./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.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_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/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_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/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_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --- 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 21:08:39,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:08:39,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:08:39,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:08:39,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:08:39,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:08:39,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:08:39,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:08:39,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:08:39,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:08:39,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:08:39,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:08:39,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:08:39,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:08:39,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:08:39,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:08:39,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:08:39,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:08:39,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:08:39,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:08:39,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:08:39,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:08:39,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:08:39,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:08:39,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:08:39,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:08:39,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:08:39,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:08:39,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:08:39,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:08:39,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:08:39,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:08:39,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:08:39,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:08:39,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:08:39,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:08:39,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:08:39,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:08:39,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:08:39,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:08:39,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:08:39,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:08:39,236 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:08:39,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:08:39,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:08:39,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:08:39,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:08:39,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:08:39,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:08:39,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:08:39,241 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:08:39,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:08:39,243 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:08:39,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:08:39,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:08:39,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:08:39,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:08:39,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:08:39,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:08:39,245 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:08:39,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:08:39,245 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:08:39,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:08:39,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:08:39,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:08:39,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:08:39,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:39,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:08:39,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:08:39,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:08:39,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:08:39,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:08:39,250 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:08:39,250 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:08:39,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:08:39,251 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_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 [2022-11-02 21:08:39,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:08:39,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:08:39,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:08:39,581 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:08:39,582 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:08:39,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-02 21:08:39,661 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/data/6c2374c2c/4e87c0ec33c24b3ca9206f9566554ffa/FLAG36841769e [2022-11-02 21:08:40,248 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:08:40,249 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-02 21:08:40,259 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/data/6c2374c2c/4e87c0ec33c24b3ca9206f9566554ffa/FLAG36841769e [2022-11-02 21:08:40,543 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/data/6c2374c2c/4e87c0ec33c24b3ca9206f9566554ffa [2022-11-02 21:08:40,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:08:40,548 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:08:40,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:40,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:08:40,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:08:40,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:40,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a444639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40, skipping insertion in model container [2022-11-02 21:08:40,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:40,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:08:40,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:08:40,879 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_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-02 21:08:40,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:40,900 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:08:40,936 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_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-02 21:08:40,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:40,959 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:08:40,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40 WrapperNode [2022-11-02 21:08:40,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:40,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:40,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:08:40,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:08:40,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:40,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:41,037 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 315 [2022-11-02 21:08:41,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:41,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:08:41,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:08:41,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:08:41,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:41,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:41,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:41,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:41,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:41,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:41,111 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:41,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:41,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:08:41,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:08:41,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:08:41,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:08:41,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (1/1) ... [2022-11-02 21:08:41,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:41,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:41,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:08:41,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:08:41,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:08:41,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:08:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:08:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:08:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 21:08:41,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 21:08:41,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 21:08:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 21:08:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-02 21:08:41,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-02 21:08:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-02 21:08:41,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-02 21:08:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:08:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 21:08:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 21:08:41,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:08:41,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:08:41,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:08:41,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:08:41,240 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 21:08:41,432 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:08:41,435 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:08:42,102 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:08:42,352 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:08:42,353 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-02 21:08:42,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:42 BoogieIcfgContainer [2022-11-02 21:08:42,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:08:42,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:08:42,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:08:42,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:08:42,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:08:40" (1/3) ... [2022-11-02 21:08:42,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4148c914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:42, skipping insertion in model container [2022-11-02 21:08:42,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:40" (2/3) ... [2022-11-02 21:08:42,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4148c914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:42, skipping insertion in model container [2022-11-02 21:08:42,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:42" (3/3) ... [2022-11-02 21:08:42,374 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2022-11-02 21:08:42,387 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 21:08:42,401 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:08:42,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:08:42,402 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 21:08:42,560 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-02 21:08:42,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 245 transitions, 522 flow [2022-11-02 21:08:42,756 INFO L130 PetriNetUnfolder]: 19/241 cut-off events. [2022-11-02 21:08:42,756 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 21:08:42,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 241 events. 19/241 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 111 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 202. Up to 2 conditions per place. [2022-11-02 21:08:42,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 245 transitions, 522 flow [2022-11-02 21:08:42,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 228 transitions, 480 flow [2022-11-02 21:08:42,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:08:42,820 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;@67d81d90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:08:42,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 21:08:42,922 INFO L130 PetriNetUnfolder]: 19/227 cut-off events. [2022-11-02 21:08:42,922 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 21:08:42,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:42,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:42,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:08:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:42,935 INFO L85 PathProgramCache]: Analyzing trace with hash -430090174, now seen corresponding path program 1 times [2022-11-02 21:08:42,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:42,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499326090] [2022-11-02 21:08:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:42,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:43,648 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 21:08:43,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499326090] [2022-11-02 21:08:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499326090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:43,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:43,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:08:43,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543896327] [2022-11-02 21:08:43,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:43,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:08:43,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:43,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:08:43,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:08:43,725 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 245 [2022-11-02 21:08:43,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 228 transitions, 480 flow. Second operand has 2 states, 2 states have (on average 223.5) internal successors, (447), 2 states have internal predecessors, (447), 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 21:08:43,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:43,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 245 [2022-11-02 21:08:43,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:44,009 INFO L130 PetriNetUnfolder]: 123/530 cut-off events. [2022-11-02 21:08:44,010 INFO L131 PetriNetUnfolder]: For 105/106 co-relation queries the response was YES. [2022-11-02 21:08:44,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 530 events. 123/530 cut-off events. For 105/106 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1709 event pairs, 51 based on Foata normal form. 126/594 useless extension candidates. Maximal degree in co-relation 504. Up to 163 conditions per place. [2022-11-02 21:08:44,023 INFO L137 encePairwiseOnDemand]: 232/245 looper letters, 12 selfloop transitions, 0 changer transitions 7/215 dead transitions. [2022-11-02 21:08:44,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 215 transitions, 478 flow [2022-11-02 21:08:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:08:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 21:08:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 463 transitions. [2022-11-02 21:08:44,054 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9448979591836735 [2022-11-02 21:08:44,056 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 463 transitions. [2022-11-02 21:08:44,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 463 transitions. [2022-11-02 21:08:44,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:44,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 463 transitions. [2022-11-02 21:08:44,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 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 21:08:44,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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 21:08:44,084 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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 21:08:44,087 INFO L175 Difference]: Start difference. First operand has 222 places, 228 transitions, 480 flow. Second operand 2 states and 463 transitions. [2022-11-02 21:08:44,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 215 transitions, 478 flow [2022-11-02 21:08:44,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 215 transitions, 462 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-02 21:08:44,145 INFO L231 Difference]: Finished difference. Result has 215 places, 208 transitions, 424 flow [2022-11-02 21:08:44,148 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=424, PETRI_PLACES=215, PETRI_TRANSITIONS=208} [2022-11-02 21:08:44,152 INFO L287 CegarLoopForPetriNet]: 222 programPoint places, -7 predicate places. [2022-11-02 21:08:44,153 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 208 transitions, 424 flow [2022-11-02 21:08:44,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 223.5) internal successors, (447), 2 states have internal predecessors, (447), 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 21:08:44,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:44,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:44,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:08:44,155 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:08:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash 290571139, now seen corresponding path program 1 times [2022-11-02 21:08:44,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:44,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580204929] [2022-11-02 21:08:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:44,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:45,641 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 21:08:45,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:45,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580204929] [2022-11-02 21:08:45,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580204929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:45,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:45,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:08:45,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584843394] [2022-11-02 21:08:45,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:45,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:08:45,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:45,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:08:45,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:08:45,666 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 245 [2022-11-02 21:08:45,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 208 transitions, 424 flow. Second operand has 8 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 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 21:08:45,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:45,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 245 [2022-11-02 21:08:45,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:46,333 INFO L130 PetriNetUnfolder]: 417/981 cut-off events. [2022-11-02 21:08:46,334 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-02 21:08:46,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1658 conditions, 981 events. 417/981 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4324 event pairs, 71 based on Foata normal form. 0/875 useless extension candidates. Maximal degree in co-relation 1655. Up to 385 conditions per place. [2022-11-02 21:08:46,349 INFO L137 encePairwiseOnDemand]: 238/245 looper letters, 61 selfloop transitions, 6 changer transitions 0/226 dead transitions. [2022-11-02 21:08:46,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 226 transitions, 600 flow [2022-11-02 21:08:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:08:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 21:08:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1293 transitions. [2022-11-02 21:08:46,355 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.753935860058309 [2022-11-02 21:08:46,355 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1293 transitions. [2022-11-02 21:08:46,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1293 transitions. [2022-11-02 21:08:46,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:46,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1293 transitions. [2022-11-02 21:08:46,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.71428571428572) internal successors, (1293), 7 states have internal predecessors, (1293), 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 21:08:46,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 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 21:08:46,370 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 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 21:08:46,370 INFO L175 Difference]: Start difference. First operand has 215 places, 208 transitions, 424 flow. Second operand 7 states and 1293 transitions. [2022-11-02 21:08:46,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 226 transitions, 600 flow [2022-11-02 21:08:46,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 226 transitions, 600 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 21:08:46,386 INFO L231 Difference]: Finished difference. Result has 215 places, 209 transitions, 444 flow [2022-11-02 21:08:46,386 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=444, PETRI_PLACES=215, PETRI_TRANSITIONS=209} [2022-11-02 21:08:46,387 INFO L287 CegarLoopForPetriNet]: 222 programPoint places, -7 predicate places. [2022-11-02 21:08:46,388 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 209 transitions, 444 flow [2022-11-02 21:08:46,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 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 21:08:46,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:46,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:46,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:08:46,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:08:46,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:46,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1563560044, now seen corresponding path program 1 times [2022-11-02 21:08:46,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:46,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513010714] [2022-11-02 21:08:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:46,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:47,320 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 21:08:47,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:47,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513010714] [2022-11-02 21:08:47,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513010714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:47,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225894258] [2022-11-02 21:08:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:47,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:47,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:47,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:47,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:08:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:47,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:08:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:48,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:48,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225894258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:48,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:08:48,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-11-02 21:08:48,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852504499] [2022-11-02 21:08:48,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:48,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:08:48,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:48,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:08:48,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:48,048 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 245 [2022-11-02 21:08:48,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 209 transitions, 444 flow. Second operand has 6 states, 6 states have (on average 197.5) internal successors, (1185), 6 states have internal predecessors, (1185), 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 21:08:48,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:48,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 245 [2022-11-02 21:08:48,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:48,419 INFO L130 PetriNetUnfolder]: 116/628 cut-off events. [2022-11-02 21:08:48,419 INFO L131 PetriNetUnfolder]: For 62/92 co-relation queries the response was YES. [2022-11-02 21:08:48,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 628 events. 116/628 cut-off events. For 62/92 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2081 event pairs, 54 based on Foata normal form. 37/614 useless extension candidates. Maximal degree in co-relation 915. Up to 160 conditions per place. [2022-11-02 21:08:48,427 INFO L137 encePairwiseOnDemand]: 234/245 looper letters, 35 selfloop transitions, 8 changer transitions 19/232 dead transitions. [2022-11-02 21:08:48,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 232 transitions, 618 flow [2022-11-02 21:08:48,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:08:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 21:08:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1800 transitions. [2022-11-02 21:08:48,439 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8163265306122449 [2022-11-02 21:08:48,439 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1800 transitions. [2022-11-02 21:08:48,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1800 transitions. [2022-11-02 21:08:48,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:48,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1800 transitions. [2022-11-02 21:08:48,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.0) internal successors, (1800), 9 states have internal predecessors, (1800), 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 21:08:48,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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 21:08:48,454 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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 21:08:48,454 INFO L175 Difference]: Start difference. First operand has 215 places, 209 transitions, 444 flow. Second operand 9 states and 1800 transitions. [2022-11-02 21:08:48,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 232 transitions, 618 flow [2022-11-02 21:08:48,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 232 transitions, 608 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-02 21:08:48,461 INFO L231 Difference]: Finished difference. Result has 220 places, 210 transitions, 464 flow [2022-11-02 21:08:48,462 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=464, PETRI_PLACES=220, PETRI_TRANSITIONS=210} [2022-11-02 21:08:48,463 INFO L287 CegarLoopForPetriNet]: 222 programPoint places, -2 predicate places. [2022-11-02 21:08:48,463 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 210 transitions, 464 flow [2022-11-02 21:08:48,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 197.5) internal successors, (1185), 6 states have internal predecessors, (1185), 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 21:08:48,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:48,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:48,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:48,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:48,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:08:48,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:48,679 INFO L85 PathProgramCache]: Analyzing trace with hash 210554049, now seen corresponding path program 1 times [2022-11-02 21:08:48,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:48,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357944655] [2022-11-02 21:08:48,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:48,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:08:49,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:49,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357944655] [2022-11-02 21:08:49,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357944655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:49,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684293582] [2022-11-02 21:08:49,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:49,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:49,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:49,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:49,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:08:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:49,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:08:49,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:08:50,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:08:50,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684293582] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:50,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:08:50,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 10] total 21 [2022-11-02 21:08:50,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197357051] [2022-11-02 21:08:50,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:50,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:08:50,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:50,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:08:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:08:50,995 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 245 [2022-11-02 21:08:50,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 210 transitions, 464 flow. Second operand has 9 states, 9 states have (on average 174.55555555555554) internal successors, (1571), 9 states have internal predecessors, (1571), 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 21:08:50,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:50,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 245 [2022-11-02 21:08:50,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:52,112 INFO L130 PetriNetUnfolder]: 1253/2658 cut-off events. [2022-11-02 21:08:52,112 INFO L131 PetriNetUnfolder]: For 327/327 co-relation queries the response was YES. [2022-11-02 21:08:52,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4877 conditions, 2658 events. 1253/2658 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16552 event pairs, 152 based on Foata normal form. 0/2345 useless extension candidates. Maximal degree in co-relation 4870. Up to 413 conditions per place. [2022-11-02 21:08:52,145 INFO L137 encePairwiseOnDemand]: 234/245 looper letters, 107 selfloop transitions, 20 changer transitions 0/281 dead transitions. [2022-11-02 21:08:52,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 281 transitions, 909 flow [2022-11-02 21:08:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:08:52,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 21:08:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2154 transitions. [2022-11-02 21:08:52,151 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7326530612244898 [2022-11-02 21:08:52,151 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2154 transitions. [2022-11-02 21:08:52,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2154 transitions. [2022-11-02 21:08:52,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:52,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2154 transitions. [2022-11-02 21:08:52,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 179.5) internal successors, (2154), 12 states have internal predecessors, (2154), 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 21:08:52,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 245.0) internal successors, (3185), 13 states have internal predecessors, (3185), 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 21:08:52,167 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 245.0) internal successors, (3185), 13 states have internal predecessors, (3185), 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 21:08:52,167 INFO L175 Difference]: Start difference. First operand has 220 places, 210 transitions, 464 flow. Second operand 12 states and 2154 transitions. [2022-11-02 21:08:52,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 281 transitions, 909 flow [2022-11-02 21:08:52,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 281 transitions, 895 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-02 21:08:52,176 INFO L231 Difference]: Finished difference. Result has 232 places, 226 transitions, 597 flow [2022-11-02 21:08:52,177 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=597, PETRI_PLACES=232, PETRI_TRANSITIONS=226} [2022-11-02 21:08:52,179 INFO L287 CegarLoopForPetriNet]: 222 programPoint places, 10 predicate places. [2022-11-02 21:08:52,179 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 226 transitions, 597 flow [2022-11-02 21:08:52,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 174.55555555555554) internal successors, (1571), 9 states have internal predecessors, (1571), 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 21:08:52,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:52,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:52,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:52,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:52,401 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:08:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:52,402 INFO L85 PathProgramCache]: Analyzing trace with hash 608562805, now seen corresponding path program 2 times [2022-11-02 21:08:52,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:52,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467169282] [2022-11-02 21:08:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:52,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:08:53,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:53,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467169282] [2022-11-02 21:08:53,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467169282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:53,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:53,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:08:53,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769771205] [2022-11-02 21:08:53,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:53,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:08:53,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:53,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:08:53,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:53,175 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 245 [2022-11-02 21:08:53,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 226 transitions, 597 flow. Second operand has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:08:53,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:53,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 245 [2022-11-02 21:08:53,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:54,236 INFO L130 PetriNetUnfolder]: 1646/3043 cut-off events. [2022-11-02 21:08:54,236 INFO L131 PetriNetUnfolder]: For 2178/2178 co-relation queries the response was YES. [2022-11-02 21:08:54,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7642 conditions, 3043 events. 1646/3043 cut-off events. For 2178/2178 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18105 event pairs, 162 based on Foata normal form. 42/2943 useless extension candidates. Maximal degree in co-relation 7627. Up to 893 conditions per place. [2022-11-02 21:08:54,283 INFO L137 encePairwiseOnDemand]: 238/245 looper letters, 80 selfloop transitions, 27 changer transitions 0/292 dead transitions. [2022-11-02 21:08:54,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 292 transitions, 1124 flow [2022-11-02 21:08:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:08:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 21:08:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1520 transitions. [2022-11-02 21:08:54,288 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8862973760932945 [2022-11-02 21:08:54,289 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1520 transitions. [2022-11-02 21:08:54,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1520 transitions. [2022-11-02 21:08:54,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:54,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1520 transitions. [2022-11-02 21:08:54,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 217.14285714285714) internal successors, (1520), 7 states have internal predecessors, (1520), 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 21:08:54,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 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 21:08:54,302 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 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 21:08:54,303 INFO L175 Difference]: Start difference. First operand has 232 places, 226 transitions, 597 flow. Second operand 7 states and 1520 transitions. [2022-11-02 21:08:54,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 292 transitions, 1124 flow [2022-11-02 21:08:54,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 292 transitions, 1085 flow, removed 16 selfloop flow, removed 4 redundant places. [2022-11-02 21:08:54,338 INFO L231 Difference]: Finished difference. Result has 238 places, 241 transitions, 776 flow [2022-11-02 21:08:54,339 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=776, PETRI_PLACES=238, PETRI_TRANSITIONS=241} [2022-11-02 21:08:54,342 INFO L287 CegarLoopForPetriNet]: 222 programPoint places, 16 predicate places. [2022-11-02 21:08:54,343 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 241 transitions, 776 flow [2022-11-02 21:08:54,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:08:54,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:54,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:54,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:08:54,344 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:08:54,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:54,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1323704521, now seen corresponding path program 3 times [2022-11-02 21:08:54,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:54,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098670965] [2022-11-02 21:08:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:54,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:08:55,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:55,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098670965] [2022-11-02 21:08:55,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098670965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:55,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:55,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:08:55,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362189962] [2022-11-02 21:08:55,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:55,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:08:55,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:55,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:08:55,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:55,131 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 245 [2022-11-02 21:08:55,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 241 transitions, 776 flow. Second operand has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:08:55,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:55,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 245 [2022-11-02 21:08:55,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:56,953 INFO L130 PetriNetUnfolder]: 2713/5242 cut-off events. [2022-11-02 21:08:56,953 INFO L131 PetriNetUnfolder]: For 7935/7997 co-relation queries the response was YES. [2022-11-02 21:08:56,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14172 conditions, 5242 events. 2713/5242 cut-off events. For 7935/7997 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 37417 event pairs, 299 based on Foata normal form. 61/4977 useless extension candidates. Maximal degree in co-relation 14154. Up to 1223 conditions per place. [2022-11-02 21:08:57,035 INFO L137 encePairwiseOnDemand]: 236/245 looper letters, 85 selfloop transitions, 44 changer transitions 0/314 dead transitions. [2022-11-02 21:08:57,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 314 transitions, 1489 flow [2022-11-02 21:08:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:08:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 21:08:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1313 transitions. [2022-11-02 21:08:57,040 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8931972789115646 [2022-11-02 21:08:57,040 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1313 transitions. [2022-11-02 21:08:57,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1313 transitions. [2022-11-02 21:08:57,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:57,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1313 transitions. [2022-11-02 21:08:57,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.83333333333334) internal successors, (1313), 6 states have internal predecessors, (1313), 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 21:08:57,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 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 21:08:57,050 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 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 21:08:57,050 INFO L175 Difference]: Start difference. First operand has 238 places, 241 transitions, 776 flow. Second operand 6 states and 1313 transitions. [2022-11-02 21:08:57,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 314 transitions, 1489 flow [2022-11-02 21:08:57,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 314 transitions, 1460 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-02 21:08:57,109 INFO L231 Difference]: Finished difference. Result has 246 places, 268 transitions, 1188 flow [2022-11-02 21:08:57,109 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1188, PETRI_PLACES=246, PETRI_TRANSITIONS=268} [2022-11-02 21:08:57,113 INFO L287 CegarLoopForPetriNet]: 222 programPoint places, 24 predicate places. [2022-11-02 21:08:57,113 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 268 transitions, 1188 flow [2022-11-02 21:08:57,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:08:57,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:57,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:57,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 21:08:57,115 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:08:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:57,116 INFO L85 PathProgramCache]: Analyzing trace with hash -651985971, now seen corresponding path program 4 times [2022-11-02 21:08:57,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:57,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355559719] [2022-11-02 21:08:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:57,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:08:57,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:57,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355559719] [2022-11-02 21:08:57,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355559719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:57,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:57,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:08:57,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788133365] [2022-11-02 21:08:57,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:57,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:08:57,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:57,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:08:57,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:57,898 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 245 [2022-11-02 21:08:57,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 268 transitions, 1188 flow. Second operand has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:08:57,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:57,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 245 [2022-11-02 21:08:57,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:01,189 INFO L130 PetriNetUnfolder]: 4235/8935 cut-off events. [2022-11-02 21:09:01,190 INFO L131 PetriNetUnfolder]: For 20609/20682 co-relation queries the response was YES. [2022-11-02 21:09:01,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24702 conditions, 8935 events. 4235/8935 cut-off events. For 20609/20682 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 77690 event pairs, 747 based on Foata normal form. 42/8451 useless extension candidates. Maximal degree in co-relation 24679. Up to 1800 conditions per place. [2022-11-02 21:09:01,365 INFO L137 encePairwiseOnDemand]: 238/245 looper letters, 105 selfloop transitions, 57 changer transitions 0/347 dead transitions. [2022-11-02 21:09:01,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 347 transitions, 2139 flow [2022-11-02 21:09:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:09:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 21:09:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1312 transitions. [2022-11-02 21:09:01,371 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8925170068027211 [2022-11-02 21:09:01,371 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1312 transitions. [2022-11-02 21:09:01,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1312 transitions. [2022-11-02 21:09:01,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:01,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1312 transitions. [2022-11-02 21:09:01,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.66666666666666) internal successors, (1312), 6 states have internal predecessors, (1312), 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 21:09:01,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 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 21:09:01,463 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 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 21:09:01,463 INFO L175 Difference]: Start difference. First operand has 246 places, 268 transitions, 1188 flow. Second operand 6 states and 1312 transitions. [2022-11-02 21:09:01,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 347 transitions, 2139 flow [2022-11-02 21:09:01,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 347 transitions, 2099 flow, removed 20 selfloop flow, removed 0 redundant places. [2022-11-02 21:09:01,585 INFO L231 Difference]: Finished difference. Result has 255 places, 303 transitions, 1861 flow [2022-11-02 21:09:01,586 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1861, PETRI_PLACES=255, PETRI_TRANSITIONS=303} [2022-11-02 21:09:01,587 INFO L287 CegarLoopForPetriNet]: 222 programPoint places, 33 predicate places. [2022-11-02 21:09:01,592 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 303 transitions, 1861 flow [2022-11-02 21:09:01,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:09:01,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:01,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:01,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 21:09:01,594 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:09:01,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:01,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1347028581, now seen corresponding path program 5 times [2022-11-02 21:09:01,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:01,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124978444] [2022-11-02 21:09:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:01,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:09:02,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:02,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124978444] [2022-11-02 21:09:02,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124978444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:02,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:02,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:09:02,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232644297] [2022-11-02 21:09:02,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:02,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:09:02,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:09:02,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:02,412 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 245 [2022-11-02 21:09:02,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 303 transitions, 1861 flow. Second operand has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:09:02,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:02,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 245 [2022-11-02 21:09:02,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:04,999 INFO L130 PetriNetUnfolder]: 4148/7548 cut-off events. [2022-11-02 21:09:04,999 INFO L131 PetriNetUnfolder]: For 25771/25886 co-relation queries the response was YES. [2022-11-02 21:09:05,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25300 conditions, 7548 events. 4148/7548 cut-off events. For 25771/25886 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55622 event pairs, 428 based on Foata normal form. 55/7273 useless extension candidates. Maximal degree in co-relation 25272. Up to 1973 conditions per place. [2022-11-02 21:09:05,151 INFO L137 encePairwiseOnDemand]: 237/245 looper letters, 96 selfloop transitions, 65 changer transitions 0/346 dead transitions. [2022-11-02 21:09:05,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 346 transitions, 2519 flow [2022-11-02 21:09:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:09:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 21:09:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1091 transitions. [2022-11-02 21:09:05,156 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8906122448979592 [2022-11-02 21:09:05,156 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1091 transitions. [2022-11-02 21:09:05,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1091 transitions. [2022-11-02 21:09:05,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:05,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1091 transitions. [2022-11-02 21:09:05,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 218.2) internal successors, (1091), 5 states have internal predecessors, (1091), 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 21:09:05,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 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 21:09:05,167 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 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 21:09:05,167 INFO L175 Difference]: Start difference. First operand has 255 places, 303 transitions, 1861 flow. Second operand 5 states and 1091 transitions. [2022-11-02 21:09:05,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 346 transitions, 2519 flow [2022-11-02 21:09:05,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 346 transitions, 2503 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-11-02 21:09:05,327 INFO L231 Difference]: Finished difference. Result has 262 places, 314 transitions, 2240 flow [2022-11-02 21:09:05,328 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2240, PETRI_PLACES=262, PETRI_TRANSITIONS=314} [2022-11-02 21:09:05,331 INFO L287 CegarLoopForPetriNet]: 222 programPoint places, 40 predicate places. [2022-11-02 21:09:05,331 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 314 transitions, 2240 flow [2022-11-02 21:09:05,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:09:05,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:05,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:05,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 21:09:05,333 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:09:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:05,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1416159337, now seen corresponding path program 6 times [2022-11-02 21:09:05,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:05,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685008101] [2022-11-02 21:09:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:05,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:09:06,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:06,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685008101] [2022-11-02 21:09:06,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685008101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:06,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:06,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:09:06,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098104679] [2022-11-02 21:09:06,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:06,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:09:06,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:06,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:09:06,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:06,048 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 245 [2022-11-02 21:09:06,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 314 transitions, 2240 flow. Second operand has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:09:06,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:06,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 245 [2022-11-02 21:09:06,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:09,008 INFO L130 PetriNetUnfolder]: 3936/7455 cut-off events. [2022-11-02 21:09:09,008 INFO L131 PetriNetUnfolder]: For 33163/33223 co-relation queries the response was YES. [2022-11-02 21:09:09,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26921 conditions, 7455 events. 3936/7455 cut-off events. For 33163/33223 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 57201 event pairs, 1157 based on Foata normal form. 24/7223 useless extension candidates. Maximal degree in co-relation 26889. Up to 4695 conditions per place. [2022-11-02 21:09:09,249 INFO L137 encePairwiseOnDemand]: 240/245 looper letters, 145 selfloop transitions, 13 changer transitions 0/343 dead transitions. [2022-11-02 21:09:09,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 343 transitions, 2785 flow [2022-11-02 21:09:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:09:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 21:09:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1088 transitions. [2022-11-02 21:09:09,253 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8881632653061224 [2022-11-02 21:09:09,253 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1088 transitions. [2022-11-02 21:09:09,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1088 transitions. [2022-11-02 21:09:09,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:09,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1088 transitions. [2022-11-02 21:09:09,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 217.6) internal successors, (1088), 5 states have internal predecessors, (1088), 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 21:09:09,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 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 21:09:09,261 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 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 21:09:09,262 INFO L175 Difference]: Start difference. First operand has 262 places, 314 transitions, 2240 flow. Second operand 5 states and 1088 transitions. [2022-11-02 21:09:09,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 343 transitions, 2785 flow [2022-11-02 21:09:09,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 343 transitions, 2731 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-02 21:09:09,453 INFO L231 Difference]: Finished difference. Result has 267 places, 318 transitions, 2306 flow [2022-11-02 21:09:09,454 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2306, PETRI_PLACES=267, PETRI_TRANSITIONS=318} [2022-11-02 21:09:09,455 INFO L287 CegarLoopForPetriNet]: 222 programPoint places, 45 predicate places. [2022-11-02 21:09:09,456 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 318 transitions, 2306 flow [2022-11-02 21:09:09,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:09:09,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:09,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:09,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 21:09:09,468 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:09:09,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:09,469 INFO L85 PathProgramCache]: Analyzing trace with hash 416543259, now seen corresponding path program 7 times [2022-11-02 21:09:09,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:09,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835426357] [2022-11-02 21:09:09,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:09,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:09:10,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:10,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835426357] [2022-11-02 21:09:10,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835426357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:10,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:10,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:09:10,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857730068] [2022-11-02 21:09:10,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:10,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:09:10,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:09:10,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:10,082 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 245 [2022-11-02 21:09:10,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 318 transitions, 2306 flow. Second operand has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:09:10,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:10,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 245 [2022-11-02 21:09:10,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:12,346 INFO L130 PetriNetUnfolder]: 3987/7541 cut-off events. [2022-11-02 21:09:12,346 INFO L131 PetriNetUnfolder]: For 35933/36069 co-relation queries the response was YES. [2022-11-02 21:09:12,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26692 conditions, 7541 events. 3987/7541 cut-off events. For 35933/36069 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 58245 event pairs, 346 based on Foata normal form. 50/7316 useless extension candidates. Maximal degree in co-relation 26658. Up to 1814 conditions per place. [2022-11-02 21:09:12,476 INFO L137 encePairwiseOnDemand]: 238/245 looper letters, 126 selfloop transitions, 43 changer transitions 0/354 dead transitions. [2022-11-02 21:09:12,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 354 transitions, 2883 flow [2022-11-02 21:09:12,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:09:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 21:09:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1092 transitions. [2022-11-02 21:09:12,481 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8914285714285715 [2022-11-02 21:09:12,482 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1092 transitions. [2022-11-02 21:09:12,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1092 transitions. [2022-11-02 21:09:12,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:12,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1092 transitions. [2022-11-02 21:09:12,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 218.4) internal successors, (1092), 5 states have internal predecessors, (1092), 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 21:09:12,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 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 21:09:12,491 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 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 21:09:12,492 INFO L175 Difference]: Start difference. First operand has 267 places, 318 transitions, 2306 flow. Second operand 5 states and 1092 transitions. [2022-11-02 21:09:12,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 354 transitions, 2883 flow [2022-11-02 21:09:12,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 354 transitions, 2856 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-02 21:09:12,705 INFO L231 Difference]: Finished difference. Result has 271 places, 321 transitions, 2468 flow [2022-11-02 21:09:12,706 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2468, PETRI_PLACES=271, PETRI_TRANSITIONS=321} [2022-11-02 21:09:12,706 INFO L287 CegarLoopForPetriNet]: 222 programPoint places, 49 predicate places. [2022-11-02 21:09:12,707 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 321 transitions, 2468 flow [2022-11-02 21:09:12,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 21:09:12,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:12,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:12,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 21:09:12,709 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:09:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:12,710 INFO L85 PathProgramCache]: Analyzing trace with hash 533614172, now seen corresponding path program 1 times [2022-11-02 21:09:12,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:12,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244790703] [2022-11-02 21:09:12,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:12,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:15,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:15,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244790703] [2022-11-02 21:09:15,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244790703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:15,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193607353] [2022-11-02 21:09:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:15,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:15,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:15,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:15,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:09:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:15,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 21:09:15,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:17,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 21:09:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:17,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:18,218 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:09:18,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2022-11-02 21:09:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:19,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193607353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:19,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:19,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 16] total 47 [2022-11-02 21:09:19,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081519100] [2022-11-02 21:09:19,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:19,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-02 21:09:19,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-02 21:09:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 21:09:19,655 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 245 [2022-11-02 21:09:19,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 321 transitions, 2468 flow. Second operand has 47 states, 47 states have (on average 118.57446808510639) internal successors, (5573), 47 states have internal predecessors, (5573), 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 21:09:19,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:19,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 245 [2022-11-02 21:09:19,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:54,147 INFO L130 PetriNetUnfolder]: 50921/90308 cut-off events. [2022-11-02 21:09:54,148 INFO L131 PetriNetUnfolder]: For 626723/637326 co-relation queries the response was YES. [2022-11-02 21:09:54,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366314 conditions, 90308 events. 50921/90308 cut-off events. For 626723/637326 co-relation queries the response was YES. Maximal size of possible extension queue 4583. Compared 917026 event pairs, 3450 based on Foata normal form. 3366/90884 useless extension candidates. Maximal degree in co-relation 366278. Up to 19118 conditions per place. [2022-11-02 21:09:55,705 INFO L137 encePairwiseOnDemand]: 211/245 looper letters, 770 selfloop transitions, 179 changer transitions 23/1091 dead transitions. [2022-11-02 21:09:55,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1091 transitions, 13714 flow [2022-11-02 21:09:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 21:09:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-02 21:09:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 5884 transitions. [2022-11-02 21:09:55,729 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5003401360544217 [2022-11-02 21:09:55,729 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 5884 transitions. [2022-11-02 21:09:55,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 5884 transitions. [2022-11-02 21:09:55,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:55,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 5884 transitions. [2022-11-02 21:09:55,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 122.58333333333333) internal successors, (5884), 48 states have internal predecessors, (5884), 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 21:09:55,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 245.0) internal successors, (12005), 49 states have internal predecessors, (12005), 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 21:09:55,787 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 245.0) internal successors, (12005), 49 states have internal predecessors, (12005), 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 21:09:55,787 INFO L175 Difference]: Start difference. First operand has 271 places, 321 transitions, 2468 flow. Second operand 48 states and 5884 transitions. [2022-11-02 21:09:55,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1091 transitions, 13714 flow [2022-11-02 21:10:08,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1091 transitions, 13421 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-02 21:10:08,936 INFO L231 Difference]: Finished difference. Result has 344 places, 510 transitions, 6000 flow [2022-11-02 21:10:08,937 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6000, PETRI_PLACES=344, PETRI_TRANSITIONS=510} [2022-11-02 21:10:08,937 INFO L287 CegarLoopForPetriNet]: 222 programPoint places, 122 predicate places. [2022-11-02 21:10:08,938 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 510 transitions, 6000 flow [2022-11-02 21:10:08,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 118.57446808510639) internal successors, (5573), 47 states have internal predecessors, (5573), 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 21:10:08,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:10:08,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:10:08,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:09,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 21:10:09,152 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 21:10:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:09,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2045197552, now seen corresponding path program 2 times [2022-11-02 21:10:09,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:10:09,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314532837] [2022-11-02 21:10:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:09,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:10:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:12,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:10:12,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314532837] [2022-11-02 21:10:12,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314532837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:12,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527016334] [2022-11-02 21:10:12,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:10:12,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:12,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:10:12,429 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:10:12,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1fc0f6-8a9c-4665-80a2-eed702bc2df3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:10:12,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:10:12,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:10:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-02 21:10:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:12,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 21:10:13,746 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 21:10:13,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 21:10:14,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 21:10:15,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 21:10:15,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:10:15,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 21:10:16,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:10:16,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 21:10:16,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 21:10:16,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-02 21:10:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:16,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:20,751 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:10:20,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2022-11-02 21:10:20,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1371 treesize of output 1331 [2022-11-02 21:10:20,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1310 treesize of output 1118 [2022-11-02 21:10:20,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1118 treesize of output 1022 [2022-11-02 21:10:20,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1035 treesize of output 1005 [2022-11-02 21:10:20,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 998 treesize of output 950