./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1 --witnessprinter.witness.filename witness --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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 11:12:05,065 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 11:12:05,118 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 11:12:05,122 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 11:12:05,122 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 11:12:05,142 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 11:12:05,143 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 11:12:05,143 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 11:12:05,143 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 11:12:05,143 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 11:12:05,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 11:12:05,144 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 11:12:05,144 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 11:12:05,144 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 11:12:05,144 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 11:12:05,144 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 11:12:05,144 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 11:12:05,144 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 11:12:05,145 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 11:12:05,145 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 11:12:05,145 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 11:12:05,145 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 11:12:05,145 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 11:12:05,145 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 11:12:05,145 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 11:12:05,145 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 11:12:05,145 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 11:12:05,145 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 11:12:05,146 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 11:12:05,146 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:12:05,146 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:12:05,146 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:12:05,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:12:05,146 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 11:12:05,146 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:12:05,146 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:12:05,146 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:12:05,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:12:05,147 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 11:12:05,147 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 11:12:05,147 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 11:12:05,147 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 11:12:05,147 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 11:12:05,147 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 11:12:05,147 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 11:12:05,147 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 11:12:05,147 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 11:12:05,148 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 11:12:05,148 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-12-02 11:12:05,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 11:12:05,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 11:12:05,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 11:12:05,363 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 11:12:05,363 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 11:12:05,364 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-12-02 11:12:08,029 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/data/dbbd72c5f/5846adfd34204e5b843ba9623426aa87/FLAG3fa2fe327 [2024-12-02 11:12:08,207 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 11:12:08,207 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-12-02 11:12:08,215 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/data/dbbd72c5f/5846adfd34204e5b843ba9623426aa87/FLAG3fa2fe327 [2024-12-02 11:12:08,230 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/data/dbbd72c5f/5846adfd34204e5b843ba9623426aa87 [2024-12-02 11:12:08,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 11:12:08,234 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 11:12:08,235 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 11:12:08,235 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 11:12:08,240 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 11:12:08,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,241 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64cad158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08, skipping insertion in model container [2024-12-02 11:12:08,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,260 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 11:12:08,434 WARN L250 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_a9e557ee-3c3a-4579-afbf-8c0e9023b522/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2024-12-02 11:12:08,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:12:08,449 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 11:12:08,473 WARN L250 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_a9e557ee-3c3a-4579-afbf-8c0e9023b522/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2024-12-02 11:12:08,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:12:08,487 INFO L204 MainTranslator]: Completed translation [2024-12-02 11:12:08,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08 WrapperNode [2024-12-02 11:12:08,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 11:12:08,489 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 11:12:08,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 11:12:08,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 11:12:08,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,504 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,533 INFO L138 Inliner]: procedures = 24, calls = 53, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 331 [2024-12-02 11:12:08,533 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 11:12:08,534 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 11:12:08,534 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 11:12:08,534 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 11:12:08,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,548 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,566 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-12-02 11:12:08,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,576 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,578 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,583 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,584 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,586 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,589 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 11:12:08,590 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 11:12:08,590 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 11:12:08,590 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 11:12:08,591 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (1/1) ... [2024-12-02 11:12:08,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:12:08,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:12:08,623 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 11:12:08,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 11:12:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 11:12:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 11:12:08,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 11:12:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 11:12:08,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 11:12:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 11:12:08,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 11:12:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 11:12:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 11:12:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 11:12:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 11:12:08,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 11:12:08,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 11:12:08,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 11:12:08,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 11:12:08,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 11:12:08,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 11:12:08,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 11:12:08,656 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 11:12:08,751 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 11:12:08,753 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 11:12:09,219 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 11:12:09,219 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 11:12:09,524 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 11:12:09,524 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-12-02 11:12:09,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:12:09 BoogieIcfgContainer [2024-12-02 11:12:09,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 11:12:09,527 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 11:12:09,527 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 11:12:09,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 11:12:09,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 11:12:08" (1/3) ... [2024-12-02 11:12:09,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6100d059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:12:09, skipping insertion in model container [2024-12-02 11:12:09,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:12:08" (2/3) ... [2024-12-02 11:12:09,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6100d059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:12:09, skipping insertion in model container [2024-12-02 11:12:09,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:12:09" (3/3) ... [2024-12-02 11:12:09,532 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2024-12-02 11:12:09,544 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 11:12:09,545 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-commit-1.wvr-bad.c that has 4 procedures, 45 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-12-02 11:12:09,546 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 11:12:09,598 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 11:12:09,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 61 transitions, 143 flow [2024-12-02 11:12:09,663 INFO L124 PetriNetUnfolderBase]: 17/58 cut-off events. [2024-12-02 11:12:09,664 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 11:12:09,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 17/58 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 48. Up to 6 conditions per place. [2024-12-02 11:12:09,668 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 61 transitions, 143 flow [2024-12-02 11:12:09,671 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 57 transitions, 132 flow [2024-12-02 11:12:09,678 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 11:12:09,689 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1400e3c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 11:12:09,689 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-12-02 11:12:09,706 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 11:12:09,706 INFO L124 PetriNetUnfolderBase]: 17/56 cut-off events. [2024-12-02 11:12:09,706 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 11:12:09,706 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:09,706 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:12:09,707 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:09,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:09,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1211094217, now seen corresponding path program 1 times [2024-12-02 11:12:09,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:09,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494458230] [2024-12-02 11:12:09,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:09,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:12:09,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:09,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494458230] [2024-12-02 11:12:09,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494458230] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:12:09,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:12:09,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:12:09,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715981302] [2024-12-02 11:12:09,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:12:09,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 11:12:09,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:09,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 11:12:09,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 11:12:09,950 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-12-02 11:12:09,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 57 transitions, 132 flow. Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2024-12-02 11:12:09,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:09,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-12-02 11:12:09,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:12:10,246 INFO L124 PetriNetUnfolderBase]: 1168/1724 cut-off events. [2024-12-02 11:12:10,246 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-12-02 11:12:10,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3269 conditions, 1724 events. 1168/1724 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6962 event pairs, 608 based on Foata normal form. 0/1335 useless extension candidates. Maximal degree in co-relation 3018. Up to 1448 conditions per place. [2024-12-02 11:12:10,263 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 37 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2024-12-02 11:12:10,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 200 flow [2024-12-02 11:12:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 11:12:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-12-02 11:12:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 80 transitions. [2024-12-02 11:12:10,276 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6557377049180327 [2024-12-02 11:12:10,277 INFO L175 Difference]: Start difference. First operand has 50 places, 57 transitions, 132 flow. Second operand 2 states and 80 transitions. [2024-12-02 11:12:10,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 200 flow [2024-12-02 11:12:10,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 188 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 11:12:10,286 INFO L231 Difference]: Finished difference. Result has 45 places, 54 transitions, 114 flow [2024-12-02 11:12:10,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=54} [2024-12-02 11:12:10,292 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2024-12-02 11:12:10,292 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 54 transitions, 114 flow [2024-12-02 11:12:10,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2024-12-02 11:12:10,293 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:10,293 INFO L206 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] [2024-12-02 11:12:10,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 11:12:10,293 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:10,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:10,294 INFO L85 PathProgramCache]: Analyzing trace with hash -581155928, now seen corresponding path program 1 times [2024-12-02 11:12:10,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:10,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073009583] [2024-12-02 11:12:10,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:10,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:12:10,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:10,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073009583] [2024-12-02 11:12:10,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073009583] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:12:10,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:12:10,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:12:10,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635755285] [2024-12-02 11:12:10,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:12:10,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:12:10,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:10,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:12:10,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:12:10,497 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-12-02 11:12:10,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 54 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2024-12-02 11:12:10,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:10,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-12-02 11:12:10,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:12:10,995 INFO L124 PetriNetUnfolderBase]: 2327/3658 cut-off events. [2024-12-02 11:12:10,995 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-12-02 11:12:11,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6607 conditions, 3658 events. 2327/3658 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18920 event pairs, 608 based on Foata normal form. 1/2839 useless extension candidates. Maximal degree in co-relation 6604. Up to 1685 conditions per place. [2024-12-02 11:12:11,024 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 59 selfloop transitions, 5 changer transitions 1/82 dead transitions. [2024-12-02 11:12:11,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 82 transitions, 305 flow [2024-12-02 11:12:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:12:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:12:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-12-02 11:12:11,026 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6885245901639344 [2024-12-02 11:12:11,026 INFO L175 Difference]: Start difference. First operand has 45 places, 54 transitions, 114 flow. Second operand 3 states and 126 transitions. [2024-12-02 11:12:11,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 82 transitions, 305 flow [2024-12-02 11:12:11,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 305 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 11:12:11,030 INFO L231 Difference]: Finished difference. Result has 48 places, 58 transitions, 147 flow [2024-12-02 11:12:11,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=48, PETRI_TRANSITIONS=58} [2024-12-02 11:12:11,031 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-12-02 11:12:11,031 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 58 transitions, 147 flow [2024-12-02 11:12:11,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2024-12-02 11:12:11,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:11,031 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-12-02 11:12:11,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 11:12:11,032 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:11,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:11,032 INFO L85 PathProgramCache]: Analyzing trace with hash -96336806, now seen corresponding path program 1 times [2024-12-02 11:12:11,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:11,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089996399] [2024-12-02 11:12:11,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:11,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:12:11,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:11,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089996399] [2024-12-02 11:12:11,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089996399] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:12:11,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:12:11,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:12:11,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22224482] [2024-12-02 11:12:11,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:12:11,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:12:11,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:11,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:12:11,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:12:11,168 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-12-02 11:12:11,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 58 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-12-02 11:12:11,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:11,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-12-02 11:12:11,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:12:11,855 INFO L124 PetriNetUnfolderBase]: 4376/6666 cut-off events. [2024-12-02 11:12:11,855 INFO L125 PetriNetUnfolderBase]: For 1043/1043 co-relation queries the response was YES. [2024-12-02 11:12:11,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13306 conditions, 6666 events. 4376/6666 cut-off events. For 1043/1043 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 36162 event pairs, 1536 based on Foata normal form. 236/5370 useless extension candidates. Maximal degree in co-relation 13301. Up to 3068 conditions per place. [2024-12-02 11:12:11,885 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 65 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2024-12-02 11:12:11,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 85 transitions, 353 flow [2024-12-02 11:12:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:12:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:12:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-12-02 11:12:11,887 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6775956284153005 [2024-12-02 11:12:11,887 INFO L175 Difference]: Start difference. First operand has 48 places, 58 transitions, 147 flow. Second operand 3 states and 124 transitions. [2024-12-02 11:12:11,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 85 transitions, 353 flow [2024-12-02 11:12:11,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 85 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 11:12:11,890 INFO L231 Difference]: Finished difference. Result has 50 places, 60 transitions, 167 flow [2024-12-02 11:12:11,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=50, PETRI_TRANSITIONS=60} [2024-12-02 11:12:11,891 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-12-02 11:12:11,891 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 167 flow [2024-12-02 11:12:11,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-12-02 11:12:11,891 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:11,891 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-12-02 11:12:11,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 11:12:11,891 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:11,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1331316460, now seen corresponding path program 1 times [2024-12-02 11:12:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:11,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484680167] [2024-12-02 11:12:11,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:12:11,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:11,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484680167] [2024-12-02 11:12:11,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484680167] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:12:11,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:12:11,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:12:11,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072448360] [2024-12-02 11:12:11,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:12:11,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:12:11,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:11,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:12:11,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:12:11,976 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-12-02 11:12:11,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-12-02 11:12:11,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:11,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-12-02 11:12:11,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:12:12,860 INFO L124 PetriNetUnfolderBase]: 8305/13348 cut-off events. [2024-12-02 11:12:12,860 INFO L125 PetriNetUnfolderBase]: For 3342/3366 co-relation queries the response was YES. [2024-12-02 11:12:12,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27098 conditions, 13348 events. 8305/13348 cut-off events. For 3342/3366 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 88199 event pairs, 2722 based on Foata normal form. 240/10619 useless extension candidates. Maximal degree in co-relation 27092. Up to 5665 conditions per place. [2024-12-02 11:12:12,940 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 74 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2024-12-02 11:12:12,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 93 transitions, 422 flow [2024-12-02 11:12:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:12:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:12:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-12-02 11:12:12,942 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6885245901639344 [2024-12-02 11:12:12,942 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 167 flow. Second operand 3 states and 126 transitions. [2024-12-02 11:12:12,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 93 transitions, 422 flow [2024-12-02 11:12:12,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 93 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 11:12:12,945 INFO L231 Difference]: Finished difference. Result has 52 places, 61 transitions, 178 flow [2024-12-02 11:12:12,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=52, PETRI_TRANSITIONS=61} [2024-12-02 11:12:12,946 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-12-02 11:12:12,946 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 61 transitions, 178 flow [2024-12-02 11:12:12,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-12-02 11:12:12,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:12,947 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-12-02 11:12:12,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 11:12:12,947 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:12,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:12,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1152449705, now seen corresponding path program 1 times [2024-12-02 11:12:12,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:12,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054632810] [2024-12-02 11:12:12,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:12,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:12:13,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:13,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054632810] [2024-12-02 11:12:13,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054632810] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:12:13,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:12:13,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:12:13,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286638905] [2024-12-02 11:12:13,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:12:13,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:12:13,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:13,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:12:13,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:12:13,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 61 [2024-12-02 11:12:13,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 61 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-12-02 11:12:13,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:13,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 61 [2024-12-02 11:12:13,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:12:14,155 INFO L124 PetriNetUnfolderBase]: 13331/19439 cut-off events. [2024-12-02 11:12:14,155 INFO L125 PetriNetUnfolderBase]: For 6515/6537 co-relation queries the response was YES. [2024-12-02 11:12:14,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42508 conditions, 19439 events. 13331/19439 cut-off events. For 6515/6537 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 114347 event pairs, 6174 based on Foata normal form. 0/15578 useless extension candidates. Maximal degree in co-relation 42501. Up to 10586 conditions per place. [2024-12-02 11:12:14,226 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 69 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2024-12-02 11:12:14,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 89 transitions, 420 flow [2024-12-02 11:12:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:12:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:12:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2024-12-02 11:12:14,228 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6338797814207651 [2024-12-02 11:12:14,228 INFO L175 Difference]: Start difference. First operand has 52 places, 61 transitions, 178 flow. Second operand 3 states and 116 transitions. [2024-12-02 11:12:14,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 89 transitions, 420 flow [2024-12-02 11:12:14,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 89 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 11:12:14,231 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 206 flow [2024-12-02 11:12:14,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2024-12-02 11:12:14,232 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-12-02 11:12:14,232 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 206 flow [2024-12-02 11:12:14,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-12-02 11:12:14,233 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:14,233 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-12-02 11:12:14,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 11:12:14,233 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:14,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:14,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1331891046, now seen corresponding path program 1 times [2024-12-02 11:12:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:14,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470838395] [2024-12-02 11:12:14,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:14,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:12:14,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:14,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470838395] [2024-12-02 11:12:14,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470838395] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:12:14,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:12:14,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:12:14,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979090039] [2024-12-02 11:12:14,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:12:14,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:12:14,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:14,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:12:14,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:12:14,398 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-12-02 11:12:14,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2024-12-02 11:12:14,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:14,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-12-02 11:12:14,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:12:15,578 INFO L124 PetriNetUnfolderBase]: 12942/19994 cut-off events. [2024-12-02 11:12:15,578 INFO L125 PetriNetUnfolderBase]: For 9546/9730 co-relation queries the response was YES. [2024-12-02 11:12:15,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43960 conditions, 19994 events. 12942/19994 cut-off events. For 9546/9730 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 129055 event pairs, 9078 based on Foata normal form. 285/16411 useless extension candidates. Maximal degree in co-relation 43952. Up to 13549 conditions per place. [2024-12-02 11:12:15,663 INFO L140 encePairwiseOnDemand]: 52/61 looper letters, 74 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2024-12-02 11:12:15,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 99 transitions, 462 flow [2024-12-02 11:12:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 11:12:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 11:12:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-12-02 11:12:15,665 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5704918032786885 [2024-12-02 11:12:15,665 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 206 flow. Second operand 5 states and 174 transitions. [2024-12-02 11:12:15,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 99 transitions, 462 flow [2024-12-02 11:12:15,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 99 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:12:15,686 INFO L231 Difference]: Finished difference. Result has 60 places, 68 transitions, 248 flow [2024-12-02 11:12:15,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=60, PETRI_TRANSITIONS=68} [2024-12-02 11:12:15,686 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-12-02 11:12:15,687 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 68 transitions, 248 flow [2024-12-02 11:12:15,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2024-12-02 11:12:15,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:15,687 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-12-02 11:12:15,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 11:12:15,687 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:15,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:15,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1664312523, now seen corresponding path program 1 times [2024-12-02 11:12:15,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:15,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990334271] [2024-12-02 11:12:15,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:15,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:12:15,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:15,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990334271] [2024-12-02 11:12:15,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990334271] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:12:15,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:12:15,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:12:15,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722443968] [2024-12-02 11:12:15,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:12:15,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:12:15,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:15,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:12:15,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:12:15,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 61 [2024-12-02 11:12:15,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 68 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-12-02 11:12:15,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:15,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 61 [2024-12-02 11:12:15,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:12:16,987 INFO L124 PetriNetUnfolderBase]: 13390/19544 cut-off events. [2024-12-02 11:12:16,987 INFO L125 PetriNetUnfolderBase]: For 5744/6085 co-relation queries the response was YES. [2024-12-02 11:12:17,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43058 conditions, 19544 events. 13390/19544 cut-off events. For 5744/6085 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 106120 event pairs, 5854 based on Foata normal form. 20/16339 useless extension candidates. Maximal degree in co-relation 43047. Up to 10044 conditions per place. [2024-12-02 11:12:17,181 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 67 selfloop transitions, 5 changer transitions 5/90 dead transitions. [2024-12-02 11:12:17,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 458 flow [2024-12-02 11:12:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:12:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:12:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-12-02 11:12:17,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6120218579234973 [2024-12-02 11:12:17,183 INFO L175 Difference]: Start difference. First operand has 60 places, 68 transitions, 248 flow. Second operand 3 states and 112 transitions. [2024-12-02 11:12:17,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 458 flow [2024-12-02 11:12:17,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 454 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 11:12:17,187 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 228 flow [2024-12-02 11:12:17,187 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-12-02 11:12:17,188 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-12-02 11:12:17,188 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 228 flow [2024-12-02 11:12:17,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-12-02 11:12:17,188 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:17,188 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-12-02 11:12:17,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 11:12:17,188 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:17,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:17,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1323300852, now seen corresponding path program 1 times [2024-12-02 11:12:17,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:17,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492366655] [2024-12-02 11:12:17,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:17,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:12:17,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:17,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492366655] [2024-12-02 11:12:17,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492366655] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:12:17,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605802974] [2024-12-02 11:12:17,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:17,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:12:17,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:12:17,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:12:17,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 11:12:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:18,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-12-02 11:12:18,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:12:18,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 11:12:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:12:18,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:12:18,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-12-02 11:12:18,838 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 11:12:18,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-12-02 11:12:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:12:18,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605802974] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:12:18,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:12:18,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-12-02 11:12:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034791098] [2024-12-02 11:12:18,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:12:18,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 11:12:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:18,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 11:12:18,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-12-02 11:12:18,885 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-12-02 11:12:18,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 228 flow. Second operand has 22 states, 22 states have (on average 24.09090909090909) internal successors, (530), 22 states have internal predecessors, (530), 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) [2024-12-02 11:12:18,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:18,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-12-02 11:12:18,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:12:24,570 INFO L124 PetriNetUnfolderBase]: 49834/75960 cut-off events. [2024-12-02 11:12:24,570 INFO L125 PetriNetUnfolderBase]: For 44527/46918 co-relation queries the response was YES. [2024-12-02 11:12:24,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175155 conditions, 75960 events. 49834/75960 cut-off events. For 44527/46918 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 554954 event pairs, 5393 based on Foata normal form. 60/60648 useless extension candidates. Maximal degree in co-relation 175143. Up to 11894 conditions per place. [2024-12-02 11:12:24,901 INFO L140 encePairwiseOnDemand]: 41/61 looper letters, 342 selfloop transitions, 72 changer transitions 9/442 dead transitions. [2024-12-02 11:12:24,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 442 transitions, 2281 flow [2024-12-02 11:12:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 11:12:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-12-02 11:12:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 873 transitions. [2024-12-02 11:12:24,904 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6222380612972203 [2024-12-02 11:12:24,904 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 228 flow. Second operand 23 states and 873 transitions. [2024-12-02 11:12:24,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 442 transitions, 2281 flow [2024-12-02 11:12:24,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 442 transitions, 2195 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-12-02 11:12:24,933 INFO L231 Difference]: Finished difference. Result has 93 places, 134 transitions, 901 flow [2024-12-02 11:12:24,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=901, PETRI_PLACES=93, PETRI_TRANSITIONS=134} [2024-12-02 11:12:24,933 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-12-02 11:12:24,934 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 134 transitions, 901 flow [2024-12-02 11:12:24,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.09090909090909) internal successors, (530), 22 states have internal predecessors, (530), 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) [2024-12-02 11:12:24,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:24,934 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-12-02 11:12:24,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 11:12:25,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:12:25,135 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:25,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1239154986, now seen corresponding path program 1 times [2024-12-02 11:12:25,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:25,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000166582] [2024-12-02 11:12:25,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:25,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:12:25,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:25,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000166582] [2024-12-02 11:12:25,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000166582] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:12:25,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:12:25,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:12:25,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496533476] [2024-12-02 11:12:25,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:12:25,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:12:25,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:25,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:12:25,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:12:25,180 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 61 [2024-12-02 11:12:25,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 134 transitions, 901 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2024-12-02 11:12:25,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:25,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 61 [2024-12-02 11:12:25,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:12:32,860 INFO L124 PetriNetUnfolderBase]: 70350/106081 cut-off events. [2024-12-02 11:12:32,860 INFO L125 PetriNetUnfolderBase]: For 207022/211824 co-relation queries the response was YES. [2024-12-02 11:12:33,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323922 conditions, 106081 events. 70350/106081 cut-off events. For 207022/211824 co-relation queries the response was YES. Maximal size of possible extension queue 2228. Compared 791842 event pairs, 36619 based on Foata normal form. 136/84978 useless extension candidates. Maximal degree in co-relation 323898. Up to 69060 conditions per place. [2024-12-02 11:12:33,501 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 129 selfloop transitions, 8 changer transitions 2/155 dead transitions. [2024-12-02 11:12:33,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 155 transitions, 1276 flow [2024-12-02 11:12:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:12:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:12:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2024-12-02 11:12:33,502 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6338797814207651 [2024-12-02 11:12:33,502 INFO L175 Difference]: Start difference. First operand has 93 places, 134 transitions, 901 flow. Second operand 3 states and 116 transitions. [2024-12-02 11:12:33,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 155 transitions, 1276 flow [2024-12-02 11:12:34,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 155 transitions, 1210 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-12-02 11:12:34,343 INFO L231 Difference]: Finished difference. Result has 95 places, 122 transitions, 766 flow [2024-12-02 11:12:34,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=766, PETRI_PLACES=95, PETRI_TRANSITIONS=122} [2024-12-02 11:12:34,344 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-12-02 11:12:34,344 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 122 transitions, 766 flow [2024-12-02 11:12:34,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2024-12-02 11:12:34,344 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:34,344 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-12-02 11:12:34,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 11:12:34,344 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:34,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:34,345 INFO L85 PathProgramCache]: Analyzing trace with hash 622797277, now seen corresponding path program 1 times [2024-12-02 11:12:34,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:34,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973898715] [2024-12-02 11:12:34,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:34,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 11:12:34,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:34,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973898715] [2024-12-02 11:12:34,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973898715] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:12:34,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:12:34,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:12:34,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772987912] [2024-12-02 11:12:34,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:12:34,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:12:34,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:34,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:12:34,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:12:34,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-12-02 11:12:34,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 122 transitions, 766 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-12-02 11:12:34,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:34,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-12-02 11:12:34,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:12:42,287 INFO L124 PetriNetUnfolderBase]: 60126/93918 cut-off events. [2024-12-02 11:12:42,287 INFO L125 PetriNetUnfolderBase]: For 267868/274469 co-relation queries the response was YES. [2024-12-02 11:12:42,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300426 conditions, 93918 events. 60126/93918 cut-off events. For 267868/274469 co-relation queries the response was YES. Maximal size of possible extension queue 1786. Compared 718608 event pairs, 18351 based on Foata normal form. 1136/75848 useless extension candidates. Maximal degree in co-relation 300401. Up to 54699 conditions per place. [2024-12-02 11:12:42,843 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 131 selfloop transitions, 2 changer transitions 0/153 dead transitions. [2024-12-02 11:12:42,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 153 transitions, 1234 flow [2024-12-02 11:12:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:12:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:12:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-12-02 11:12:42,844 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-12-02 11:12:42,844 INFO L175 Difference]: Start difference. First operand has 95 places, 122 transitions, 766 flow. Second operand 3 states and 122 transitions. [2024-12-02 11:12:42,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 153 transitions, 1234 flow [2024-12-02 11:12:43,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 153 transitions, 1198 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-12-02 11:12:43,874 INFO L231 Difference]: Finished difference. Result has 92 places, 115 transitions, 692 flow [2024-12-02 11:12:43,874 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=692, PETRI_PLACES=92, PETRI_TRANSITIONS=115} [2024-12-02 11:12:43,874 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-12-02 11:12:43,874 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 115 transitions, 692 flow [2024-12-02 11:12:43,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-12-02 11:12:43,875 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:43,875 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-12-02 11:12:43,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 11:12:43,875 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:43,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash -546293923, now seen corresponding path program 1 times [2024-12-02 11:12:43,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:43,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549116773] [2024-12-02 11:12:43,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:43,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:12:44,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:44,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549116773] [2024-12-02 11:12:44,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549116773] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:12:44,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739021451] [2024-12-02 11:12:44,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:12:44,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:12:44,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:12:44,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:12:44,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 11:12:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:12:44,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 11:12:44,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:12:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:12:45,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:12:45,178 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 11:12:45,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-12-02 11:12:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 11:12:45,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739021451] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:12:45,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:12:45,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2024-12-02 11:12:45,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82375312] [2024-12-02 11:12:45,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:12:45,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 11:12:45,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:45,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 11:12:45,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-12-02 11:12:45,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-12-02 11:12:45,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 115 transitions, 692 flow. Second operand has 18 states, 18 states have (on average 24.333333333333332) internal successors, (438), 18 states have internal predecessors, (438), 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) [2024-12-02 11:12:45,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:45,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-12-02 11:12:45,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:12:53,963 INFO L124 PetriNetUnfolderBase]: 68530/106540 cut-off events. [2024-12-02 11:12:53,963 INFO L125 PetriNetUnfolderBase]: For 246335/252709 co-relation queries the response was YES. [2024-12-02 11:12:54,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338866 conditions, 106540 events. 68530/106540 cut-off events. For 246335/252709 co-relation queries the response was YES. Maximal size of possible extension queue 2010. Compared 814162 event pairs, 11269 based on Foata normal form. 156/84625 useless extension candidates. Maximal degree in co-relation 338841. Up to 65466 conditions per place. [2024-12-02 11:12:54,582 INFO L140 encePairwiseOnDemand]: 42/61 looper letters, 142 selfloop transitions, 88 changer transitions 47/297 dead transitions. [2024-12-02 11:12:54,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 297 transitions, 2017 flow [2024-12-02 11:12:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 11:12:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-12-02 11:12:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 595 transitions. [2024-12-02 11:12:54,585 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5133735979292493 [2024-12-02 11:12:54,585 INFO L175 Difference]: Start difference. First operand has 92 places, 115 transitions, 692 flow. Second operand 19 states and 595 transitions. [2024-12-02 11:12:54,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 297 transitions, 2017 flow [2024-12-02 11:12:55,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 297 transitions, 2014 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 11:12:55,115 INFO L231 Difference]: Finished difference. Result has 121 places, 165 transitions, 1433 flow [2024-12-02 11:12:55,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1433, PETRI_PLACES=121, PETRI_TRANSITIONS=165} [2024-12-02 11:12:55,115 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-12-02 11:12:55,115 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 165 transitions, 1433 flow [2024-12-02 11:12:55,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.333333333333332) internal successors, (438), 18 states have internal predecessors, (438), 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) [2024-12-02 11:12:55,116 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:12:55,116 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-12-02 11:12:55,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 11:12:55,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:12:55,316 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:12:55,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:12:55,317 INFO L85 PathProgramCache]: Analyzing trace with hash 554880556, now seen corresponding path program 2 times [2024-12-02 11:12:55,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:12:55,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961722744] [2024-12-02 11:12:55,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:12:55,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:12:55,343 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:12:55,343 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:12:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:12:55,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:12:55,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961722744] [2024-12-02 11:12:55,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961722744] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:12:55,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:12:55,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:12:55,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386431145] [2024-12-02 11:12:55,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:12:55,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:12:55,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:12:55,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:12:55,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:12:55,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 61 [2024-12-02 11:12:55,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 165 transitions, 1433 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-12-02 11:12:55,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:12:55,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 61 [2024-12-02 11:12:55,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:13:08,163 INFO L124 PetriNetUnfolderBase]: 90140/132633 cut-off events. [2024-12-02 11:13:08,164 INFO L125 PetriNetUnfolderBase]: For 775341/781719 co-relation queries the response was YES. [2024-12-02 11:13:08,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598215 conditions, 132633 events. 90140/132633 cut-off events. For 775341/781719 co-relation queries the response was YES. Maximal size of possible extension queue 2276. Compared 945958 event pairs, 28582 based on Foata normal form. 100/111976 useless extension candidates. Maximal degree in co-relation 598178. Up to 72466 conditions per place. [2024-12-02 11:13:09,234 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 164 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2024-12-02 11:13:09,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 194 transitions, 2068 flow [2024-12-02 11:13:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:13:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:13:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-12-02 11:13:09,235 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5956284153005464 [2024-12-02 11:13:09,236 INFO L175 Difference]: Start difference. First operand has 121 places, 165 transitions, 1433 flow. Second operand 3 states and 109 transitions. [2024-12-02 11:13:09,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 194 transitions, 2068 flow [2024-12-02 11:13:12,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 194 transitions, 1903 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-12-02 11:13:12,237 INFO L231 Difference]: Finished difference. Result has 117 places, 164 transitions, 1310 flow [2024-12-02 11:13:12,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1310, PETRI_PLACES=117, PETRI_TRANSITIONS=164} [2024-12-02 11:13:12,239 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 67 predicate places. [2024-12-02 11:13:12,239 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 164 transitions, 1310 flow [2024-12-02 11:13:12,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-12-02 11:13:12,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:13:12,239 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-12-02 11:13:12,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 11:13:12,239 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:13:12,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:13:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1117500401, now seen corresponding path program 1 times [2024-12-02 11:13:12,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:13:12,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696952332] [2024-12-02 11:13:12,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:13:12,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:13:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:13:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:13:12,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:13:12,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696952332] [2024-12-02 11:13:12,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696952332] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:13:12,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:13:12,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:13:12,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508219141] [2024-12-02 11:13:12,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:13:12,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:13:12,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:13:12,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:13:12,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:13:12,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 61 [2024-12-02 11:13:12,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 164 transitions, 1310 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2024-12-02 11:13:12,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:13:12,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 61 [2024-12-02 11:13:12,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:13:23,869 INFO L124 PetriNetUnfolderBase]: 76357/111682 cut-off events. [2024-12-02 11:13:23,869 INFO L125 PetriNetUnfolderBase]: For 660717/667678 co-relation queries the response was YES. [2024-12-02 11:13:24,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506789 conditions, 111682 events. 76357/111682 cut-off events. For 660717/667678 co-relation queries the response was YES. Maximal size of possible extension queue 1653. Compared 766070 event pairs, 37288 based on Foata normal form. 4/92926 useless extension candidates. Maximal degree in co-relation 506753. Up to 76022 conditions per place. [2024-12-02 11:13:24,825 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 164 selfloop transitions, 17 changer transitions 0/195 dead transitions. [2024-12-02 11:13:24,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 195 transitions, 1939 flow [2024-12-02 11:13:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:13:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:13:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-12-02 11:13:24,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6010928961748634 [2024-12-02 11:13:24,827 INFO L175 Difference]: Start difference. First operand has 117 places, 164 transitions, 1310 flow. Second operand 3 states and 110 transitions. [2024-12-02 11:13:24,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 195 transitions, 1939 flow [2024-12-02 11:13:26,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 195 transitions, 1859 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-12-02 11:13:26,166 INFO L231 Difference]: Finished difference. Result has 119 places, 165 transitions, 1328 flow [2024-12-02 11:13:26,166 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1328, PETRI_PLACES=119, PETRI_TRANSITIONS=165} [2024-12-02 11:13:26,166 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-12-02 11:13:26,166 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 165 transitions, 1328 flow [2024-12-02 11:13:26,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2024-12-02 11:13:26,167 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:13:26,167 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-12-02 11:13:26,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 11:13:26,167 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:13:26,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:13:26,167 INFO L85 PathProgramCache]: Analyzing trace with hash 327355467, now seen corresponding path program 1 times [2024-12-02 11:13:26,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:13:26,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956629290] [2024-12-02 11:13:26,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:13:26,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:13:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:13:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:13:26,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:13:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956629290] [2024-12-02 11:13:26,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956629290] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:13:26,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:13:26,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 11:13:26,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997877578] [2024-12-02 11:13:26,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:13:26,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:13:26,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:13:26,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:13:26,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:13:26,272 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-12-02 11:13:26,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 165 transitions, 1328 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2024-12-02 11:13:26,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:13:26,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-12-02 11:13:26,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:13:36,151 INFO L124 PetriNetUnfolderBase]: 64422/100482 cut-off events. [2024-12-02 11:13:36,151 INFO L125 PetriNetUnfolderBase]: For 391695/398884 co-relation queries the response was YES. [2024-12-02 11:13:36,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387055 conditions, 100482 events. 64422/100482 cut-off events. For 391695/398884 co-relation queries the response was YES. Maximal size of possible extension queue 1555. Compared 764344 event pairs, 40341 based on Foata normal form. 217/82019 useless extension candidates. Maximal degree in co-relation 387018. Up to 73446 conditions per place. [2024-12-02 11:13:36,850 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 123 selfloop transitions, 11 changer transitions 75/229 dead transitions. [2024-12-02 11:13:36,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 229 transitions, 2240 flow [2024-12-02 11:13:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 11:13:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 11:13:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2024-12-02 11:13:36,852 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5860655737704918 [2024-12-02 11:13:36,852 INFO L175 Difference]: Start difference. First operand has 119 places, 165 transitions, 1328 flow. Second operand 4 states and 143 transitions. [2024-12-02 11:13:36,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 229 transitions, 2240 flow [2024-12-02 11:13:38,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 229 transitions, 2198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:13:38,278 INFO L231 Difference]: Finished difference. Result has 121 places, 154 transitions, 1207 flow [2024-12-02 11:13:38,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1207, PETRI_PLACES=121, PETRI_TRANSITIONS=154} [2024-12-02 11:13:38,279 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-12-02 11:13:38,279 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 154 transitions, 1207 flow [2024-12-02 11:13:38,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2024-12-02 11:13:38,279 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:13:38,280 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-12-02 11:13:38,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 11:13:38,280 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:13:38,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:13:38,281 INFO L85 PathProgramCache]: Analyzing trace with hash 180325852, now seen corresponding path program 1 times [2024-12-02 11:13:38,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:13:38,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111299703] [2024-12-02 11:13:38,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:13:38,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:13:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:13:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 11:13:38,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:13:38,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111299703] [2024-12-02 11:13:38,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111299703] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:13:38,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405810729] [2024-12-02 11:13:38,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:13:38,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:13:38,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:13:38,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:13:38,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 11:13:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:13:38,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 11:13:38,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:13:38,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-12-02 11:13:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:13:39,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:13:39,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-12-02 11:13:39,719 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 11:13:39,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-12-02 11:13:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:13:39,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405810729] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:13:39,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:13:39,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2024-12-02 11:13:39,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323720111] [2024-12-02 11:13:39,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:13:39,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 11:13:39,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:13:39,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 11:13:39,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-12-02 11:13:39,765 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-12-02 11:13:39,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 154 transitions, 1207 flow. Second operand has 21 states, 21 states have (on average 24.857142857142858) internal successors, (522), 21 states have internal predecessors, (522), 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) [2024-12-02 11:13:39,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:13:39,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-12-02 11:13:39,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:14:08,861 INFO L124 PetriNetUnfolderBase]: 188285/288188 cut-off events. [2024-12-02 11:14:08,861 INFO L125 PetriNetUnfolderBase]: For 1150815/1171865 co-relation queries the response was YES. [2024-12-02 11:14:10,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1118301 conditions, 288188 events. 188285/288188 cut-off events. For 1150815/1171865 co-relation queries the response was YES. Maximal size of possible extension queue 5652. Compared 2428792 event pairs, 29730 based on Foata normal form. 205/232524 useless extension candidates. Maximal degree in co-relation 1118263. Up to 68038 conditions per place. [2024-12-02 11:14:11,330 INFO L140 encePairwiseOnDemand]: 43/61 looper letters, 492 selfloop transitions, 198 changer transitions 15/725 dead transitions. [2024-12-02 11:14:11,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 725 transitions, 7101 flow [2024-12-02 11:14:11,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 11:14:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-12-02 11:14:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1048 transitions. [2024-12-02 11:14:11,333 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5368852459016393 [2024-12-02 11:14:11,334 INFO L175 Difference]: Start difference. First operand has 121 places, 154 transitions, 1207 flow. Second operand 32 states and 1048 transitions. [2024-12-02 11:14:11,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 725 transitions, 7101 flow [2024-12-02 11:14:14,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 725 transitions, 7062 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-12-02 11:14:14,121 INFO L231 Difference]: Finished difference. Result has 157 places, 342 transitions, 3528 flow [2024-12-02 11:14:14,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3528, PETRI_PLACES=157, PETRI_TRANSITIONS=342} [2024-12-02 11:14:14,121 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-12-02 11:14:14,121 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 342 transitions, 3528 flow [2024-12-02 11:14:14,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 24.857142857142858) internal successors, (522), 21 states have internal predecessors, (522), 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) [2024-12-02 11:14:14,122 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:14:14,122 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-12-02 11:14:14,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-12-02 11:14:14,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 11:14:14,322 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 11:14:14,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:14:14,323 INFO L85 PathProgramCache]: Analyzing trace with hash -576808659, now seen corresponding path program 2 times [2024-12-02 11:14:14,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:14:14,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868753678] [2024-12-02 11:14:14,323 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:14:14,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:14:14,384 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:14:14,384 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:14:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:14:15,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:14:15,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868753678] [2024-12-02 11:14:15,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868753678] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:14:15,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146708785] [2024-12-02 11:14:15,379 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:14:15,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:14:15,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:14:15,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:14:15,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e557ee-3c3a-4579-afbf-8c0e9023b522/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 11:14:15,474 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:14:15,474 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:14:15,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 11:14:15,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:14:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:14:15,607 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:14:15,647 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 11:14:15,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-12-02 11:14:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 11:14:15,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146708785] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:14:15,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:14:15,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2024-12-02 11:14:15,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376413490] [2024-12-02 11:14:15,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:14:15,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 11:14:15,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:14:15,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 11:14:15,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-12-02 11:14:15,729 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-12-02 11:14:15,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 342 transitions, 3528 flow. Second operand has 21 states, 21 states have (on average 24.095238095238095) internal successors, (506), 21 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) [2024-12-02 11:14:15,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:14:15,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-12-02 11:14:15,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand