./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/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_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/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_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/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 74a086edb560572752b8cbc391425d974c2cbbd7d3553767e0707a5dc02a4897 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:35:07,107 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:35:07,231 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:35:07,238 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:35:07,239 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:35:07,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:35:07,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:35:07,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:35:07,282 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:35:07,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:35:07,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:35:07,289 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:35:07,289 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:35:07,291 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:35:07,292 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:35:07,292 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:35:07,293 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:35:07,293 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:35:07,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:35:07,294 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:35:07,295 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:35:07,295 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:35:07,296 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:35:07,296 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:35:07,296 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:35:07,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:35:07,297 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:35:07,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:35:07,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:07,298 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:35:07,300 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:35:07,300 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:35:07,300 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:35:07,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:35:07,301 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:35:07,301 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:35:07,301 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:35:07,301 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:35:07,301 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:35:07,302 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_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74a086edb560572752b8cbc391425d974c2cbbd7d3553767e0707a5dc02a4897 [2023-11-19 07:35:07,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:35:07,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:35:07,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:35:07,608 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:35:07,612 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:35:07,614 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/fib_safe-5.i [2023-11-19 07:35:10,778 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:35:11,113 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:35:11,114 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/sv-benchmarks/c/pthread/fib_safe-5.i [2023-11-19 07:35:11,131 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/data/e0fc6c132/93243138a6c34f14bcf22c4ae495c29f/FLAGb175cdf8c [2023-11-19 07:35:11,152 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/data/e0fc6c132/93243138a6c34f14bcf22c4ae495c29f [2023-11-19 07:35:11,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:35:11,163 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:35:11,167 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:11,167 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:35:11,174 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:35:11,175 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,176 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@531c909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11, skipping insertion in model container [2023-11-19 07:35:11,176 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,228 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:35:11,524 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_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/sv-benchmarks/c/pthread/fib_safe-5.i[30241,30254] [2023-11-19 07:35:11,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:11,569 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:35:11,634 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_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/sv-benchmarks/c/pthread/fib_safe-5.i[30241,30254] [2023-11-19 07:35:11,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:11,682 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:35:11,682 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:35:11,690 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:35:11,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11 WrapperNode [2023-11-19 07:35:11,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:11,692 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:11,693 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:35:11,693 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:35:11,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,734 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,764 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-19 07:35:11,765 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:11,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:35:11,766 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:35:11,766 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:35:11,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,784 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,788 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,790 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,792 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,808 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:35:11,813 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:35:11,813 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:35:11,813 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:35:11,814 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:11,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:11,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:35:11,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:35:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:35:11,892 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:35:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:35:11,892 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:35:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:35:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:35:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:35:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:35:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:35:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:35:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:35:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:35:11,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:35:11,896 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 07:35:12,038 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:35:12,040 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:35:12,241 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:35:12,252 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:35:12,252 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:35:12,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:12 BoogieIcfgContainer [2023-11-19 07:35:12,256 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:35:12,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:35:12,260 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:35:12,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:35:12,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:11" (1/3) ... [2023-11-19 07:35:12,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaf2818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:12, skipping insertion in model container [2023-11-19 07:35:12,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (2/3) ... [2023-11-19 07:35:12,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaf2818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:12, skipping insertion in model container [2023-11-19 07:35:12,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:12" (3/3) ... [2023-11-19 07:35:12,268 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-5.i [2023-11-19 07:35:12,279 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:35:12,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:35:12,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:35:12,292 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:35:12,358 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:35:12,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 97 transitions, 202 flow [2023-11-19 07:35:12,450 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-19 07:35:12,450 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:35:12,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 95 events. 7/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-11-19 07:35:12,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 97 transitions, 202 flow [2023-11-19 07:35:12,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 95 transitions, 196 flow [2023-11-19 07:35:12,467 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:12,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 95 transitions, 196 flow [2023-11-19 07:35:12,481 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 95 transitions, 196 flow [2023-11-19 07:35:12,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 95 transitions, 196 flow [2023-11-19 07:35:12,518 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-19 07:35:12,518 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:35:12,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 95 events. 7/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-11-19 07:35:12,522 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2023-11-19 07:35:16,414 INFO L134 LiptonReduction]: Checked pairs total: 1542 [2023-11-19 07:35:16,415 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-11-19 07:35:16,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:16,438 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;@1fad53b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:16,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:35:16,443 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:35:16,444 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2023-11-19 07:35:16,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:35:16,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:16,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:35:16,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:16,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1878456515, now seen corresponding path program 1 times [2023-11-19 07:35:16,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:16,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607368578] [2023-11-19 07:35:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:16,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:16,751 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 07:35:16,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:16,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607368578] [2023-11-19 07:35:16,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607368578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:16,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:16,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:35:16,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271577762] [2023-11-19 07:35:16,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:16,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:16,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:16,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:16,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 192 [2023-11-19 07:35:16,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 07:35:16,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:16,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 192 [2023-11-19 07:35:16,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:16,892 INFO L124 PetriNetUnfolderBase]: 97/149 cut-off events. [2023-11-19 07:35:16,892 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:35:16,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 331 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2023-11-19 07:35:16,896 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2023-11-19 07:35:16,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2023-11-19 07:35:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-11-19 07:35:16,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878472222222222 [2023-11-19 07:35:16,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-11-19 07:35:16,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-11-19 07:35:16,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:16,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-11-19 07:35:16,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 07:35:16,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 07:35:16,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 07:35:16,946 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 281 transitions. [2023-11-19 07:35:16,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2023-11-19 07:35:16,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:35:16,951 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2023-11-19 07:35:16,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-11-19 07:35:16,962 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2023-11-19 07:35:16,962 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2023-11-19 07:35:16,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 07:35:16,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:16,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:16,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:35:16,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:16,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1897390208, now seen corresponding path program 1 times [2023-11-19 07:35:16,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:16,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957663742] [2023-11-19 07:35:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:16,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:17,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:17,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957663742] [2023-11-19 07:35:17,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957663742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:17,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551148969] [2023-11-19 07:35:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:17,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:17,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:17,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:17,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:35:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:17,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:35:17,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:17,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:17,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551148969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:17,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:17,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:35:17,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351256337] [2023-11-19 07:35:17,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:17,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:35:17,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:35:17,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:35:17,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-19 07:35:17,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 86.71428571428571) internal successors, (607), 7 states have internal predecessors, (607), 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 07:35:17,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:17,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-19 07:35:17,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:17,562 INFO L124 PetriNetUnfolderBase]: 133/203 cut-off events. [2023-11-19 07:35:17,562 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:35:17,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 448 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2023-11-19 07:35:17,573 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-11-19 07:35:17,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2023-11-19 07:35:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:35:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:35:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 554 transitions. [2023-11-19 07:35:17,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809027777777778 [2023-11-19 07:35:17,579 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 554 transitions. [2023-11-19 07:35:17,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 554 transitions. [2023-11-19 07:35:17,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:17,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 554 transitions. [2023-11-19 07:35:17,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.33333333333333) internal successors, (554), 6 states have internal predecessors, (554), 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 07:35:17,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 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 07:35:17,595 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 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 07:35:17,595 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 554 transitions. [2023-11-19 07:35:17,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2023-11-19 07:35:17,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:35:17,598 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2023-11-19 07:35:17,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-11-19 07:35:17,600 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2023-11-19 07:35:17,600 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2023-11-19 07:35:17,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.71428571428571) internal successors, (607), 7 states have internal predecessors, (607), 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 07:35:17,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:17,601 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:17,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:35:17,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:17,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:17,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:17,803 INFO L85 PathProgramCache]: Analyzing trace with hash -912867331, now seen corresponding path program 2 times [2023-11-19 07:35:17,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:17,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459800095] [2023-11-19 07:35:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:17,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:17,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:17,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459800095] [2023-11-19 07:35:17,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459800095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:17,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32361231] [2023-11-19 07:35:17,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:17,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:17,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:17,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:17,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:35:18,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:18,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:18,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:35:18,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:18,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:18,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32361231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:18,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:18,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:35:18,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114714405] [2023-11-19 07:35:18,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:18,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:35:18,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:35:18,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:35:18,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-19 07:35:18,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 86.38461538461539) internal successors, (1123), 13 states have internal predecessors, (1123), 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 07:35:18,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:18,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-19 07:35:18,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:18,465 INFO L124 PetriNetUnfolderBase]: 241/365 cut-off events. [2023-11-19 07:35:18,465 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-19 07:35:18,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 847 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2023-11-19 07:35:18,471 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2023-11-19 07:35:18,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2023-11-19 07:35:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:35:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:35:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1109 transitions. [2023-11-19 07:35:18,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813368055555556 [2023-11-19 07:35:18,476 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1109 transitions. [2023-11-19 07:35:18,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1109 transitions. [2023-11-19 07:35:18,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:18,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1109 transitions. [2023-11-19 07:35:18,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.41666666666667) internal successors, (1109), 12 states have internal predecessors, (1109), 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 07:35:18,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 192.0) internal successors, (2496), 13 states have internal predecessors, (2496), 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 07:35:18,490 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 192.0) internal successors, (2496), 13 states have internal predecessors, (2496), 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 07:35:18,490 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1109 transitions. [2023-11-19 07:35:18,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2023-11-19 07:35:18,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:35:18,500 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2023-11-19 07:35:18,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2023-11-19 07:35:18,502 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2023-11-19 07:35:18,503 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2023-11-19 07:35:18,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 86.38461538461539) internal successors, (1123), 13 states have internal predecessors, (1123), 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 07:35:18,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:18,505 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:18,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:18,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 07:35:18,725 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:18,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash 32956701, now seen corresponding path program 3 times [2023-11-19 07:35:18,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:18,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123244862] [2023-11-19 07:35:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:18,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:19,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:19,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123244862] [2023-11-19 07:35:19,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123244862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:19,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891992321] [2023-11-19 07:35:19,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:35:19,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:19,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:19,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:35:19,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-19 07:35:19,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:19,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:35:19,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:19,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:19,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891992321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:19,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:19,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2023-11-19 07:35:19,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952222894] [2023-11-19 07:35:19,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:19,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:35:19,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:19,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:35:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:35:19,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-19 07:35:19,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 15 states, 15 states have (on average 86.4) internal successors, (1296), 15 states have internal predecessors, (1296), 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 07:35:19,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:19,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-19 07:35:19,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:19,690 INFO L124 PetriNetUnfolderBase]: 277/419 cut-off events. [2023-11-19 07:35:19,690 INFO L125 PetriNetUnfolderBase]: For 963/963 co-relation queries the response was YES. [2023-11-19 07:35:19,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 419 events. 277/419 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 980 event pairs, 20 based on Foata normal form. 18/345 useless extension candidates. Maximal degree in co-relation 1308. Up to 100 conditions per place. [2023-11-19 07:35:19,696 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 84 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2023-11-19 07:35:19,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 97 transitions, 500 flow [2023-11-19 07:35:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:35:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:35:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1289 transitions. [2023-11-19 07:35:19,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47953869047619047 [2023-11-19 07:35:19,703 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1289 transitions. [2023-11-19 07:35:19,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1289 transitions. [2023-11-19 07:35:19,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:19,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1289 transitions. [2023-11-19 07:35:19,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 92.07142857142857) internal successors, (1289), 14 states have internal predecessors, (1289), 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 07:35:19,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 192.0) internal successors, (2880), 15 states have internal predecessors, (2880), 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 07:35:19,716 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 192.0) internal successors, (2880), 15 states have internal predecessors, (2880), 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 07:35:19,716 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 14 states and 1289 transitions. [2023-11-19 07:35:19,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 97 transitions, 500 flow [2023-11-19 07:35:19,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 97 transitions, 448 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-11-19 07:35:19,723 INFO L231 Difference]: Finished difference. Result has 51 places, 25 transitions, 146 flow [2023-11-19 07:35:19,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=146, PETRI_PLACES=51, PETRI_TRANSITIONS=25} [2023-11-19 07:35:19,724 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 33 predicate places. [2023-11-19 07:35:19,725 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 25 transitions, 146 flow [2023-11-19 07:35:19,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.4) internal successors, (1296), 15 states have internal predecessors, (1296), 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 07:35:19,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:19,726 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:19,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:19,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:19,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:19,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1606619517, now seen corresponding path program 4 times [2023-11-19 07:35:19,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:19,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058416526] [2023-11-19 07:35:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:19,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:20,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:20,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058416526] [2023-11-19 07:35:20,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058416526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:20,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710173389] [2023-11-19 07:35:20,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:35:20,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:20,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:21,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:21,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:35:21,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:35:21,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:21,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-19 07:35:21,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:21,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:22,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710173389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:22,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:22,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-19 07:35:22,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253555488] [2023-11-19 07:35:22,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:22,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-19 07:35:22,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-19 07:35:22,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1336, Unknown=0, NotChecked=0, Total=1640 [2023-11-19 07:35:23,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 192 [2023-11-19 07:35:23,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 25 transitions, 146 flow. Second operand has 41 states, 41 states have (on average 81.3170731707317) internal successors, (3334), 41 states have internal predecessors, (3334), 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 07:35:23,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:23,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 192 [2023-11-19 07:35:23,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:41,908 INFO L124 PetriNetUnfolderBase]: 14803/22212 cut-off events. [2023-11-19 07:35:41,908 INFO L125 PetriNetUnfolderBase]: For 64930/64930 co-relation queries the response was YES. [2023-11-19 07:35:42,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70020 conditions, 22212 events. 14803/22212 cut-off events. For 64930/64930 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 138801 event pairs, 83 based on Foata normal form. 137/16569 useless extension candidates. Maximal degree in co-relation 69996. Up to 4518 conditions per place. [2023-11-19 07:35:42,163 INFO L140 encePairwiseOnDemand]: 187/192 looper letters, 721 selfloop transitions, 1243 changer transitions 0/1964 dead transitions. [2023-11-19 07:35:42,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 1964 transitions, 15108 flow [2023-11-19 07:35:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2023-11-19 07:35:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2023-11-19 07:35:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 14087 transitions. [2023-11-19 07:35:42,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557129917184265 [2023-11-19 07:35:42,204 INFO L72 ComplementDD]: Start complementDD. Operand 161 states and 14087 transitions. [2023-11-19 07:35:42,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 161 states and 14087 transitions. [2023-11-19 07:35:42,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:42,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 161 states and 14087 transitions. [2023-11-19 07:35:42,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 162 states, 161 states have (on average 87.4968944099379) internal successors, (14087), 161 states have internal predecessors, (14087), 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 07:35:42,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 162 states, 162 states have (on average 192.0) internal successors, (31104), 162 states have internal predecessors, (31104), 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 07:35:42,334 INFO L81 ComplementDD]: Finished complementDD. Result has 162 states, 162 states have (on average 192.0) internal successors, (31104), 162 states have internal predecessors, (31104), 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 07:35:42,342 INFO L175 Difference]: Start difference. First operand has 51 places, 25 transitions, 146 flow. Second operand 161 states and 14087 transitions. [2023-11-19 07:35:42,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 1964 transitions, 15108 flow [2023-11-19 07:35:42,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 1964 transitions, 12284 flow, removed 831 selfloop flow, removed 11 redundant places. [2023-11-19 07:35:42,822 INFO L231 Difference]: Finished difference. Result has 222 places, 1269 transitions, 7562 flow [2023-11-19 07:35:42,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=161, PETRI_FLOW=7562, PETRI_PLACES=222, PETRI_TRANSITIONS=1269} [2023-11-19 07:35:42,824 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 204 predicate places. [2023-11-19 07:35:42,824 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 1269 transitions, 7562 flow [2023-11-19 07:35:42,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 81.3170731707317) internal successors, (3334), 41 states have internal predecessors, (3334), 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 07:35:42,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:42,826 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:42,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:43,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:43,035 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:43,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:43,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1665778901, now seen corresponding path program 1 times [2023-11-19 07:35:43,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:43,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045665271] [2023-11-19 07:35:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:43,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:44,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:44,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045665271] [2023-11-19 07:35:44,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045665271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:44,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449475338] [2023-11-19 07:35:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:44,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:44,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:44,123 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:44,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552a499e-e296-4ae4-b9f0-b0a50a60ae7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:35:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:44,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-19 07:35:44,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:44,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:45,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449475338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:45,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:45,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-11-19 07:35:45,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626951417] [2023-11-19 07:35:45,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:45,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-19 07:35:45,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:45,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-19 07:35:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1773, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 07:35:46,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 192 [2023-11-19 07:35:46,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 1269 transitions, 7562 flow. Second operand has 47 states, 47 states have (on average 81.34042553191489) internal successors, (3823), 47 states have internal predecessors, (3823), 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 07:35:46,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:46,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 192 [2023-11-19 07:35:46,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand