./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/Mono3_1.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_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/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_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/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_d627c96f-112a-4ce2-ab17-7e2b387d65fc/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 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 --- 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 20:49:57,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:49:57,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:49:57,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:49:57,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:49:57,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:49:57,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:49:57,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:49:58,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:49:58,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:49:58,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:49:58,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:49:58,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:49:58,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:49:58,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:49:58,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:49:58,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:49:58,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:49:58,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:49:58,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:49:58,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:49:58,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:49:58,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:49:58,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:49:58,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:49:58,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:49:58,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:49:58,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:49:58,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:49:58,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:49:58,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:49:58,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:49:58,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:49:58,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:49:58,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:49:58,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:49:58,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:49:58,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:49:58,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:49:58,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:49:58,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:49:58,068 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:49:58,090 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:49:58,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:49:58,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:49:58,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:49:58,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:49:58,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:49:58,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:49:58,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:49:58,099 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:49:58,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:49:58,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:49:58,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:49:58,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:49:58,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:49:58,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:49:58,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:49:58,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:49:58,103 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:49:58,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:49:58,105 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:49:58,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:49:58,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:49:58,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:49:58,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:49:58,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:58,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:49:58,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:49:58,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:49:58,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:49:58,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:49:58,116 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:49:58,116 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:49:58,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:49:58,117 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_d627c96f-112a-4ce2-ab17-7e2b387d65fc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 [2022-11-02 20:49:58,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:49:58,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:49:58,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:49:58,486 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:49:58,487 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:49:58,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2022-11-02 20:49:58,589 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/data/a7f6fa601/87df2f2da140400ab8af175f4463a34e/FLAG95b9b58dd [2022-11-02 20:49:59,123 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:49:59,124 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2022-11-02 20:49:59,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/data/a7f6fa601/87df2f2da140400ab8af175f4463a34e/FLAG95b9b58dd [2022-11-02 20:49:59,487 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/data/a7f6fa601/87df2f2da140400ab8af175f4463a34e [2022-11-02 20:49:59,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:49:59,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:49:59,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:59,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:49:59,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:49:59,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@291d5b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59, skipping insertion in model container [2022-11-02 20:49:59,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:49:59,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:49:59,815 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_d627c96f-112a-4ce2-ab17-7e2b387d65fc/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2022-11-02 20:49:59,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:59,847 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:49:59,870 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_d627c96f-112a-4ce2-ab17-7e2b387d65fc/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2022-11-02 20:49:59,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:59,893 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:49:59,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59 WrapperNode [2022-11-02 20:49:59,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:59,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:59,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:49:59,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:49:59,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,938 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-11-02 20:49:59,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:59,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:49:59,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:49:59,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:49:59,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,967 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:49:59,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:49:59,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:49:59,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:49:59,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (1/1) ... [2022-11-02 20:49:59,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:59,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:00,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:50:00,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:50:00,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:50:00,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:50:00,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:50:00,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:50:00,110 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:50:00,112 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:50:00,245 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:50:00,253 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:50:00,253 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:50:00,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:50:00 BoogieIcfgContainer [2022-11-02 20:50:00,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:50:00,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:50:00,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:50:00,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:50:00,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:49:59" (1/3) ... [2022-11-02 20:50:00,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfdc32a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:50:00, skipping insertion in model container [2022-11-02 20:50:00,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:59" (2/3) ... [2022-11-02 20:50:00,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfdc32a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:50:00, skipping insertion in model container [2022-11-02 20:50:00,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:50:00" (3/3) ... [2022-11-02 20:50:00,275 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2022-11-02 20:50:00,301 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:50:00,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:50:00,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:00,378 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;@29239545, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:00,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:50:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-11-02 20:50:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:50:00,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:00,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:50:00,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:00,398 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-11-02 20:50:00,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:00,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742971030] [2022-11-02 20:50:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:00,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:00,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742971030] [2022-11-02 20:50:00,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742971030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:00,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:00,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:00,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217983634] [2022-11-02 20:50:00,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:00,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:50:00,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:00,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:50:00,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:50:00,597 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-02 20:50:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:00,613 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-11-02 20:50:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:50:00,616 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-11-02 20:50:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:00,626 INFO L225 Difference]: With dead ends: 21 [2022-11-02 20:50:00,626 INFO L226 Difference]: Without dead ends: 9 [2022-11-02 20:50:00,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 20:50:00,635 INFO L413 NwaCegarLoop]: 14 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, 14 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 20:50:00,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:50:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-02 20:50:00,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-02 20:50:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-11-02 20:50:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-02 20:50:00,672 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-11-02 20:50:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:00,673 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-02 20:50:00,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-02 20:50:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-02 20:50:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:50:00,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:00,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:50:00,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:50:00,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-11-02 20:50:00,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:00,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569488709] [2022-11-02 20:50:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:00,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:00,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:00,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569488709] [2022-11-02 20:50:00,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569488709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:00,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:00,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:50:00,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861033763] [2022-11-02 20:50:00,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:00,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:00,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:00,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:00,797 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:50:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:00,822 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-11-02 20:50:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:00,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-02 20:50:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:00,824 INFO L225 Difference]: With dead ends: 19 [2022-11-02 20:50:00,825 INFO L226 Difference]: Without dead ends: 12 [2022-11-02 20:50:00,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:00,827 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:00,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:50:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-02 20:50:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-02 20:50:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2022-11-02 20:50:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-02 20:50:00,832 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-11-02 20:50:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:00,833 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-02 20:50:00,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:50:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-02 20:50:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 20:50:00,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:00,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:00,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:50:00,835 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:00,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:00,836 INFO L85 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2022-11-02 20:50:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:00,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611268957] [2022-11-02 20:50:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:00,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:00,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:00,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611268957] [2022-11-02 20:50:00,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611268957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:00,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079528195] [2022-11-02 20:50:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:00,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:00,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:01,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:01,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:50:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:01,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:50:01,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:01,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:01,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079528195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:01,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:01,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 7] total 12 [2022-11-02 20:50:01,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033323907] [2022-11-02 20:50:01,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:01,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:50:01,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:01,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:50:01,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:50:01,483 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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) [2022-11-02 20:50:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:01,822 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-02 20:50:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:50:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 9 [2022-11-02 20:50:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:01,823 INFO L225 Difference]: With dead ends: 31 [2022-11-02 20:50:01,824 INFO L226 Difference]: Without dead ends: 20 [2022-11-02 20:50:01,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:50:01,826 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:01,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 19 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:50:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-02 20:50:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-11-02 20:50:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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) [2022-11-02 20:50:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-02 20:50:01,832 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2022-11-02 20:50:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:01,833 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-02 20:50:01,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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) [2022-11-02 20:50:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-02 20:50:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:50:01,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:01,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:01,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:02,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:02,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:02,036 INFO L85 PathProgramCache]: Analyzing trace with hash 329880921, now seen corresponding path program 1 times [2022-11-02 20:50:02,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:02,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162732841] [2022-11-02 20:50:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:02,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:02,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:02,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162732841] [2022-11-02 20:50:02,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162732841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:02,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543981255] [2022-11-02 20:50:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:02,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:02,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:02,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:02,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:50:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:02,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:50:02,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:50:02,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:50:02,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543981255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:02,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:02,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-11-02 20:50:02,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936769467] [2022-11-02 20:50:02,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:02,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:50:02,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:02,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:50:02,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:50:02,499 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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) [2022-11-02 20:50:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:02,884 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-11-02 20:50:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:50:02,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 15 [2022-11-02 20:50:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:02,885 INFO L225 Difference]: With dead ends: 56 [2022-11-02 20:50:02,885 INFO L226 Difference]: Without dead ends: 43 [2022-11-02 20:50:02,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:50:02,887 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:02,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:50:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-02 20:50:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-11-02 20:50:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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) [2022-11-02 20:50:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-02 20:50:02,906 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2022-11-02 20:50:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:02,907 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-02 20:50:02,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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) [2022-11-02 20:50:02,908 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-02 20:50:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:50:02,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:02,911 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:02,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:03,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:03,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:03,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1412883461, now seen corresponding path program 2 times [2022-11-02 20:50:03,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896626849] [2022-11-02 20:50:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:03,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:50:03,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:03,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896626849] [2022-11-02 20:50:03,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896626849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:03,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194192606] [2022-11-02 20:50:03,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:50:03,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:03,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:03,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:03,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:50:03,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:50:03,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:03,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:50:03,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:50:03,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:50:03,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194192606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:03,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:03,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-11-02 20:50:03,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937654499] [2022-11-02 20:50:03,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:03,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:50:03,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:50:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:50:03,743 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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) [2022-11-02 20:50:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:04,507 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2022-11-02 20:50:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:50:04,507 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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 21 [2022-11-02 20:50:04,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:04,509 INFO L225 Difference]: With dead ends: 111 [2022-11-02 20:50:04,509 INFO L226 Difference]: Without dead ends: 81 [2022-11-02 20:50:04,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:50:04,512 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:04,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 60 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:50:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-02 20:50:04,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-11-02 20:50:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 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) [2022-11-02 20:50:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-11-02 20:50:04,531 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 21 [2022-11-02 20:50:04,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:04,532 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-11-02 20:50:04,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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) [2022-11-02 20:50:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-11-02 20:50:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:50:04,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:04,534 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:04,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:04,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:04,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:04,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash -922085543, now seen corresponding path program 3 times [2022-11-02 20:50:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:04,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983257442] [2022-11-02 20:50:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:04,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:50:05,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:05,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983257442] [2022-11-02 20:50:05,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983257442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:05,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832825532] [2022-11-02 20:50:05,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:50:05,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:05,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:05,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:05,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:50:05,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-02 20:50:05,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:50:05,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:50:05,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:50:05,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832825532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:05,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:05,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-11-02 20:50:05,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647626130] [2022-11-02 20:50:05,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:05,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:50:05,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:05,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:50:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:50:05,859 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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) [2022-11-02 20:50:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:08,274 INFO L93 Difference]: Finished difference Result 115 states and 156 transitions. [2022-11-02 20:50:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:50:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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 27 [2022-11-02 20:50:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:08,277 INFO L225 Difference]: With dead ends: 115 [2022-11-02 20:50:08,277 INFO L226 Difference]: Without dead ends: 77 [2022-11-02 20:50:08,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:50:08,280 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:08,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 34 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:50:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-02 20:50:08,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 52. [2022-11-02 20:50:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 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) [2022-11-02 20:50:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-11-02 20:50:08,303 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 27 [2022-11-02 20:50:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:08,303 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-11-02 20:50:08,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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) [2022-11-02 20:50:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-11-02 20:50:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:50:08,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:08,308 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 9, 6, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:08,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:08,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:08,513 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash -522566631, now seen corresponding path program 4 times [2022-11-02 20:50:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:08,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932768748] [2022-11-02 20:50:08,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:08,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 173 proven. 57 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-02 20:50:08,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932768748] [2022-11-02 20:50:08,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932768748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551476405] [2022-11-02 20:50:08,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:50:08,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:08,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:08,882 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:08,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:50:08,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:50:08,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:08,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:50:08,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:50:09,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:50:09,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551476405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:09,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:09,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-11-02 20:50:09,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78798871] [2022-11-02 20:50:09,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:09,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:50:09,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:09,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:50:09,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:50:09,822 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 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) [2022-11-02 20:50:29,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:29,185 INFO L93 Difference]: Finished difference Result 1187 states and 1366 transitions. [2022-11-02 20:50:29,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-11-02 20:50:29,186 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 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 51 [2022-11-02 20:50:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:29,190 INFO L225 Difference]: With dead ends: 1187 [2022-11-02 20:50:29,191 INFO L226 Difference]: Without dead ends: 1152 [2022-11-02 20:50:29,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6292 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=3209, Invalid=15151, Unknown=0, NotChecked=0, Total=18360 [2022-11-02 20:50:29,199 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:29,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 101 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-02 20:50:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-11-02 20:50:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 814. [2022-11-02 20:50:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 1.1832718327183271) internal successors, (962), 813 states have internal predecessors, (962), 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) [2022-11-02 20:50:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 962 transitions. [2022-11-02 20:50:29,366 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 962 transitions. Word has length 51 [2022-11-02 20:50:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:29,367 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 962 transitions. [2022-11-02 20:50:29,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 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) [2022-11-02 20:50:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 962 transitions. [2022-11-02 20:50:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-02 20:50:29,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:29,378 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 10, 7, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:29,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-02 20:50:29,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:50:29,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:29,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash 617649339, now seen corresponding path program 5 times [2022-11-02 20:50:29,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:29,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105706034] [2022-11-02 20:50:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:29,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 222 proven. 77 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-02 20:50:30,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:30,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105706034] [2022-11-02 20:50:30,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105706034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:30,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552772437] [2022-11-02 20:50:30,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:50:30,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:30,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:30,040 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:30,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:50:30,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-11-02 20:50:30,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:30,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-02 20:50:30,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 1 proven. 405 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 20:50:30,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 20:50:31,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552772437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:31,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:31,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 35 [2022-11-02 20:50:31,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603206540] [2022-11-02 20:50:31,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:31,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:50:31,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:31,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:50:31,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:50:31,510 INFO L87 Difference]: Start difference. First operand 814 states and 962 transitions. Second operand has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 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) [2022-11-02 20:51:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:15,099 INFO L93 Difference]: Finished difference Result 3471 states and 4041 transitions. [2022-11-02 20:51:15,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-11-02 20:51:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 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 57 [2022-11-02 20:51:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:15,111 INFO L225 Difference]: With dead ends: 3471 [2022-11-02 20:51:15,112 INFO L226 Difference]: Without dead ends: 2831 [2022-11-02 20:51:15,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14301 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=6498, Invalid=31332, Unknown=0, NotChecked=0, Total=37830 [2022-11-02 20:51:15,131 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:15,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 98 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-02 20:51:15,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-11-02 20:51:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 939. [2022-11-02 20:51:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 1.183368869936034) internal successors, (1110), 938 states have internal predecessors, (1110), 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) [2022-11-02 20:51:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1110 transitions. [2022-11-02 20:51:15,333 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1110 transitions. Word has length 57 [2022-11-02 20:51:15,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:15,334 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 1110 transitions. [2022-11-02 20:51:15,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 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) [2022-11-02 20:51:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1110 transitions. [2022-11-02 20:51:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:51:15,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:15,336 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:15,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-02 20:51:15,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:15,542 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:15,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1480398352, now seen corresponding path program 6 times [2022-11-02 20:51:15,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:15,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275232405] [2022-11-02 20:51:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:15,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 126 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-02 20:51:15,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275232405] [2022-11-02 20:51:15,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275232405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916575153] [2022-11-02 20:51:15,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:51:15,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:15,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:15,939 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:15,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:51:16,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-11-02 20:51:16,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:16,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 20:51:16,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 221 proven. 230 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:51:18,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 126 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-02 20:51:20,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916575153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:20,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:20,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 14] total 44 [2022-11-02 20:51:20,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293049408] [2022-11-02 20:51:20,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:20,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 20:51:20,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 20:51:20,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1336, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:51:20,083 INFO L87 Difference]: Start difference. First operand 939 states and 1110 transitions. Second operand has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 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) [2022-11-02 20:52:14,058 WARN L234 SmtUtils]: Spent 6.37s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:52:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:14,065 INFO L93 Difference]: Finished difference Result 1333 states and 1604 transitions. [2022-11-02 20:52:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:52:14,065 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 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 60 [2022-11-02 20:52:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:52:14,068 INFO L225 Difference]: With dead ends: 1333 [2022-11-02 20:52:14,068 INFO L226 Difference]: Without dead ends: 431 [2022-11-02 20:52:14,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=1119, Invalid=2073, Unknown=0, NotChecked=0, Total=3192 [2022-11-02 20:52:14,071 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 276 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:52:14,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 42 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-02 20:52:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-02 20:52:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 103. [2022-11-02 20:52:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 102 states have internal predecessors, (115), 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) [2022-11-02 20:52:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2022-11-02 20:52:14,096 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 60 [2022-11-02 20:52:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:52:14,097 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2022-11-02 20:52:14,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 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) [2022-11-02 20:52:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2022-11-02 20:52:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-02 20:52:14,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:52:14,099 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 21, 11, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:14,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:14,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:14,305 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:52:14,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:14,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2038282736, now seen corresponding path program 7 times [2022-11-02 20:52:14,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:14,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367375969] [2022-11-02 20:52:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:14,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 723 proven. 187 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-11-02 20:52:14,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:14,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367375969] [2022-11-02 20:52:14,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367375969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:14,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811705904] [2022-11-02 20:52:14,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:52:14,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:14,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:14,972 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:15,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d627c96f-112a-4ce2-ab17-7e2b387d65fc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:52:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:15,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-02 20:52:15,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 20:52:15,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 20:52:17,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811705904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:17,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:17,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 25] total 59 [2022-11-02 20:52:17,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722743423] [2022-11-02 20:52:17,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:17,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-02 20:52:17,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-02 20:52:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=2824, Unknown=0, NotChecked=0, Total=3422 [2022-11-02 20:52:17,661 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 59 states, 59 states have (on average 3.406779661016949) internal successors, (201), 59 states have internal predecessors, (201), 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) [2022-11-02 20:53:05,982 WARN L234 SmtUtils]: Spent 21.36s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:53:07,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:54:09,351 WARN L234 SmtUtils]: Spent 27.15s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:54:10,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:54:13,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:54:15,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:54:17,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:54:19,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []