./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:45:37,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:45:37,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:45:37,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:45:37,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:45:37,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:45:37,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:45:37,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:45:37,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:45:37,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:45:37,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:45:37,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:45:37,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:45:37,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:45:37,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:45:37,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:45:37,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:45:37,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:45:37,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:45:37,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:45:37,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:45:37,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:45:37,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:45:37,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:45:37,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:45:37,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:45:37,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:45:37,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:45:37,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:45:37,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:45:37,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:45:37,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:45:37,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:45:37,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:45:37,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:45:37,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:45:37,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:45:37,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:45:37,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:45:37,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:45:37,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:45:37,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:45:37,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:45:37,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:45:37,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:45:37,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:45:37,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:45:37,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:45:37,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:45:37,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:45:37,189 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:45:37,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:45:37,190 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:45:37,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:45:37,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:45:37,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:45:37,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:45:37,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:45:37,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:45:37,192 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:45:37,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:45:37,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:45:37,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:45:37,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:45:37,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:45:37,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:45:37,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:45:37,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:45:37,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:45:37,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:45:37,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:45:37,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:45:37,195 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:45:37,195 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:45:37,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:45:37,196 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_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2022-11-18 18:45:37,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:45:37,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:45:37,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:45:37,542 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:45:37,543 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:45:37,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/stack_longest-1.i [2022-11-18 18:45:37,634 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/data/c98528c01/6211250afd4d44379eec3d8f1f62b1c5/FLAGeee82d4f6 [2022-11-18 18:45:38,292 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:45:38,293 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/sv-benchmarks/c/pthread/stack_longest-1.i [2022-11-18 18:45:38,309 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/data/c98528c01/6211250afd4d44379eec3d8f1f62b1c5/FLAGeee82d4f6 [2022-11-18 18:45:38,569 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/data/c98528c01/6211250afd4d44379eec3d8f1f62b1c5 [2022-11-18 18:45:38,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:45:38,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:45:38,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:45:38,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:45:38,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:45:38,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:45:38" (1/1) ... [2022-11-18 18:45:38,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f609907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:38, skipping insertion in model container [2022-11-18 18:45:38,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:45:38" (1/1) ... [2022-11-18 18:45:38,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:45:38,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:45:39,165 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-11-18 18:45:39,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:45:39,225 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:45:39,267 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-11-18 18:45:39,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:45:39,332 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:45:39,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39 WrapperNode [2022-11-18 18:45:39,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:45:39,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:45:39,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:45:39,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:45:39,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (1/1) ... [2022-11-18 18:45:39,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (1/1) ... [2022-11-18 18:45:39,416 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-11-18 18:45:39,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:45:39,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:45:39,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:45:39,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:45:39,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (1/1) ... [2022-11-18 18:45:39,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (1/1) ... [2022-11-18 18:45:39,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (1/1) ... [2022-11-18 18:45:39,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (1/1) ... [2022-11-18 18:45:39,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (1/1) ... [2022-11-18 18:45:39,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (1/1) ... [2022-11-18 18:45:39,473 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (1/1) ... [2022-11-18 18:45:39,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (1/1) ... [2022-11-18 18:45:39,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:45:39,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:45:39,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:45:39,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:45:39,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (1/1) ... [2022-11-18 18:45:39,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:45:39,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:45:39,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:45:39,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:45:39,588 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 18:45:39,588 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 18:45:39,589 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 18:45:39,589 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 18:45:39,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:45:39,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:45:39,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:45:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:45:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 18:45:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:45:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:45:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:45:39,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:45:39,592 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:45:39,841 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:45:39,843 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:45:40,196 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:45:40,205 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:45:40,205 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:45:40,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:45:40 BoogieIcfgContainer [2022-11-18 18:45:40,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:45:40,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:45:40,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:45:40,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:45:40,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:45:38" (1/3) ... [2022-11-18 18:45:40,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f29224e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:45:40, skipping insertion in model container [2022-11-18 18:45:40,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:45:39" (2/3) ... [2022-11-18 18:45:40,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f29224e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:45:40, skipping insertion in model container [2022-11-18 18:45:40,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:45:40" (3/3) ... [2022-11-18 18:45:40,246 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2022-11-18 18:45:40,255 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:45:40,275 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:45:40,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 18:45:40,275 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:45:40,382 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:45:40,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 179 transitions, 374 flow [2022-11-18 18:45:40,587 INFO L130 PetriNetUnfolder]: 10/177 cut-off events. [2022-11-18 18:45:40,587 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:45:40,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 10/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 438 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-11-18 18:45:40,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 179 transitions, 374 flow [2022-11-18 18:45:40,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 167 transitions, 343 flow [2022-11-18 18:45:40,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:45:40,639 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;@78990f53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:45:40,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-18 18:45:40,701 INFO L130 PetriNetUnfolder]: 4/130 cut-off events. [2022-11-18 18:45:40,702 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 18:45:40,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:40,703 INFO L209 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] [2022-11-18 18:45:40,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:45:40,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:40,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1422919437, now seen corresponding path program 1 times [2022-11-18 18:45:40,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:40,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009259803] [2022-11-18 18:45:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:40,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:41,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009259803] [2022-11-18 18:45:41,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009259803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:41,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:41,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:45:41,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728031565] [2022-11-18 18:45:41,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:41,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:45:41,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:45:41,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:45:41,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 179 [2022-11-18 18:45:41,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 167 transitions, 343 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:41,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:41,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 179 [2022-11-18 18:45:41,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:41,566 INFO L130 PetriNetUnfolder]: 91/890 cut-off events. [2022-11-18 18:45:41,567 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-18 18:45:41,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 890 events. 91/890 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5289 event pairs, 15 based on Foata normal form. 61/878 useless extension candidates. Maximal degree in co-relation 903. Up to 96 conditions per place. [2022-11-18 18:45:41,581 INFO L137 encePairwiseOnDemand]: 170/179 looper letters, 19 selfloop transitions, 3 changer transitions 0/167 dead transitions. [2022-11-18 18:45:41,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 167 transitions, 393 flow [2022-11-18 18:45:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:45:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:45:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2022-11-18 18:45:41,608 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9422718808193669 [2022-11-18 18:45:41,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2022-11-18 18:45:41,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2022-11-18 18:45:41,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:41,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2022-11-18 18:45:41,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:41,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:41,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:41,639 INFO L175 Difference]: Start difference. First operand has 164 places, 167 transitions, 343 flow. Second operand 3 states and 506 transitions. [2022-11-18 18:45:41,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 167 transitions, 393 flow [2022-11-18 18:45:41,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 167 transitions, 385 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 18:45:41,657 INFO L231 Difference]: Finished difference. Result has 160 places, 160 transitions, 339 flow [2022-11-18 18:45:41,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=160, PETRI_TRANSITIONS=160} [2022-11-18 18:45:41,665 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, -4 predicate places. [2022-11-18 18:45:41,666 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 160 transitions, 339 flow [2022-11-18 18:45:41,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:41,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:41,667 INFO L209 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] [2022-11-18 18:45:41,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:45:41,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:45:41,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:41,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1122638211, now seen corresponding path program 1 times [2022-11-18 18:45:41,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:41,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655717165] [2022-11-18 18:45:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:41,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:41,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:41,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655717165] [2022-11-18 18:45:41,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655717165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:41,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:41,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:45:41,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898363106] [2022-11-18 18:45:41,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:41,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:45:41,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:41,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:45:41,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:45:41,936 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 179 [2022-11-18 18:45:41,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 160 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:41,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:41,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 179 [2022-11-18 18:45:41,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:42,032 INFO L130 PetriNetUnfolder]: 21/419 cut-off events. [2022-11-18 18:45:42,032 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 18:45:42,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 419 events. 21/419 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1380 event pairs, 4 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 376. Up to 16 conditions per place. [2022-11-18 18:45:42,036 INFO L137 encePairwiseOnDemand]: 176/179 looper letters, 9 selfloop transitions, 2 changer transitions 0/163 dead transitions. [2022-11-18 18:45:42,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 163 transitions, 367 flow [2022-11-18 18:45:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:45:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:45:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2022-11-18 18:45:42,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9385474860335196 [2022-11-18 18:45:42,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2022-11-18 18:45:42,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2022-11-18 18:45:42,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:42,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2022-11-18 18:45:42,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:42,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:42,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:42,044 INFO L175 Difference]: Start difference. First operand has 160 places, 160 transitions, 339 flow. Second operand 3 states and 504 transitions. [2022-11-18 18:45:42,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 163 transitions, 367 flow [2022-11-18 18:45:42,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 163 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:45:42,051 INFO L231 Difference]: Finished difference. Result has 162 places, 160 transitions, 344 flow [2022-11-18 18:45:42,052 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=162, PETRI_TRANSITIONS=160} [2022-11-18 18:45:42,053 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, -2 predicate places. [2022-11-18 18:45:42,053 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 160 transitions, 344 flow [2022-11-18 18:45:42,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:42,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:42,054 INFO L209 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] [2022-11-18 18:45:42,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:45:42,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:45:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:42,056 INFO L85 PathProgramCache]: Analyzing trace with hash 217718797, now seen corresponding path program 1 times [2022-11-18 18:45:42,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:42,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628532806] [2022-11-18 18:45:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:42,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:42,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:42,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628532806] [2022-11-18 18:45:42,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628532806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:42,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:42,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:45:42,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023330141] [2022-11-18 18:45:42,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:42,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:45:42,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:42,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:45:42,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:45:42,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 179 [2022-11-18 18:45:42,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 160 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:42,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:42,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 179 [2022-11-18 18:45:42,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:42,402 INFO L130 PetriNetUnfolder]: 41/516 cut-off events. [2022-11-18 18:45:42,402 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 18:45:42,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 516 events. 41/516 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2023 event pairs, 13 based on Foata normal form. 0/485 useless extension candidates. Maximal degree in co-relation 403. Up to 37 conditions per place. [2022-11-18 18:45:42,408 INFO L137 encePairwiseOnDemand]: 174/179 looper letters, 16 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2022-11-18 18:45:42,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 168 transitions, 405 flow [2022-11-18 18:45:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:45:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 18:45:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 657 transitions. [2022-11-18 18:45:42,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9175977653631285 [2022-11-18 18:45:42,411 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 657 transitions. [2022-11-18 18:45:42,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 657 transitions. [2022-11-18 18:45:42,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:42,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 657 transitions. [2022-11-18 18:45:42,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:42,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:42,416 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:42,416 INFO L175 Difference]: Start difference. First operand has 162 places, 160 transitions, 344 flow. Second operand 4 states and 657 transitions. [2022-11-18 18:45:42,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 168 transitions, 405 flow [2022-11-18 18:45:42,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 168 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:45:42,423 INFO L231 Difference]: Finished difference. Result has 166 places, 163 transitions, 370 flow [2022-11-18 18:45:42,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2022-11-18 18:45:42,426 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 2 predicate places. [2022-11-18 18:45:42,426 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 370 flow [2022-11-18 18:45:42,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:42,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:42,428 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:42,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:45:42,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:45:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:42,430 INFO L85 PathProgramCache]: Analyzing trace with hash 131285715, now seen corresponding path program 1 times [2022-11-18 18:45:42,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:42,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338168837] [2022-11-18 18:45:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:42,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:42,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:42,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338168837] [2022-11-18 18:45:42,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338168837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:45:42,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175973397] [2022-11-18 18:45:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:42,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:45:42,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:45:42,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:45:42,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:45:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:42,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:45:42,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:43,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:43,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175973397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:43,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:45:43,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:45:43,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599486601] [2022-11-18 18:45:43,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:43,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:45:43,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:43,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:45:43,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:45:43,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 179 [2022-11-18 18:45:43,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 370 flow. Second operand has 10 states, 10 states have (on average 158.5) internal successors, (1585), 10 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:43,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:43,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 179 [2022-11-18 18:45:43,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:43,758 INFO L130 PetriNetUnfolder]: 177/1703 cut-off events. [2022-11-18 18:45:43,758 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2022-11-18 18:45:43,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2264 conditions, 1703 events. 177/1703 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 11070 event pairs, 28 based on Foata normal form. 9/1617 useless extension candidates. Maximal degree in co-relation 1786. Up to 135 conditions per place. [2022-11-18 18:45:43,772 INFO L137 encePairwiseOnDemand]: 173/179 looper letters, 48 selfloop transitions, 14 changer transitions 0/209 dead transitions. [2022-11-18 18:45:43,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 209 transitions, 619 flow [2022-11-18 18:45:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:45:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 18:45:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1624 transitions. [2022-11-18 18:45:43,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9072625698324023 [2022-11-18 18:45:43,776 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1624 transitions. [2022-11-18 18:45:43,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1624 transitions. [2022-11-18 18:45:43,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:43,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1624 transitions. [2022-11-18 18:45:43,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 162.4) internal successors, (1624), 10 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:43,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:43,787 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:43,787 INFO L175 Difference]: Start difference. First operand has 166 places, 163 transitions, 370 flow. Second operand 10 states and 1624 transitions. [2022-11-18 18:45:43,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 209 transitions, 619 flow [2022-11-18 18:45:43,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 209 transitions, 617 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:45:43,793 INFO L231 Difference]: Finished difference. Result has 177 places, 176 transitions, 462 flow [2022-11-18 18:45:43,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=462, PETRI_PLACES=177, PETRI_TRANSITIONS=176} [2022-11-18 18:45:43,794 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 13 predicate places. [2022-11-18 18:45:43,794 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 176 transitions, 462 flow [2022-11-18 18:45:43,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.5) internal successors, (1585), 10 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:43,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:43,796 INFO L209 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] [2022-11-18 18:45:43,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:44,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:45:44,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:45:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1774675618, now seen corresponding path program 1 times [2022-11-18 18:45:44,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:44,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660150693] [2022-11-18 18:45:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:44,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:44,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:44,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660150693] [2022-11-18 18:45:44,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660150693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:44,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:44,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:45:44,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714156654] [2022-11-18 18:45:44,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:44,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:45:44,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:45:44,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:45:44,228 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 179 [2022-11-18 18:45:44,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 176 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:44,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:44,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 179 [2022-11-18 18:45:44,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:44,443 INFO L130 PetriNetUnfolder]: 50/1065 cut-off events. [2022-11-18 18:45:44,443 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-18 18:45:44,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1361 conditions, 1065 events. 50/1065 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4617 event pairs, 10 based on Foata normal form. 12/1031 useless extension candidates. Maximal degree in co-relation 998. Up to 46 conditions per place. [2022-11-18 18:45:44,450 INFO L137 encePairwiseOnDemand]: 175/179 looper letters, 12 selfloop transitions, 4 changer transitions 0/173 dead transitions. [2022-11-18 18:45:44,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 173 transitions, 473 flow [2022-11-18 18:45:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:45:44,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:45:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2022-11-18 18:45:44,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9106145251396648 [2022-11-18 18:45:44,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2022-11-18 18:45:44,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2022-11-18 18:45:44,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:44,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2022-11-18 18:45:44,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:44,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:44,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:44,457 INFO L175 Difference]: Start difference. First operand has 177 places, 176 transitions, 462 flow. Second operand 3 states and 489 transitions. [2022-11-18 18:45:44,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 173 transitions, 473 flow [2022-11-18 18:45:44,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 173 transitions, 461 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-18 18:45:44,466 INFO L231 Difference]: Finished difference. Result has 177 places, 171 transitions, 430 flow [2022-11-18 18:45:44,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=177, PETRI_TRANSITIONS=171} [2022-11-18 18:45:44,469 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 13 predicate places. [2022-11-18 18:45:44,469 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 171 transitions, 430 flow [2022-11-18 18:45:44,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:44,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:44,470 INFO L209 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] [2022-11-18 18:45:44,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:45:44,471 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:45:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash 993598817, now seen corresponding path program 1 times [2022-11-18 18:45:44,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:44,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243587774] [2022-11-18 18:45:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:44,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:44,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:44,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243587774] [2022-11-18 18:45:44,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243587774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:44,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:44,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:45:44,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560361550] [2022-11-18 18:45:44,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:44,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:45:44,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:44,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:45:44,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:45:44,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 179 [2022-11-18 18:45:44,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 171 transitions, 430 flow. Second operand has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:44,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:44,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 179 [2022-11-18 18:45:44,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:45,053 INFO L130 PetriNetUnfolder]: 116/1219 cut-off events. [2022-11-18 18:45:45,054 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2022-11-18 18:45:45,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1823 conditions, 1219 events. 116/1219 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6055 event pairs, 19 based on Foata normal form. 0/1167 useless extension candidates. Maximal degree in co-relation 1103. Up to 178 conditions per place. [2022-11-18 18:45:45,061 INFO L137 encePairwiseOnDemand]: 168/179 looper letters, 49 selfloop transitions, 13 changer transitions 0/199 dead transitions. [2022-11-18 18:45:45,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 199 transitions, 639 flow [2022-11-18 18:45:45,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:45:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:45:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1371 transitions. [2022-11-18 18:45:45,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.851024208566108 [2022-11-18 18:45:45,065 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1371 transitions. [2022-11-18 18:45:45,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1371 transitions. [2022-11-18 18:45:45,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:45,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1371 transitions. [2022-11-18 18:45:45,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.33333333333334) internal successors, (1371), 9 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:45,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:45,073 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:45,073 INFO L175 Difference]: Start difference. First operand has 177 places, 171 transitions, 430 flow. Second operand 9 states and 1371 transitions. [2022-11-18 18:45:45,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 199 transitions, 639 flow [2022-11-18 18:45:45,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 199 transitions, 635 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:45:45,079 INFO L231 Difference]: Finished difference. Result has 189 places, 178 transitions, 514 flow [2022-11-18 18:45:45,079 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=514, PETRI_PLACES=189, PETRI_TRANSITIONS=178} [2022-11-18 18:45:45,080 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 25 predicate places. [2022-11-18 18:45:45,080 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 178 transitions, 514 flow [2022-11-18 18:45:45,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:45,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:45,081 INFO L209 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] [2022-11-18 18:45:45,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:45:45,081 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:45:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:45,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1614161045, now seen corresponding path program 1 times [2022-11-18 18:45:45,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:45,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640811309] [2022-11-18 18:45:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:45,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:47,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:47,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640811309] [2022-11-18 18:45:47,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640811309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:47,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:47,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-18 18:45:47,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594191713] [2022-11-18 18:45:47,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:47,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:45:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:47,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:45:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:45:47,026 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 179 [2022-11-18 18:45:47,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 178 transitions, 514 flow. Second operand has 24 states, 24 states have (on average 107.41666666666667) internal successors, (2578), 24 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:47,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:47,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 179 [2022-11-18 18:45:47,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:49,976 INFO L130 PetriNetUnfolder]: 1008/3988 cut-off events. [2022-11-18 18:45:49,976 INFO L131 PetriNetUnfolder]: For 550/550 co-relation queries the response was YES. [2022-11-18 18:45:49,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7445 conditions, 3988 events. 1008/3988 cut-off events. For 550/550 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 28801 event pairs, 174 based on Foata normal form. 0/3864 useless extension candidates. Maximal degree in co-relation 4391. Up to 1514 conditions per place. [2022-11-18 18:45:50,007 INFO L137 encePairwiseOnDemand]: 146/179 looper letters, 230 selfloop transitions, 41 changer transitions 4/372 dead transitions. [2022-11-18 18:45:50,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 372 transitions, 1586 flow [2022-11-18 18:45:50,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 18:45:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 18:45:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3410 transitions. [2022-11-18 18:45:50,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6350093109869647 [2022-11-18 18:45:50,015 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3410 transitions. [2022-11-18 18:45:50,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3410 transitions. [2022-11-18 18:45:50,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:50,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3410 transitions. [2022-11-18 18:45:50,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 113.66666666666667) internal successors, (3410), 30 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:50,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 179.0) internal successors, (5549), 31 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:50,035 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 179.0) internal successors, (5549), 31 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:50,035 INFO L175 Difference]: Start difference. First operand has 189 places, 178 transitions, 514 flow. Second operand 30 states and 3410 transitions. [2022-11-18 18:45:50,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 372 transitions, 1586 flow [2022-11-18 18:45:50,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 372 transitions, 1569 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-18 18:45:50,046 INFO L231 Difference]: Finished difference. Result has 242 places, 216 transitions, 827 flow [2022-11-18 18:45:50,046 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=827, PETRI_PLACES=242, PETRI_TRANSITIONS=216} [2022-11-18 18:45:50,047 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 78 predicate places. [2022-11-18 18:45:50,047 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 216 transitions, 827 flow [2022-11-18 18:45:50,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.41666666666667) internal successors, (2578), 24 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:50,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:50,048 INFO L209 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] [2022-11-18 18:45:50,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 18:45:50,049 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:45:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash 440539085, now seen corresponding path program 2 times [2022-11-18 18:45:50,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:50,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860194699] [2022-11-18 18:45:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:50,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:52,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:52,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860194699] [2022-11-18 18:45:52,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860194699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:52,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:52,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-18 18:45:52,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669043870] [2022-11-18 18:45:52,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:52,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 18:45:52,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 18:45:52,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2022-11-18 18:45:52,387 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 179 [2022-11-18 18:45:52,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 216 transitions, 827 flow. Second operand has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:52,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:52,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 179 [2022-11-18 18:45:52,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:56,806 INFO L130 PetriNetUnfolder]: 1256/5009 cut-off events. [2022-11-18 18:45:56,806 INFO L131 PetriNetUnfolder]: For 2355/2355 co-relation queries the response was YES. [2022-11-18 18:45:56,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10990 conditions, 5009 events. 1256/5009 cut-off events. For 2355/2355 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 39102 event pairs, 295 based on Foata normal form. 4/4928 useless extension candidates. Maximal degree in co-relation 6746. Up to 1532 conditions per place. [2022-11-18 18:45:56,864 INFO L137 encePairwiseOnDemand]: 143/179 looper letters, 237 selfloop transitions, 61 changer transitions 4/391 dead transitions. [2022-11-18 18:45:56,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 391 transitions, 2096 flow [2022-11-18 18:45:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 18:45:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-18 18:45:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3333 transitions. [2022-11-18 18:45:56,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5642458100558659 [2022-11-18 18:45:56,873 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3333 transitions. [2022-11-18 18:45:56,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3333 transitions. [2022-11-18 18:45:56,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:56,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3333 transitions. [2022-11-18 18:45:56,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 101.0) internal successors, (3333), 33 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:56,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 179.0) internal successors, (6086), 34 states have internal predecessors, (6086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:56,992 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 179.0) internal successors, (6086), 34 states have internal predecessors, (6086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:56,992 INFO L175 Difference]: Start difference. First operand has 242 places, 216 transitions, 827 flow. Second operand 33 states and 3333 transitions. [2022-11-18 18:45:56,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 391 transitions, 2096 flow [2022-11-18 18:45:57,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 391 transitions, 2095 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:45:57,017 INFO L231 Difference]: Finished difference. Result has 288 places, 235 transitions, 1156 flow [2022-11-18 18:45:57,017 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1156, PETRI_PLACES=288, PETRI_TRANSITIONS=235} [2022-11-18 18:45:57,018 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 124 predicate places. [2022-11-18 18:45:57,018 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 235 transitions, 1156 flow [2022-11-18 18:45:57,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:57,020 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:57,020 INFO L209 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] [2022-11-18 18:45:57,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:45:57,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:45:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:57,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2018269235, now seen corresponding path program 3 times [2022-11-18 18:45:57,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:57,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613009358] [2022-11-18 18:45:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:57,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:58,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:58,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613009358] [2022-11-18 18:45:58,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613009358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:58,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:58,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-18 18:45:58,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129223817] [2022-11-18 18:45:58,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:58,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 18:45:58,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:58,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 18:45:58,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2022-11-18 18:45:58,952 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 179 [2022-11-18 18:45:58,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 235 transitions, 1156 flow. Second operand has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:58,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:58,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 179 [2022-11-18 18:45:58,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:03,653 INFO L130 PetriNetUnfolder]: 1413/5630 cut-off events. [2022-11-18 18:46:03,653 INFO L131 PetriNetUnfolder]: For 3845/3848 co-relation queries the response was YES. [2022-11-18 18:46:03,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13184 conditions, 5630 events. 1413/5630 cut-off events. For 3845/3848 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 45616 event pairs, 127 based on Foata normal form. 4/5531 useless extension candidates. Maximal degree in co-relation 7283. Up to 1321 conditions per place. [2022-11-18 18:46:03,715 INFO L137 encePairwiseOnDemand]: 144/179 looper letters, 237 selfloop transitions, 78 changer transitions 4/408 dead transitions. [2022-11-18 18:46:03,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 408 transitions, 2495 flow [2022-11-18 18:46:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 18:46:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-18 18:46:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3426 transitions. [2022-11-18 18:46:03,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.562931317778508 [2022-11-18 18:46:03,727 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3426 transitions. [2022-11-18 18:46:03,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3426 transitions. [2022-11-18 18:46:03,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:03,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3426 transitions. [2022-11-18 18:46:03,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 100.76470588235294) internal successors, (3426), 34 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:03,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 179.0) internal successors, (6265), 35 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:03,755 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 179.0) internal successors, (6265), 35 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:03,755 INFO L175 Difference]: Start difference. First operand has 288 places, 235 transitions, 1156 flow. Second operand 34 states and 3426 transitions. [2022-11-18 18:46:03,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 408 transitions, 2495 flow [2022-11-18 18:46:03,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 408 transitions, 2403 flow, removed 27 selfloop flow, removed 14 redundant places. [2022-11-18 18:46:03,789 INFO L231 Difference]: Finished difference. Result has 320 places, 252 transitions, 1468 flow [2022-11-18 18:46:03,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1468, PETRI_PLACES=320, PETRI_TRANSITIONS=252} [2022-11-18 18:46:03,790 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 156 predicate places. [2022-11-18 18:46:03,790 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 252 transitions, 1468 flow [2022-11-18 18:46:03,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:03,792 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:03,793 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:03,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 18:46:03,793 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:46:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash -770466057, now seen corresponding path program 1 times [2022-11-18 18:46:03,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:03,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715209853] [2022-11-18 18:46:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:03,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:46:03,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:46:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:46:03,933 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:46:03,933 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:46:03,934 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-11-18 18:46:03,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-11-18 18:46:03,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-18 18:46:03,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-18 18:46:03,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-18 18:46:03,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-18 18:46:03,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 18:46:03,939 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:03,946 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-18 18:46:03,946 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-18 18:46:04,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 06:46:04 BasicIcfg [2022-11-18 18:46:04,128 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-18 18:46:04,128 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 18:46:04,129 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 18:46:04,129 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 18:46:04,129 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:45:40" (3/4) ... [2022-11-18 18:46:04,131 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-18 18:46:04,313 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/witness.graphml [2022-11-18 18:46:04,314 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 18:46:04,315 INFO L158 Benchmark]: Toolchain (without parser) took 25740.82ms. Allocated memory was 138.4MB in the beginning and 650.1MB in the end (delta: 511.7MB). Free memory was 104.4MB in the beginning and 312.4MB in the end (delta: -208.0MB). Peak memory consumption was 303.8MB. Max. memory is 16.1GB. [2022-11-18 18:46:04,315 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory is still 41.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 18:46:04,315 INFO L158 Benchmark]: CACSL2BoogieTranslator took 757.85ms. Allocated memory is still 138.4MB. Free memory was 104.4MB in the beginning and 92.4MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-18 18:46:04,316 INFO L158 Benchmark]: Boogie Procedure Inliner took 82.80ms. Allocated memory is still 138.4MB. Free memory was 92.4MB in the beginning and 89.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 18:46:04,316 INFO L158 Benchmark]: Boogie Preprocessor took 70.26ms. Allocated memory is still 138.4MB. Free memory was 89.9MB in the beginning and 87.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 18:46:04,316 INFO L158 Benchmark]: RCFGBuilder took 719.52ms. Allocated memory is still 138.4MB. Free memory was 87.8MB in the beginning and 70.5MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-18 18:46:04,317 INFO L158 Benchmark]: TraceAbstraction took 23896.70ms. Allocated memory was 138.4MB in the beginning and 650.1MB in the end (delta: 511.7MB). Free memory was 112.4MB in the beginning and 350.2MB in the end (delta: -237.8MB). Peak memory consumption was 273.9MB. Max. memory is 16.1GB. [2022-11-18 18:46:04,317 INFO L158 Benchmark]: Witness Printer took 185.29ms. Allocated memory is still 650.1MB. Free memory was 350.2MB in the beginning and 312.4MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-18 18:46:04,319 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory is still 41.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 757.85ms. Allocated memory is still 138.4MB. Free memory was 104.4MB in the beginning and 92.4MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 82.80ms. Allocated memory is still 138.4MB. Free memory was 92.4MB in the beginning and 89.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.26ms. Allocated memory is still 138.4MB. Free memory was 89.9MB in the beginning and 87.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 719.52ms. Allocated memory is still 138.4MB. Free memory was 87.8MB in the beginning and 70.5MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 23896.70ms. Allocated memory was 138.4MB in the beginning and 650.1MB in the end (delta: 511.7MB). Free memory was 112.4MB in the beginning and 350.2MB in the end (delta: -237.8MB). Peak memory consumption was 273.9MB. Max. memory is 16.1GB. * Witness Printer took 185.29ms. Allocated memory is still 650.1MB. Free memory was 350.2MB in the beginning and 312.4MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L936] 0 static unsigned int arr[(800)]; VAL [arr={3:0}] [L938] 0 _Bool flag=(0); VAL [arr={3:0}, flag=0] [L937] 0 pthread_mutex_t m; VAL [arr={3:0}, flag=0, m={4:0}] [L935] 0 static int top=0; VAL [arr={3:0}, flag=0, m={4:0}, top=0] [L1020] 0 pthread_t id1, id2; VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L989] 1 int i; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=0] [L990] 1 unsigned int tmp; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=0] [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L991] COND TRUE 1 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L994] 1 tmp = __VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=4294968095, arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, tmp=799, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) VAL [\old(cond)=1, arr={3:0}, cond=1, flag=0, m={4:0}, top=0] [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L961] COND FALSE 1 !(top==(800)) VAL [\old(x)=799, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=799] [L968] CALL, EXPR 1 get_top() [L953] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x VAL [\old(x)=799, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=799] [L969] CALL 1 inc_top() [L945] 1 top++ VAL [arr={3:0}, flag=0, m={4:0}, top=1] [L969] RET 1 inc_top() [L971] 1 return 0; VAL [\old(x)=799, \result=0, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=1, x=799] [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, push(arr,tmp)=0, tmp=799, top=1] [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=799, top=1] [L1005] 2 int i; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, m={4:0}, top=1] [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1006] COND TRUE 2 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1009] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=1, \result=0, arr={3:0}, flag=1, m={4:0}, top=1] [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) VAL [arr={3:0}, flag=1, get_top()=1, m={4:0}, stack={3:0}, stack={3:0}, top=1] [L982] CALL 2 dec_top() [L949] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] VAL [arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, stack[get_top()]=799, top=0] [L983] 2 return stack[get_top()]; VAL [\result=799, arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, stack[get_top()]=799, top=0] [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, pop(arr)=799, top=0] [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1009] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 VAL [arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0] [L978] 2 return (-2); VAL [\result=-2, arr={3:0}, flag=1, m={4:0}, stack={3:0}, stack={3:0}, top=0] [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, pop(arr)=-2, top=0] [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 288 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 23.5s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 14.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1686 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1686 mSDsluCounter, 3444 SdHoareTripleChecker+Invalid, 3.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3196 mSDsCounter, 29 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6527 IncrementalHoareTripleChecker+Invalid, 6556 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29 mSolverCounterUnsat, 248 mSDtfsCounter, 6527 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 402 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1468occurred in iteration=9, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 1156 NumberOfCodeBlocks, 1156 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1098 ConstructedInterpolants, 0 QuantifiedInterpolants, 8412 SizeOfPredicates, 2 NumberOfNonLiveVariables, 240 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 12/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-18 18:46:04,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96a033-c891-413d-b6c3-2abc6e0f3dd8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE