./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 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/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_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu --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 0.2.3-dev-9bd2c7f [2023-11-19 07:35:48,653 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:35:48,762 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:35:48,774 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:35:48,775 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:35:48,811 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:35:48,813 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:35:48,813 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:35:48,814 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:35:48,819 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:35:48,820 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:35:48,821 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:35:48,821 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:35:48,823 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:35:48,823 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:35:48,824 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:35:48,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:35:48,824 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:35:48,825 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:35:48,825 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:35:48,826 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:35:48,826 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:35:48,827 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:35:48,827 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:35:48,827 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:35:48,828 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:35:48,829 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:35:48,829 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:35:48,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:48,830 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:35:48,831 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:35:48,832 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:35:48,832 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:35:48,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:35:48,832 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:35:48,833 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:35:48,833 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:35:48,833 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:35:48,833 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:35:48,834 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2023-11-19 07:35:49,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:35:49,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:35:49,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:35:49,215 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:35:49,215 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:35:49,217 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-19 07:35:52,403 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:35:52,606 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:35:52,607 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-19 07:35:52,618 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/data/b4662af73/e0b2fa840f1841d0bc5d949563f168d1/FLAG1f9578c07 [2023-11-19 07:35:52,633 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/data/b4662af73/e0b2fa840f1841d0bc5d949563f168d1 [2023-11-19 07:35:52,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:35:52,638 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:35:52,640 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:52,640 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:35:52,646 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:35:52,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:52" (1/1) ... [2023-11-19 07:35:52,648 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dacfb7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:52, skipping insertion in model container [2023-11-19 07:35:52,648 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:52" (1/1) ... [2023-11-19 07:35:52,717 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:35:52,941 WARN L240 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_8aa597cb-263c-43af-b6f7-39010488ed1e/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2023-11-19 07:35:52,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:52,962 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:35:52,996 WARN L240 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_8aa597cb-263c-43af-b6f7-39010488ed1e/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2023-11-19 07:35:53,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:53,013 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:35:53,013 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:35:53,021 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:35:53,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53 WrapperNode [2023-11-19 07:35:53,022 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:53,023 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:53,023 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:35:53,023 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:35:53,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (1/1) ... [2023-11-19 07:35:53,042 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (1/1) ... [2023-11-19 07:35:53,102 INFO L138 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 352 [2023-11-19 07:35:53,115 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:53,116 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:35:53,116 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:35:53,116 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:35:53,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (1/1) ... [2023-11-19 07:35:53,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (1/1) ... [2023-11-19 07:35:53,132 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (1/1) ... [2023-11-19 07:35:53,133 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (1/1) ... [2023-11-19 07:35:53,147 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (1/1) ... [2023-11-19 07:35:53,153 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (1/1) ... [2023-11-19 07:35:53,156 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (1/1) ... [2023-11-19 07:35:53,159 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (1/1) ... [2023-11-19 07:35:53,164 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:35:53,165 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:35:53,165 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:35:53,166 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:35:53,166 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (1/1) ... [2023-11-19 07:35:53,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:53,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:53,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:35:53,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:35:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:35:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:35:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:35:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:35:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:35:53,268 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:35:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:35:53,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:35:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:35:53,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:35:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:35:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:35:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:35:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:35:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:35:53,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:35:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:35:53,272 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:35:53,445 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:35:53,448 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:35:54,115 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:35:54,327 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:35:54,327 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:35:54,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:54 BoogieIcfgContainer [2023-11-19 07:35:54,333 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:35:54,336 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:35:54,336 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:35:54,340 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:35:54,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:52" (1/3) ... [2023-11-19 07:35:54,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c583736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:54, skipping insertion in model container [2023-11-19 07:35:54,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:53" (2/3) ... [2023-11-19 07:35:54,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c583736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:54, skipping insertion in model container [2023-11-19 07:35:54,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:54" (3/3) ... [2023-11-19 07:35:54,343 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2023-11-19 07:35:54,354 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:35:54,367 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:35:54,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:35:54,367 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:35:54,486 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:35:54,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 286 transitions, 593 flow [2023-11-19 07:35:54,849 INFO L124 PetriNetUnfolderBase]: 27/283 cut-off events. [2023-11-19 07:35:54,849 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:35:54,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 283 events. 27/283 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 241. Up to 6 conditions per place. [2023-11-19 07:35:54,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 286 transitions, 593 flow [2023-11-19 07:35:54,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 255 places, 272 transitions, 562 flow [2023-11-19 07:35:54,867 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:54,877 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 255 places, 272 transitions, 562 flow [2023-11-19 07:35:54,880 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 255 places, 272 transitions, 562 flow [2023-11-19 07:35:54,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 272 transitions, 562 flow [2023-11-19 07:35:54,936 INFO L124 PetriNetUnfolderBase]: 27/272 cut-off events. [2023-11-19 07:35:54,936 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:35:54,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 272 events. 27/272 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 241. Up to 6 conditions per place. [2023-11-19 07:35:54,941 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-11-19 07:36:07,549 INFO L134 LiptonReduction]: Checked pairs total: 2578 [2023-11-19 07:36:07,549 INFO L136 LiptonReduction]: Total number of compositions: 303 [2023-11-19 07:36:07,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:07,575 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@6ad34b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:07,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:36:07,584 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:36:07,585 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2023-11-19 07:36:07,585 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:36:07,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:07,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:07,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:36:07,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:07,592 INFO L85 PathProgramCache]: Analyzing trace with hash 247648784, now seen corresponding path program 1 times [2023-11-19 07:36:07,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:07,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816265105] [2023-11-19 07:36:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:07,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:08,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:08,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816265105] [2023-11-19 07:36:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816265105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:08,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:08,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073003774] [2023-11-19 07:36:08,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:08,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:08,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:08,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 589 [2023-11-19 07:36:08,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 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) [2023-11-19 07:36:08,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:08,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 589 [2023-11-19 07:36:08,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:08,472 INFO L124 PetriNetUnfolderBase]: 164/251 cut-off events. [2023-11-19 07:36:08,473 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-19 07:36:08,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 251 events. 164/251 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 603 event pairs, 37 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 376. Up to 167 conditions per place. [2023-11-19 07:36:08,479 INFO L140 encePairwiseOnDemand]: 584/589 looper letters, 36 selfloop transitions, 4 changer transitions 1/41 dead transitions. [2023-11-19 07:36:08,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 41 transitions, 197 flow [2023-11-19 07:36:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 810 transitions. [2023-11-19 07:36:08,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45840407470288624 [2023-11-19 07:36:08,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 810 transitions. [2023-11-19 07:36:08,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 810 transitions. [2023-11-19 07:36:08,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:08,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 810 transitions. [2023-11-19 07:36:08,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 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) [2023-11-19 07:36:08,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 589.0) internal successors, (2356), 4 states have internal predecessors, (2356), 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) [2023-11-19 07:36:08,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 589.0) internal successors, (2356), 4 states have internal predecessors, (2356), 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) [2023-11-19 07:36:08,539 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 68 flow. Second operand 3 states and 810 transitions. [2023-11-19 07:36:08,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 41 transitions, 197 flow [2023-11-19 07:36:08,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 175 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:36:08,548 INFO L231 Difference]: Finished difference. Result has 26 places, 28 transitions, 82 flow [2023-11-19 07:36:08,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=28} [2023-11-19 07:36:08,559 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-11-19 07:36:08,559 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 28 transitions, 82 flow [2023-11-19 07:36:08,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 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) [2023-11-19 07:36:08,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:08,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:08,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:36:08,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:36:08,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1224416106, now seen corresponding path program 1 times [2023-11-19 07:36:08,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:08,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069835154] [2023-11-19 07:36:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:08,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:08,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:08,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069835154] [2023-11-19 07:36:08,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069835154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:08,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:08,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:36:08,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704288419] [2023-11-19 07:36:08,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:08,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:08,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:08,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:09,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 589 [2023-11-19 07:36:09,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 28 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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) [2023-11-19 07:36:09,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:09,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 589 [2023-11-19 07:36:09,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:09,190 INFO L124 PetriNetUnfolderBase]: 146/229 cut-off events. [2023-11-19 07:36:09,191 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-19 07:36:09,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 229 events. 146/229 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 553 event pairs, 37 based on Foata normal form. 14/240 useless extension candidates. Maximal degree in co-relation 175. Up to 145 conditions per place. [2023-11-19 07:36:09,194 INFO L140 encePairwiseOnDemand]: 585/589 looper letters, 34 selfloop transitions, 3 changer transitions 1/38 dead transitions. [2023-11-19 07:36:09,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 179 flow [2023-11-19 07:36:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 792 transitions. [2023-11-19 07:36:09,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44821731748726656 [2023-11-19 07:36:09,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 792 transitions. [2023-11-19 07:36:09,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 792 transitions. [2023-11-19 07:36:09,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:09,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 792 transitions. [2023-11-19 07:36:09,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 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) [2023-11-19 07:36:09,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 589.0) internal successors, (2356), 4 states have internal predecessors, (2356), 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) [2023-11-19 07:36:09,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 589.0) internal successors, (2356), 4 states have internal predecessors, (2356), 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) [2023-11-19 07:36:09,212 INFO L175 Difference]: Start difference. First operand has 26 places, 28 transitions, 82 flow. Second operand 3 states and 792 transitions. [2023-11-19 07:36:09,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 179 flow [2023-11-19 07:36:09,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 38 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:09,215 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-11-19 07:36:09,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-19 07:36:09,216 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-19 07:36:09,217 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-11-19 07:36:09,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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) [2023-11-19 07:36:09,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:09,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:09,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:36:09,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:36:09,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:09,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1438685769, now seen corresponding path program 1 times [2023-11-19 07:36:09,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:09,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399124687] [2023-11-19 07:36:09,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:09,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:09,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:09,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399124687] [2023-11-19 07:36:09,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399124687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:09,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:09,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:09,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158790052] [2023-11-19 07:36:09,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:09,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:36:09,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:09,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:36:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:36:09,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 589 [2023-11-19 07:36:09,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 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) [2023-11-19 07:36:09,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:09,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 589 [2023-11-19 07:36:09,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:09,899 INFO L124 PetriNetUnfolderBase]: 263/429 cut-off events. [2023-11-19 07:36:09,899 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-11-19 07:36:09,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050 conditions, 429 events. 263/429 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1301 event pairs, 174 based on Foata normal form. 28/451 useless extension candidates. Maximal degree in co-relation 350. Up to 242 conditions per place. [2023-11-19 07:36:09,903 INFO L140 encePairwiseOnDemand]: 584/589 looper letters, 47 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-11-19 07:36:09,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 51 transitions, 246 flow [2023-11-19 07:36:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:36:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:36:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 993 transitions. [2023-11-19 07:36:09,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42147707979626486 [2023-11-19 07:36:09,909 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 993 transitions. [2023-11-19 07:36:09,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 993 transitions. [2023-11-19 07:36:09,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:09,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 993 transitions. [2023-11-19 07:36:09,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 248.25) internal successors, (993), 4 states have internal predecessors, (993), 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) [2023-11-19 07:36:09,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 589.0) internal successors, (2945), 5 states have internal predecessors, (2945), 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) [2023-11-19 07:36:09,922 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 589.0) internal successors, (2945), 5 states have internal predecessors, (2945), 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) [2023-11-19 07:36:09,922 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 4 states and 993 transitions. [2023-11-19 07:36:09,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 51 transitions, 246 flow [2023-11-19 07:36:09,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 51 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:36:09,925 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 105 flow [2023-11-19 07:36:09,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2023-11-19 07:36:09,926 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-19 07:36:09,926 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 105 flow [2023-11-19 07:36:09,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 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) [2023-11-19 07:36:09,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:09,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:09,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:36:09,928 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:36:09,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash 282447204, now seen corresponding path program 1 times [2023-11-19 07:36:09,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:09,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922226163] [2023-11-19 07:36:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:09,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:10,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:10,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922226163] [2023-11-19 07:36:10,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922226163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:10,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:10,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:10,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433592121] [2023-11-19 07:36:10,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:10,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:36:10,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:36:10,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:36:10,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 589 [2023-11-19 07:36:10,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2023-11-19 07:36:10,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:10,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 589 [2023-11-19 07:36:10,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:10,308 INFO L124 PetriNetUnfolderBase]: 261/441 cut-off events. [2023-11-19 07:36:10,308 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2023-11-19 07:36:10,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1097 conditions, 441 events. 261/441 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1355 event pairs, 114 based on Foata normal form. 44/480 useless extension candidates. Maximal degree in co-relation 908. Up to 253 conditions per place. [2023-11-19 07:36:10,312 INFO L140 encePairwiseOnDemand]: 586/589 looper letters, 49 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-11-19 07:36:10,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 53 transitions, 278 flow [2023-11-19 07:36:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:36:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:36:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1051 transitions. [2023-11-19 07:36:10,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44609507640067914 [2023-11-19 07:36:10,317 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1051 transitions. [2023-11-19 07:36:10,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1051 transitions. [2023-11-19 07:36:10,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:10,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1051 transitions. [2023-11-19 07:36:10,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 262.75) internal successors, (1051), 4 states have internal predecessors, (1051), 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) [2023-11-19 07:36:10,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 589.0) internal successors, (2945), 5 states have internal predecessors, (2945), 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) [2023-11-19 07:36:10,329 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 589.0) internal successors, (2945), 5 states have internal predecessors, (2945), 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) [2023-11-19 07:36:10,329 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 105 flow. Second operand 4 states and 1051 transitions. [2023-11-19 07:36:10,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 53 transitions, 278 flow [2023-11-19 07:36:10,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 262 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:10,335 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 104 flow [2023-11-19 07:36:10,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-11-19 07:36:10,337 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-11-19 07:36:10,338 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 104 flow [2023-11-19 07:36:10,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2023-11-19 07:36:10,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:10,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:10,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:36:10,339 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:36:10,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2022397009, now seen corresponding path program 1 times [2023-11-19 07:36:10,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:10,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303288707] [2023-11-19 07:36:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:10,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:10,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:10,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303288707] [2023-11-19 07:36:10,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303288707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:10,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927319743] [2023-11-19 07:36:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:10,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:10,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:10,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:10,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:36:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:10,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:36:10,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:10,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:11,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927319743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:11,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:11,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-19 07:36:11,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239356196] [2023-11-19 07:36:11,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:11,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:36:11,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:11,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:36:11,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:11,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 589 [2023-11-19 07:36:11,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 259.0) internal successors, (1554), 6 states have internal predecessors, (1554), 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) [2023-11-19 07:36:11,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:11,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 589 [2023-11-19 07:36:11,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:11,523 INFO L124 PetriNetUnfolderBase]: 222/357 cut-off events. [2023-11-19 07:36:11,523 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-11-19 07:36:11,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 357 events. 222/357 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 971 event pairs, 93 based on Foata normal form. 1/355 useless extension candidates. Maximal degree in co-relation 913. Up to 189 conditions per place. [2023-11-19 07:36:11,526 INFO L140 encePairwiseOnDemand]: 586/589 looper letters, 31 selfloop transitions, 2 changer transitions 6/39 dead transitions. [2023-11-19 07:36:11,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 207 flow [2023-11-19 07:36:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:11,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2023-11-19 07:36:11,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4487832484436899 [2023-11-19 07:36:11,531 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2023-11-19 07:36:11,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2023-11-19 07:36:11,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:11,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2023-11-19 07:36:11,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 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) [2023-11-19 07:36:11,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 589.0) internal successors, (2356), 4 states have internal predecessors, (2356), 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) [2023-11-19 07:36:11,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 589.0) internal successors, (2356), 4 states have internal predecessors, (2356), 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) [2023-11-19 07:36:11,541 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 104 flow. Second operand 3 states and 793 transitions. [2023-11-19 07:36:11,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 207 flow [2023-11-19 07:36:11,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 203 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:36:11,544 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 108 flow [2023-11-19 07:36:11,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-11-19 07:36:11,545 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-11-19 07:36:11,545 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 108 flow [2023-11-19 07:36:11,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 259.0) internal successors, (1554), 6 states have internal predecessors, (1554), 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) [2023-11-19 07:36:11,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:11,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:11,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:11,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:11,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:36:11,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:11,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1038680965, now seen corresponding path program 1 times [2023-11-19 07:36:11,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:11,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474123070] [2023-11-19 07:36:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:11,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:13,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:13,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474123070] [2023-11-19 07:36:13,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474123070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:13,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871891488] [2023-11-19 07:36:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:13,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:13,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:13,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:13,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:36:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:13,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:36:13,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:13,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:15,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:36:15,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 314 treesize of output 429 [2023-11-19 07:36:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:21,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871891488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:21,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:21,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-11-19 07:36:21,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702360035] [2023-11-19 07:36:21,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:21,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:36:21,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:21,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:36:21,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:36:22,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 589 [2023-11-19 07:36:22,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 108 flow. Second operand has 15 states, 15 states have (on average 199.4) internal successors, (2991), 15 states have internal predecessors, (2991), 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) [2023-11-19 07:36:22,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:22,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 589 [2023-11-19 07:36:22,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:23,995 INFO L124 PetriNetUnfolderBase]: 597/955 cut-off events. [2023-11-19 07:36:23,995 INFO L125 PetriNetUnfolderBase]: For 435/435 co-relation queries the response was YES. [2023-11-19 07:36:23,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2446 conditions, 955 events. 597/955 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3698 event pairs, 74 based on Foata normal form. 31/978 useless extension candidates. Maximal degree in co-relation 2039. Up to 305 conditions per place. [2023-11-19 07:36:24,001 INFO L140 encePairwiseOnDemand]: 579/589 looper letters, 90 selfloop transitions, 25 changer transitions 29/144 dead transitions. [2023-11-19 07:36:24,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 144 transitions, 729 flow [2023-11-19 07:36:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:36:24,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:36:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2878 transitions. [2023-11-19 07:36:24,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3490177055542081 [2023-11-19 07:36:24,015 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2878 transitions. [2023-11-19 07:36:24,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2878 transitions. [2023-11-19 07:36:24,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:24,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2878 transitions. [2023-11-19 07:36:24,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 205.57142857142858) internal successors, (2878), 14 states have internal predecessors, (2878), 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) [2023-11-19 07:36:24,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 589.0) internal successors, (8835), 15 states have internal predecessors, (8835), 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) [2023-11-19 07:36:24,045 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 589.0) internal successors, (8835), 15 states have internal predecessors, (8835), 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) [2023-11-19 07:36:24,045 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 108 flow. Second operand 14 states and 2878 transitions. [2023-11-19 07:36:24,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 144 transitions, 729 flow [2023-11-19 07:36:24,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 144 transitions, 723 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:36:24,051 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 305 flow [2023-11-19 07:36:24,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=305, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-11-19 07:36:24,054 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2023-11-19 07:36:24,054 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 305 flow [2023-11-19 07:36:24,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 199.4) internal successors, (2991), 15 states have internal predecessors, (2991), 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) [2023-11-19 07:36:24,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:24,056 INFO L208 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] [2023-11-19 07:36:24,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:24,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:24,272 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:36:24,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:24,273 INFO L85 PathProgramCache]: Analyzing trace with hash 653690636, now seen corresponding path program 2 times [2023-11-19 07:36:24,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:24,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687480464] [2023-11-19 07:36:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:24,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:36:24,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:24,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687480464] [2023-11-19 07:36:24,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687480464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:24,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952999522] [2023-11-19 07:36:24,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:36:24,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:24,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:24,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:24,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:36:24,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:24,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:24,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:36:24,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:25,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:27,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:36:27,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 370 treesize of output 485 [2023-11-19 07:36:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:31,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952999522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:31,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:31,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-19 07:36:31,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403719024] [2023-11-19 07:36:31,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:31,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:36:31,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:31,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:36:31,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:36:32,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 589 [2023-11-19 07:36:32,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 305 flow. Second operand has 16 states, 16 states have (on average 200.9375) internal successors, (3215), 16 states have internal predecessors, (3215), 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) [2023-11-19 07:36:32,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:32,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 589 [2023-11-19 07:36:32,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:35,637 INFO L124 PetriNetUnfolderBase]: 1672/2797 cut-off events. [2023-11-19 07:36:35,637 INFO L125 PetriNetUnfolderBase]: For 2603/2603 co-relation queries the response was YES. [2023-11-19 07:36:35,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7924 conditions, 2797 events. 1672/2797 cut-off events. For 2603/2603 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14712 event pairs, 434 based on Foata normal form. 182/2965 useless extension candidates. Maximal degree in co-relation 7494. Up to 706 conditions per place. [2023-11-19 07:36:35,655 INFO L140 encePairwiseOnDemand]: 579/589 looper letters, 199 selfloop transitions, 51 changer transitions 77/327 dead transitions. [2023-11-19 07:36:35,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 327 transitions, 1954 flow [2023-11-19 07:36:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 07:36:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-19 07:36:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5815 transitions. [2023-11-19 07:36:35,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35259519767159836 [2023-11-19 07:36:35,678 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5815 transitions. [2023-11-19 07:36:35,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5815 transitions. [2023-11-19 07:36:35,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:35,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5815 transitions. [2023-11-19 07:36:35,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 207.67857142857142) internal successors, (5815), 28 states have internal predecessors, (5815), 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) [2023-11-19 07:36:35,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 589.0) internal successors, (17081), 29 states have internal predecessors, (17081), 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) [2023-11-19 07:36:35,742 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 589.0) internal successors, (17081), 29 states have internal predecessors, (17081), 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) [2023-11-19 07:36:35,742 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 305 flow. Second operand 28 states and 5815 transitions. [2023-11-19 07:36:35,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 327 transitions, 1954 flow [2023-11-19 07:36:35,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 327 transitions, 1847 flow, removed 45 selfloop flow, removed 3 redundant places. [2023-11-19 07:36:35,771 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 737 flow [2023-11-19 07:36:35,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=737, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2023-11-19 07:36:35,772 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2023-11-19 07:36:35,773 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 737 flow [2023-11-19 07:36:35,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 200.9375) internal successors, (3215), 16 states have internal predecessors, (3215), 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) [2023-11-19 07:36:35,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:35,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:35,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:35,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa597cb-263c-43af-b6f7-39010488ed1e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:35,992 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:36:35,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:35,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1343457321, now seen corresponding path program 1 times [2023-11-19 07:36:35,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:35,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904251207] [2023-11-19 07:36:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat