9a5ec0cb74e31e8a84f408fa52 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:28:19,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:28:19,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:28:19,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:28:19,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:28:19,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:28:19,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:28:19,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:28:19,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:28:19,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:28:19,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:28:19,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:28:19,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:28:19,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:28:19,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:28:19,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:28:19,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:28:19,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:28:19,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:28:19,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:28:19,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:28:19,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:28:19,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:28:19,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:28:19,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:28:19,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:28:19,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:28:19,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:28:19,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:28:19,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:28:19,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:28:19,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:28:19,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:28:19,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:28:19,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:28:19,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:28:19,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:28:19,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:28:19,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:28:19,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:28:19,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:28:19,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:28:19,145 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:28:19,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:28:19,145 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:28:19,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:28:19,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:28:19,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:28:19,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:28:19,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:28:19,148 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:28:19,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:28:19,153 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:28:19,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:28:19,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:28:19,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:28:19,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:28:19,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:28:19,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:28:19,154 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:28:19,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:28:19,154 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:28:19,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:28:19,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:28:19,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:28:19,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:28:19,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:28:19,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:28:19,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:28:19,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:28:19,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:28:19,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:28:19,157 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:28:19,157 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:28:19,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:28:19,158 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_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21f79dea7aad8546a3e0176902289dccc4338c9a5ec0cb74e31e8a84f408fa52 [2022-11-02 20:28:19,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:28:19,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:28:19,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:28:19,458 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:28:19,461 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:28:19,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound20.c [2022-11-02 20:28:19,548 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/data/7fe61f5fc/c495136a442741db86c14c4a18dc2078/FLAG92a35ba12 [2022-11-02 20:28:19,991 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:28:19,992 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound20.c [2022-11-02 20:28:19,999 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/data/7fe61f5fc/c495136a442741db86c14c4a18dc2078/FLAG92a35ba12 [2022-11-02 20:28:20,376 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/data/7fe61f5fc/c495136a442741db86c14c4a18dc2078 [2022-11-02 20:28:20,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:28:20,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:28:20,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:28:20,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:28:20,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:28:20,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436f9f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20, skipping insertion in model container [2022-11-02 20:28:20,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:28:20,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:28:20,577 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound20.c[537,550] [2022-11-02 20:28:20,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:28:20,625 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:28:20,644 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound20.c[537,550] [2022-11-02 20:28:20,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:28:20,680 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:28:20,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20 WrapperNode [2022-11-02 20:28:20,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:28:20,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:28:20,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:28:20,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:28:20,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,722 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-02 20:28:20,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:28:20,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:28:20,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:28:20,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:28:20,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,754 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:28:20,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:28:20,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:28:20,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:28:20,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (1/1) ... [2022-11-02 20:28:20,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:28:20,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:20,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:28:20,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:28:20,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:28:20,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:28:20,843 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:28:20,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:28:20,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:28:20,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:28:20,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:28:20,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:28:20,918 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:28:20,920 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:28:21,110 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:28:21,116 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:28:21,116 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:28:21,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:28:21 BoogieIcfgContainer [2022-11-02 20:28:21,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:28:21,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:28:21,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:28:21,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:28:21,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:28:20" (1/3) ... [2022-11-02 20:28:21,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3796983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:28:21, skipping insertion in model container [2022-11-02 20:28:21,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:20" (2/3) ... [2022-11-02 20:28:21,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3796983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:28:21, skipping insertion in model container [2022-11-02 20:28:21,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:28:21" (3/3) ... [2022-11-02 20:28:21,141 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound20.c [2022-11-02 20:28:21,159 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:28:21,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:28:21,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:28:21,234 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;@6028b3b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:28:21,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:28:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:28:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:28:21,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:21,247 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:21,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:21,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:21,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1908356592, now seen corresponding path program 1 times [2022-11-02 20:28:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533104435] [2022-11-02 20:28:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:21,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:21,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:21,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533104435] [2022-11-02 20:28:21,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:28:21,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463593161] [2022-11-02 20:28:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:21,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:21,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:21,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:21,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:28:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:21,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:28:21,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:28:21,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:28:21,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463593161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:21,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:21,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:28:21,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978070746] [2022-11-02 20:28:21,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:21,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:28:21,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:21,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:28:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:28:21,720 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:28:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:21,758 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2022-11-02 20:28:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:28:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-11-02 20:28:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:21,771 INFO L225 Difference]: With dead ends: 51 [2022-11-02 20:28:21,772 INFO L226 Difference]: Without dead ends: 23 [2022-11-02 20:28:21,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:28:21,778 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:21,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:28:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-02 20:28:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-02 20:28:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:28:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-11-02 20:28:21,818 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 28 [2022-11-02 20:28:21,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:21,819 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-11-02 20:28:21,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:28:21,820 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-11-02 20:28:21,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:28:21,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:21,822 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:21,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:22,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-02 20:28:22,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:22,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:22,051 INFO L85 PathProgramCache]: Analyzing trace with hash 384922192, now seen corresponding path program 1 times [2022-11-02 20:28:22,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:22,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438453705] [2022-11-02 20:28:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:22,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:28:22,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10768518] [2022-11-02 20:28:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:22,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:22,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:22,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:22,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:28:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:28:22,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:28:22,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:28:22,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:22,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438453705] [2022-11-02 20:28:22,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:28:22,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10768518] [2022-11-02 20:28:22,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10768518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:22,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:22,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:28:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572580005] [2022-11-02 20:28:22,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:22,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:28:22,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:28:22,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:28:22,448 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:28:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:22,566 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-11-02 20:28:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:28:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-02 20:28:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:22,569 INFO L225 Difference]: With dead ends: 35 [2022-11-02 20:28:22,569 INFO L226 Difference]: Without dead ends: 32 [2022-11-02 20:28:22,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:28:22,571 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:22,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 80 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:28:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-02 20:28:22,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-11-02 20:28:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:28:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-02 20:28:22,581 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 29 [2022-11-02 20:28:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:22,583 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-02 20:28:22,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:28:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-02 20:28:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 20:28:22,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:22,585 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:22,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:22,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:22,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:22,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:22,802 INFO L85 PathProgramCache]: Analyzing trace with hash -449676311, now seen corresponding path program 1 times [2022-11-02 20:28:22,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:22,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791847220] [2022-11-02 20:28:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:22,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:22,824 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:28:22,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757330396] [2022-11-02 20:28:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:22,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:22,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:22,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:22,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013308ed-7a45-46cf-ad83-144023653110/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process