./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:23:45,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:23:45,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:23:45,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:23:45,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:23:45,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:23:45,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:23:45,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:23:45,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:23:45,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:23:45,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:23:45,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:23:45,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:23:45,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:23:45,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:23:45,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:23:45,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:23:45,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:23:45,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:23:45,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:23:45,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:23:45,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:23:45,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:23:45,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:23:45,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:23:45,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:23:45,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:23:45,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:23:45,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:23:45,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:23:45,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:23:45,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:23:45,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:23:45,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:23:45,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:23:45,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:23:45,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:23:45,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:23:45,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:23:45,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:23:45,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:23:45,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:23:45,206 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:23:45,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:23:45,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:23:45,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:23:45,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:23:45,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:23:45,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:23:45,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:23:45,210 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:23:45,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:23:45,210 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:23:45,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:23:45,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:23:45,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:23:45,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:23:45,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:23:45,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:23:45,212 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:23:45,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:23:45,212 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:23:45,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:23:45,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:23:45,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:23:45,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:23:45,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:23:45,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:23:45,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:23:45,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:23:45,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:23:45,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:23:45,215 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:23:45,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:23:45,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:23:45,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-11-18 20:23:45,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:23:45,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:23:45,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:23:45,562 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:23:45,563 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:23:45,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-18 20:23:45,657 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/data/1d239ca60/51669a74e29c44ebaf157eb8cb1a9f43/FLAG2a85f861d [2022-11-18 20:23:46,109 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:23:46,121 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-18 20:23:46,128 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/data/1d239ca60/51669a74e29c44ebaf157eb8cb1a9f43/FLAG2a85f861d [2022-11-18 20:23:46,488 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/data/1d239ca60/51669a74e29c44ebaf157eb8cb1a9f43 [2022-11-18 20:23:46,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:23:46,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:23:46,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:23:46,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:23:46,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:23:46,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7ae06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46, skipping insertion in model container [2022-11-18 20:23:46,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:23:46,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:23:46,741 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-18 20:23:46,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:23:46,757 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:23:46,777 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-18 20:23:46,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:23:46,795 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:23:46,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46 WrapperNode [2022-11-18 20:23:46,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:23:46,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:23:46,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:23:46,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:23:46,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,852 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2022-11-18 20:23:46,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:23:46,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:23:46,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:23:46,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:23:46,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,892 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:23:46,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:23:46,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:23:46,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:23:46,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (1/1) ... [2022-11-18 20:23:46,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:23:46,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:23:46,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:23:46,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:23:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:23:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:23:46,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:23:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:23:46,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:23:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:23:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:23:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:23:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:23:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:23:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:23:46,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:23:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:23:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:23:46,987 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:23:47,096 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:23:47,098 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:23:47,298 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:23:47,348 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:23:47,349 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:23:47,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:23:47 BoogieIcfgContainer [2022-11-18 20:23:47,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:23:47,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:23:47,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:23:47,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:23:47,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:23:46" (1/3) ... [2022-11-18 20:23:47,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@936fc80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:23:47, skipping insertion in model container [2022-11-18 20:23:47,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:23:46" (2/3) ... [2022-11-18 20:23:47,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@936fc80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:23:47, skipping insertion in model container [2022-11-18 20:23:47,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:23:47" (3/3) ... [2022-11-18 20:23:47,361 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-11-18 20:23:47,371 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:23:47,382 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:23:47,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:23:47,382 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:23:47,457 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:23:47,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2022-11-18 20:23:47,642 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-11-18 20:23:47,642 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:23:47,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-11-18 20:23:47,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2022-11-18 20:23:47,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2022-11-18 20:23:47,691 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:23:47,699 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@19f6de8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:23:47,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 20:23:47,765 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-11-18 20:23:47,765 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:23:47,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:23:47,766 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:47,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:23:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:47,773 INFO L85 PathProgramCache]: Analyzing trace with hash 8248533, now seen corresponding path program 1 times [2022-11-18 20:23:47,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:47,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146666082] [2022-11-18 20:23:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:47,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:48,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:48,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146666082] [2022-11-18 20:23:48,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146666082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:23:48,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:23:48,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:23:48,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640685299] [2022-11-18 20:23:48,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:23:48,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:23:48,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:48,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:23:48,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:23:48,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2022-11-18 20:23:48,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:48,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:23:48,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2022-11-18 20:23:48,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:23:48,331 INFO L130 PetriNetUnfolder]: 11/107 cut-off events. [2022-11-18 20:23:48,339 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-11-18 20:23:48,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-11-18 20:23:48,344 INFO L137 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2022-11-18 20:23:48,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2022-11-18 20:23:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:23:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:23:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2022-11-18 20:23:48,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2022-11-18 20:23:48,372 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2022-11-18 20:23:48,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2022-11-18 20:23:48,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:23:48,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2022-11-18 20:23:48,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:48,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:48,390 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:48,392 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2022-11-18 20:23:48,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2022-11-18 20:23:48,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:23:48,411 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2022-11-18 20:23:48,414 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2022-11-18 20:23:48,423 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-11-18 20:23:48,423 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2022-11-18 20:23:48,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:48,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:23:48,425 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:48,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:23:48,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:23:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:48,428 INFO L85 PathProgramCache]: Analyzing trace with hash -989012563, now seen corresponding path program 1 times [2022-11-18 20:23:48,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:48,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663111163] [2022-11-18 20:23:48,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:48,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:49,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:49,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663111163] [2022-11-18 20:23:49,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663111163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:23:49,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:23:49,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 20:23:49,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431025487] [2022-11-18 20:23:49,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:23:49,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:23:49,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:49,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:23:49,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:23:49,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-18 20:23:49,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:49,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:23:49,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-18 20:23:49,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:23:50,373 INFO L130 PetriNetUnfolder]: 68/258 cut-off events. [2022-11-18 20:23:50,374 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-18 20:23:50,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 258 events. 68/258 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1049 event pairs, 16 based on Foata normal form. 8/236 useless extension candidates. Maximal degree in co-relation 430. Up to 101 conditions per place. [2022-11-18 20:23:50,377 INFO L137 encePairwiseOnDemand]: 76/89 looper letters, 40 selfloop transitions, 7 changer transitions 11/101 dead transitions. [2022-11-18 20:23:50,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 101 transitions, 330 flow [2022-11-18 20:23:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:23:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 20:23:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 699 transitions. [2022-11-18 20:23:50,383 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6544943820224719 [2022-11-18 20:23:50,383 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 699 transitions. [2022-11-18 20:23:50,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 699 transitions. [2022-11-18 20:23:50,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:23:50,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 699 transitions. [2022-11-18 20:23:50,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.25) internal successors, (699), 12 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:50,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:50,395 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:50,395 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 699 transitions. [2022-11-18 20:23:50,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 101 transitions, 330 flow [2022-11-18 20:23:50,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:23:50,399 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 194 flow [2022-11-18 20:23:50,399 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=194, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2022-11-18 20:23:50,400 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2022-11-18 20:23:50,401 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 194 flow [2022-11-18 20:23:50,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:50,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:23:50,402 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:50,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:23:50,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:23:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1809878765, now seen corresponding path program 2 times [2022-11-18 20:23:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:50,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056108838] [2022-11-18 20:23:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:50,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:51,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:51,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056108838] [2022-11-18 20:23:51,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056108838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:23:51,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:23:51,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 20:23:51,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618473760] [2022-11-18 20:23:51,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:23:51,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:23:51,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:23:51,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:23:51,218 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-18 20:23:51,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 74 transitions, 194 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:51,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:23:51,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-18 20:23:51,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:23:51,973 INFO L130 PetriNetUnfolder]: 65/255 cut-off events. [2022-11-18 20:23:51,973 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2022-11-18 20:23:51,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 255 events. 65/255 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1021 event pairs, 39 based on Foata normal form. 1/251 useless extension candidates. Maximal degree in co-relation 528. Up to 102 conditions per place. [2022-11-18 20:23:51,981 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 41 selfloop transitions, 11 changer transitions 8/103 dead transitions. [2022-11-18 20:23:51,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 103 transitions, 422 flow [2022-11-18 20:23:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:23:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 20:23:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 697 transitions. [2022-11-18 20:23:51,986 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6526217228464419 [2022-11-18 20:23:51,986 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 697 transitions. [2022-11-18 20:23:51,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 697 transitions. [2022-11-18 20:23:51,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:23:51,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 697 transitions. [2022-11-18 20:23:51,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.083333333333336) internal successors, (697), 12 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:51,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:51,996 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:51,996 INFO L175 Difference]: Start difference. First operand has 92 places, 74 transitions, 194 flow. Second operand 12 states and 697 transitions. [2022-11-18 20:23:51,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 103 transitions, 422 flow [2022-11-18 20:23:52,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 103 transitions, 385 flow, removed 11 selfloop flow, removed 9 redundant places. [2022-11-18 20:23:52,003 INFO L231 Difference]: Finished difference. Result has 97 places, 80 transitions, 244 flow [2022-11-18 20:23:52,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=244, PETRI_PLACES=97, PETRI_TRANSITIONS=80} [2022-11-18 20:23:52,005 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 18 predicate places. [2022-11-18 20:23:52,005 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 80 transitions, 244 flow [2022-11-18 20:23:52,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:52,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:23:52,007 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:52,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:23:52,007 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:23:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash 521887829, now seen corresponding path program 3 times [2022-11-18 20:23:52,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:52,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100659753] [2022-11-18 20:23:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:52,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:52,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:52,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100659753] [2022-11-18 20:23:52,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100659753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:23:52,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:23:52,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 20:23:52,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676067805] [2022-11-18 20:23:52,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:23:52,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:23:52,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:52,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:23:52,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:23:52,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-18 20:23:52,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 80 transitions, 244 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:52,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:23:52,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-18 20:23:52,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:23:52,939 INFO L130 PetriNetUnfolder]: 72/299 cut-off events. [2022-11-18 20:23:52,939 INFO L131 PetriNetUnfolder]: For 153/165 co-relation queries the response was YES. [2022-11-18 20:23:52,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 299 events. 72/299 cut-off events. For 153/165 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1363 event pairs, 35 based on Foata normal form. 4/297 useless extension candidates. Maximal degree in co-relation 651. Up to 105 conditions per place. [2022-11-18 20:23:52,942 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 7/112 dead transitions. [2022-11-18 20:23:52,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 112 transitions, 504 flow [2022-11-18 20:23:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:23:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 20:23:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 701 transitions. [2022-11-18 20:23:52,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6563670411985019 [2022-11-18 20:23:52,945 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 701 transitions. [2022-11-18 20:23:52,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 701 transitions. [2022-11-18 20:23:52,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:23:52,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 701 transitions. [2022-11-18 20:23:52,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.416666666666664) internal successors, (701), 12 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:52,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:52,952 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:52,952 INFO L175 Difference]: Start difference. First operand has 97 places, 80 transitions, 244 flow. Second operand 12 states and 701 transitions. [2022-11-18 20:23:52,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 112 transitions, 504 flow [2022-11-18 20:23:52,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 112 transitions, 469 flow, removed 11 selfloop flow, removed 7 redundant places. [2022-11-18 20:23:52,958 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 307 flow [2022-11-18 20:23:52,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=307, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2022-11-18 20:23:52,959 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2022-11-18 20:23:52,960 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 307 flow [2022-11-18 20:23:52,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:52,960 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:23:52,961 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:52,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:23:52,961 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:23:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:52,962 INFO L85 PathProgramCache]: Analyzing trace with hash 751272271, now seen corresponding path program 4 times [2022-11-18 20:23:52,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:52,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538501170] [2022-11-18 20:23:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:52,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:53,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:53,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538501170] [2022-11-18 20:23:53,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538501170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:23:53,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:23:53,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 20:23:53,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448048493] [2022-11-18 20:23:53,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:23:53,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:23:53,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:53,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:23:53,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:23:53,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-18 20:23:53,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:53,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:23:53,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-18 20:23:53,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:23:53,935 INFO L130 PetriNetUnfolder]: 70/297 cut-off events. [2022-11-18 20:23:53,935 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-11-18 20:23:53,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 297 events. 70/297 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1361 event pairs, 40 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 681. Up to 105 conditions per place. [2022-11-18 20:23:53,938 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 46 selfloop transitions, 15 changer transitions 9/113 dead transitions. [2022-11-18 20:23:53,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 113 transitions, 557 flow [2022-11-18 20:23:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:23:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 20:23:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 702 transitions. [2022-11-18 20:23:53,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6573033707865169 [2022-11-18 20:23:53,942 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 702 transitions. [2022-11-18 20:23:53,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 702 transitions. [2022-11-18 20:23:53,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:23:53,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 702 transitions. [2022-11-18 20:23:53,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.5) internal successors, (702), 12 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:53,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:53,949 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:53,949 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 307 flow. Second operand 12 states and 702 transitions. [2022-11-18 20:23:53,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 113 transitions, 557 flow [2022-11-18 20:23:53,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 113 transitions, 516 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-11-18 20:23:53,956 INFO L231 Difference]: Finished difference. Result has 109 places, 85 transitions, 339 flow [2022-11-18 20:23:53,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=339, PETRI_PLACES=109, PETRI_TRANSITIONS=85} [2022-11-18 20:23:53,957 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 30 predicate places. [2022-11-18 20:23:53,958 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 85 transitions, 339 flow [2022-11-18 20:23:53,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:53,959 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:23:53,959 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:53,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:23:53,960 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:23:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:53,965 INFO L85 PathProgramCache]: Analyzing trace with hash -92412107, now seen corresponding path program 5 times [2022-11-18 20:23:53,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:53,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350184567] [2022-11-18 20:23:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:53,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:54,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:54,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350184567] [2022-11-18 20:23:54,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350184567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:23:54,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:23:54,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 20:23:54,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730817390] [2022-11-18 20:23:54,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:23:54,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:23:54,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:54,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:23:54,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:23:54,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-18 20:23:54,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 85 transitions, 339 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:54,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:23:54,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-18 20:23:54,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:23:55,152 INFO L130 PetriNetUnfolder]: 68/274 cut-off events. [2022-11-18 20:23:55,152 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2022-11-18 20:23:55,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 274 events. 68/274 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1187 event pairs, 38 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 647. Up to 105 conditions per place. [2022-11-18 20:23:55,156 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 15 changer transitions 8/108 dead transitions. [2022-11-18 20:23:55,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 108 transitions, 556 flow [2022-11-18 20:23:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:23:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 20:23:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 697 transitions. [2022-11-18 20:23:55,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6526217228464419 [2022-11-18 20:23:55,161 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 697 transitions. [2022-11-18 20:23:55,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 697 transitions. [2022-11-18 20:23:55,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:23:55,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 697 transitions. [2022-11-18 20:23:55,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.083333333333336) internal successors, (697), 12 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:55,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:55,169 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:55,169 INFO L175 Difference]: Start difference. First operand has 109 places, 85 transitions, 339 flow. Second operand 12 states and 697 transitions. [2022-11-18 20:23:55,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 108 transitions, 556 flow [2022-11-18 20:23:55,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 108 transitions, 510 flow, removed 12 selfloop flow, removed 9 redundant places. [2022-11-18 20:23:55,176 INFO L231 Difference]: Finished difference. Result has 112 places, 85 transitions, 346 flow [2022-11-18 20:23:55,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=346, PETRI_PLACES=112, PETRI_TRANSITIONS=85} [2022-11-18 20:23:55,180 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 33 predicate places. [2022-11-18 20:23:55,180 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 85 transitions, 346 flow [2022-11-18 20:23:55,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:55,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:23:55,182 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:55,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:23:55,183 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:23:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:55,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1623942775, now seen corresponding path program 6 times [2022-11-18 20:23:55,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:55,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895743328] [2022-11-18 20:23:55,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:55,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:55,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:55,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895743328] [2022-11-18 20:23:55,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895743328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:23:55,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:23:55,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 20:23:55,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354611084] [2022-11-18 20:23:55,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:23:55,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:23:55,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:55,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:23:55,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:23:55,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-18 20:23:55,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 85 transitions, 346 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:55,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:23:55,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-18 20:23:55,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:23:56,369 INFO L130 PetriNetUnfolder]: 66/239 cut-off events. [2022-11-18 20:23:56,369 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2022-11-18 20:23:56,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 239 events. 66/239 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 893 event pairs, 32 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 585. Up to 105 conditions per place. [2022-11-18 20:23:56,372 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 15 changer transitions 8/100 dead transitions. [2022-11-18 20:23:56,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 100 transitions, 517 flow [2022-11-18 20:23:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:23:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 20:23:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 689 transitions. [2022-11-18 20:23:56,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6451310861423221 [2022-11-18 20:23:56,377 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 689 transitions. [2022-11-18 20:23:56,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 689 transitions. [2022-11-18 20:23:56,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:23:56,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 689 transitions. [2022-11-18 20:23:56,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.416666666666664) internal successors, (689), 12 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:56,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:56,384 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:56,384 INFO L175 Difference]: Start difference. First operand has 112 places, 85 transitions, 346 flow. Second operand 12 states and 689 transitions. [2022-11-18 20:23:56,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 100 transitions, 517 flow [2022-11-18 20:23:56,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 100 transitions, 471 flow, removed 9 selfloop flow, removed 11 redundant places. [2022-11-18 20:23:56,392 INFO L231 Difference]: Finished difference. Result has 112 places, 85 transitions, 348 flow [2022-11-18 20:23:56,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=348, PETRI_PLACES=112, PETRI_TRANSITIONS=85} [2022-11-18 20:23:56,393 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 33 predicate places. [2022-11-18 20:23:56,394 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 85 transitions, 348 flow [2022-11-18 20:23:56,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:56,395 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:23:56,396 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:56,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:23:56,396 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:23:56,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:56,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1492579821, now seen corresponding path program 1 times [2022-11-18 20:23:56,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:56,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559479554] [2022-11-18 20:23:56,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:56,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:57,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:57,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559479554] [2022-11-18 20:23:57,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559479554] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:23:57,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471972755] [2022-11-18 20:23:57,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:57,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:23:57,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:23:57,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:23:57,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:23:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:23:57,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:23:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:58,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:23:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:58,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471972755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:23:58,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:23:58,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-18 20:23:58,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495983754] [2022-11-18 20:23:58,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:23:58,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:23:58,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:58,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:23:58,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:23:58,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:23:58,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 85 transitions, 348 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:58,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:23:58,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:23:58,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:24:01,913 INFO L130 PetriNetUnfolder]: 168/592 cut-off events. [2022-11-18 20:24:01,913 INFO L131 PetriNetUnfolder]: For 507/507 co-relation queries the response was YES. [2022-11-18 20:24:01,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 592 events. 168/592 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3253 event pairs, 9 based on Foata normal form. 13/605 useless extension candidates. Maximal degree in co-relation 1356. Up to 111 conditions per place. [2022-11-18 20:24:01,919 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2022-11-18 20:24:01,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 251 transitions, 1392 flow [2022-11-18 20:24:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 20:24:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-18 20:24:01,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2022-11-18 20:24:01,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2022-11-18 20:24:01,927 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2022-11-18 20:24:01,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2022-11-18 20:24:01,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:24:01,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2022-11-18 20:24:01,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:01,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:01,948 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:01,949 INFO L175 Difference]: Start difference. First operand has 112 places, 85 transitions, 348 flow. Second operand 48 states and 2702 transitions. [2022-11-18 20:24:01,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 251 transitions, 1392 flow [2022-11-18 20:24:01,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1258 flow, removed 42 selfloop flow, removed 14 redundant places. [2022-11-18 20:24:01,957 INFO L231 Difference]: Finished difference. Result has 152 places, 152 transitions, 782 flow [2022-11-18 20:24:01,957 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=782, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2022-11-18 20:24:01,960 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2022-11-18 20:24:01,961 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 782 flow [2022-11-18 20:24:01,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:01,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:24:01,962 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:01,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:02,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:24:02,168 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:24:02,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:02,169 INFO L85 PathProgramCache]: Analyzing trace with hash -748226027, now seen corresponding path program 2 times [2022-11-18 20:24:02,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:02,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057973155] [2022-11-18 20:24:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:02,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:02,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:02,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057973155] [2022-11-18 20:24:02,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057973155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:02,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451397014] [2022-11-18 20:24:02,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:24:02,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:02,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:02,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:24:03,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:24:03,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:03,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:24:03,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:03,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:04,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451397014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:04,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:04,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-18 20:24:04,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165150195] [2022-11-18 20:24:04,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:04,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:24:04,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:04,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:24:04,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:24:04,419 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:24:04,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 782 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:04,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:24:04,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:24:04,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:24:06,542 INFO L130 PetriNetUnfolder]: 210/758 cut-off events. [2022-11-18 20:24:06,542 INFO L131 PetriNetUnfolder]: For 753/767 co-relation queries the response was YES. [2022-11-18 20:24:06,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2137 conditions, 758 events. 210/758 cut-off events. For 753/767 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4631 event pairs, 27 based on Foata normal form. 5/761 useless extension candidates. Maximal degree in co-relation 2112. Up to 213 conditions per place. [2022-11-18 20:24:06,550 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 100 selfloop transitions, 122 changer transitions 6/270 dead transitions. [2022-11-18 20:24:06,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 270 transitions, 1857 flow [2022-11-18 20:24:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:24:06,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-18 20:24:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2022-11-18 20:24:06,555 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2022-11-18 20:24:06,555 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2022-11-18 20:24:06,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2022-11-18 20:24:06,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:24:06,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2022-11-18 20:24:06,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.05128205128205) internal successors, (2186), 39 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:06,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:06,570 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:06,570 INFO L175 Difference]: Start difference. First operand has 152 places, 152 transitions, 782 flow. Second operand 39 states and 2186 transitions. [2022-11-18 20:24:06,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 270 transitions, 1857 flow [2022-11-18 20:24:06,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 1627 flow, removed 102 selfloop flow, removed 9 redundant places. [2022-11-18 20:24:06,584 INFO L231 Difference]: Finished difference. Result has 186 places, 205 transitions, 1273 flow [2022-11-18 20:24:06,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1273, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2022-11-18 20:24:06,585 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 107 predicate places. [2022-11-18 20:24:06,585 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 1273 flow [2022-11-18 20:24:06,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:06,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:24:06,587 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:06,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:06,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:06,793 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:24:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1865169065, now seen corresponding path program 3 times [2022-11-18 20:24:06,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:06,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813329130] [2022-11-18 20:24:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:06,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:07,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:07,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813329130] [2022-11-18 20:24:07,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813329130] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:07,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839846899] [2022-11-18 20:24:07,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:24:07,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:07,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:07,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:07,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:24:07,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:24:07,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:24:07,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:08,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:09,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839846899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:09,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:09,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-18 20:24:09,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817270199] [2022-11-18 20:24:09,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:09,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:24:09,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:09,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:24:09,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:24:09,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:24:09,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 1273 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:09,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:24:09,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:24:09,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:24:15,106 INFO L130 PetriNetUnfolder]: 280/1049 cut-off events. [2022-11-18 20:24:15,106 INFO L131 PetriNetUnfolder]: For 1419/1421 co-relation queries the response was YES. [2022-11-18 20:24:15,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 1049 events. 280/1049 cut-off events. For 1419/1421 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7326 event pairs, 18 based on Foata normal form. 3/1040 useless extension candidates. Maximal degree in co-relation 3148. Up to 147 conditions per place. [2022-11-18 20:24:15,119 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 158 selfloop transitions, 208 changer transitions 6/414 dead transitions. [2022-11-18 20:24:15,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 414 transitions, 3151 flow [2022-11-18 20:24:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-18 20:24:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-18 20:24:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4518 transitions. [2022-11-18 20:24:15,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6267166042446941 [2022-11-18 20:24:15,133 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4518 transitions. [2022-11-18 20:24:15,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4518 transitions. [2022-11-18 20:24:15,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:24:15,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4518 transitions. [2022-11-18 20:24:15,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.77777777777778) internal successors, (4518), 81 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:15,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:15,162 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:15,163 INFO L175 Difference]: Start difference. First operand has 186 places, 205 transitions, 1273 flow. Second operand 81 states and 4518 transitions. [2022-11-18 20:24:15,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 414 transitions, 3151 flow [2022-11-18 20:24:15,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 414 transitions, 3102 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-11-18 20:24:15,185 INFO L231 Difference]: Finished difference. Result has 271 places, 286 transitions, 2345 flow [2022-11-18 20:24:15,186 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2345, PETRI_PLACES=271, PETRI_TRANSITIONS=286} [2022-11-18 20:24:15,186 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 192 predicate places. [2022-11-18 20:24:15,186 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 286 transitions, 2345 flow [2022-11-18 20:24:15,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:15,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:24:15,188 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:15,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:15,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:24:15,395 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:24:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1050485383, now seen corresponding path program 4 times [2022-11-18 20:24:15,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:15,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621599324] [2022-11-18 20:24:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:15,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:15,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:15,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621599324] [2022-11-18 20:24:15,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621599324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:15,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355499106] [2022-11-18 20:24:15,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:24:15,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:15,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:15,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:16,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:24:16,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:24:16,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:16,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:24:16,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:16,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:17,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355499106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:17,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:17,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-18 20:24:17,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175029662] [2022-11-18 20:24:17,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:17,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:24:17,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:17,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:24:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:24:17,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:24:17,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 286 transitions, 2345 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:17,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:24:17,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:24:17,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:24:22,801 INFO L130 PetriNetUnfolder]: 299/1078 cut-off events. [2022-11-18 20:24:22,801 INFO L131 PetriNetUnfolder]: For 4250/4252 co-relation queries the response was YES. [2022-11-18 20:24:22,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 1078 events. 299/1078 cut-off events. For 4250/4252 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7544 event pairs, 22 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 4270. Up to 157 conditions per place. [2022-11-18 20:24:22,823 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 165 selfloop transitions, 232 changer transitions 6/445 dead transitions. [2022-11-18 20:24:22,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 445 transitions, 4319 flow [2022-11-18 20:24:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-18 20:24:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-18 20:24:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4528 transitions. [2022-11-18 20:24:22,850 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6281037591899015 [2022-11-18 20:24:22,851 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4528 transitions. [2022-11-18 20:24:22,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4528 transitions. [2022-11-18 20:24:22,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:24:22,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4528 transitions. [2022-11-18 20:24:22,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.901234567901234) internal successors, (4528), 81 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:22,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:22,890 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:22,890 INFO L175 Difference]: Start difference. First operand has 271 places, 286 transitions, 2345 flow. Second operand 81 states and 4528 transitions. [2022-11-18 20:24:22,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 445 transitions, 4319 flow [2022-11-18 20:24:22,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 445 transitions, 4068 flow, removed 68 selfloop flow, removed 19 redundant places. [2022-11-18 20:24:22,944 INFO L231 Difference]: Finished difference. Result has 337 places, 319 transitions, 3001 flow [2022-11-18 20:24:22,945 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=3001, PETRI_PLACES=337, PETRI_TRANSITIONS=319} [2022-11-18 20:24:22,946 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 258 predicate places. [2022-11-18 20:24:22,946 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 319 transitions, 3001 flow [2022-11-18 20:24:22,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:22,947 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:24:22,948 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:22,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:23,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:24:23,155 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:24:23,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:23,155 INFO L85 PathProgramCache]: Analyzing trace with hash -974553547, now seen corresponding path program 5 times [2022-11-18 20:24:23,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:23,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703827604] [2022-11-18 20:24:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:23,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:23,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:23,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703827604] [2022-11-18 20:24:23,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703827604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:23,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002221243] [2022-11-18 20:24:23,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:24:23,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:23,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:23,688 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:23,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:24:23,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:24:23,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:23,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:24:23,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:24,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:25,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002221243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:25,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:25,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-18 20:24:25,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418364882] [2022-11-18 20:24:25,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:25,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:24:25,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:25,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:24:25,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:24:25,318 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:24:25,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 319 transitions, 3001 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:25,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:24:25,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:24:25,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:24:27,410 INFO L130 PetriNetUnfolder]: 300/1119 cut-off events. [2022-11-18 20:24:27,410 INFO L131 PetriNetUnfolder]: For 6095/6095 co-relation queries the response was YES. [2022-11-18 20:24:27,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4942 conditions, 1119 events. 300/1119 cut-off events. For 6095/6095 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7997 event pairs, 31 based on Foata normal form. 2/1116 useless extension candidates. Maximal degree in co-relation 4888. Up to 387 conditions per place. [2022-11-18 20:24:27,428 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 127 selfloop transitions, 190 changer transitions 12/371 dead transitions. [2022-11-18 20:24:27,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 371 transitions, 4121 flow [2022-11-18 20:24:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 20:24:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-18 20:24:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2022-11-18 20:24:27,434 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2022-11-18 20:24:27,434 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2022-11-18 20:24:27,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2022-11-18 20:24:27,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:24:27,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2022-11-18 20:24:27,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:27,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:27,445 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:27,445 INFO L175 Difference]: Start difference. First operand has 337 places, 319 transitions, 3001 flow. Second operand 33 states and 1827 transitions. [2022-11-18 20:24:27,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 371 transitions, 4121 flow [2022-11-18 20:24:27,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 371 transitions, 3682 flow, removed 46 selfloop flow, removed 56 redundant places. [2022-11-18 20:24:27,508 INFO L231 Difference]: Finished difference. Result has 321 places, 333 transitions, 3319 flow [2022-11-18 20:24:27,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3319, PETRI_PLACES=321, PETRI_TRANSITIONS=333} [2022-11-18 20:24:27,509 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 242 predicate places. [2022-11-18 20:24:27,510 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 333 transitions, 3319 flow [2022-11-18 20:24:27,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:27,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:24:27,511 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:27,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:27,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:24:27,720 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:24:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1819115727, now seen corresponding path program 6 times [2022-11-18 20:24:27,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:27,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050218991] [2022-11-18 20:24:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:27,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:28,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:28,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050218991] [2022-11-18 20:24:28,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050218991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:28,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433342791] [2022-11-18 20:24:28,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:24:28,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:28,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:28,300 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:28,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:24:28,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 20:24:28,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:28,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:24:28,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:29,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:30,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433342791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:30,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:30,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-18 20:24:30,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675021934] [2022-11-18 20:24:30,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:30,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:24:30,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:30,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:24:30,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:24:30,154 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:24:30,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 333 transitions, 3319 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:30,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:24:30,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:24:30,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:24:36,345 INFO L130 PetriNetUnfolder]: 494/1674 cut-off events. [2022-11-18 20:24:36,346 INFO L131 PetriNetUnfolder]: For 10688/10688 co-relation queries the response was YES. [2022-11-18 20:24:36,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8092 conditions, 1674 events. 494/1674 cut-off events. For 10688/10688 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13112 event pairs, 21 based on Foata normal form. 1/1666 useless extension candidates. Maximal degree in co-relation 8027. Up to 414 conditions per place. [2022-11-18 20:24:36,373 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 173 selfloop transitions, 380 changer transitions 6/601 dead transitions. [2022-11-18 20:24:36,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 601 transitions, 7368 flow [2022-11-18 20:24:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-18 20:24:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-11-18 20:24:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3882 transitions. [2022-11-18 20:24:36,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6231139646869984 [2022-11-18 20:24:36,385 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3882 transitions. [2022-11-18 20:24:36,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3882 transitions. [2022-11-18 20:24:36,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:24:36,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3882 transitions. [2022-11-18 20:24:36,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.457142857142856) internal successors, (3882), 70 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:36,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:36,414 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:36,414 INFO L175 Difference]: Start difference. First operand has 321 places, 333 transitions, 3319 flow. Second operand 70 states and 3882 transitions. [2022-11-18 20:24:36,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 601 transitions, 7368 flow [2022-11-18 20:24:36,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 601 transitions, 7000 flow, removed 55 selfloop flow, removed 20 redundant places. [2022-11-18 20:24:36,539 INFO L231 Difference]: Finished difference. Result has 382 places, 526 transitions, 6695 flow [2022-11-18 20:24:36,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=6695, PETRI_PLACES=382, PETRI_TRANSITIONS=526} [2022-11-18 20:24:36,541 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 303 predicate places. [2022-11-18 20:24:36,541 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 526 transitions, 6695 flow [2022-11-18 20:24:36,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:36,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:24:36,543 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:36,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:36,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:24:36,750 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:24:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1266148075, now seen corresponding path program 7 times [2022-11-18 20:24:36,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:36,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720120971] [2022-11-18 20:24:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:37,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:37,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720120971] [2022-11-18 20:24:37,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720120971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:37,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602955799] [2022-11-18 20:24:37,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:24:37,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:37,291 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:37,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:24:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:37,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:24:37,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:38,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:39,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602955799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:39,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:39,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-18 20:24:39,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445975443] [2022-11-18 20:24:39,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:39,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:24:39,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:39,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:24:39,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:24:39,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:24:39,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 526 transitions, 6695 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:39,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:24:39,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:24:39,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:24:46,922 INFO L130 PetriNetUnfolder]: 675/2316 cut-off events. [2022-11-18 20:24:46,922 INFO L131 PetriNetUnfolder]: For 20366/20366 co-relation queries the response was YES. [2022-11-18 20:24:46,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12621 conditions, 2316 events. 675/2316 cut-off events. For 20366/20366 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20164 event pairs, 21 based on Foata normal form. 2/2309 useless extension candidates. Maximal degree in co-relation 12544. Up to 412 conditions per place. [2022-11-18 20:24:46,963 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 191 selfloop transitions, 585 changer transitions 13/831 dead transitions. [2022-11-18 20:24:46,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 831 transitions, 12073 flow [2022-11-18 20:24:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-18 20:24:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-11-18 20:24:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5261 transitions. [2022-11-18 20:24:46,971 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6222353636901242 [2022-11-18 20:24:46,972 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5261 transitions. [2022-11-18 20:24:46,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5261 transitions. [2022-11-18 20:24:46,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:24:46,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5261 transitions. [2022-11-18 20:24:46,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 55.37894736842105) internal successors, (5261), 95 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:46,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 89.0) internal successors, (8544), 96 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:46,999 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 89.0) internal successors, (8544), 96 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:46,999 INFO L175 Difference]: Start difference. First operand has 382 places, 526 transitions, 6695 flow. Second operand 95 states and 5261 transitions. [2022-11-18 20:24:47,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 831 transitions, 12073 flow [2022-11-18 20:24:47,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 831 transitions, 11343 flow, removed 303 selfloop flow, removed 19 redundant places. [2022-11-18 20:24:47,241 INFO L231 Difference]: Finished difference. Result has 475 places, 724 transitions, 10672 flow [2022-11-18 20:24:47,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=6208, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=10672, PETRI_PLACES=475, PETRI_TRANSITIONS=724} [2022-11-18 20:24:47,243 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 396 predicate places. [2022-11-18 20:24:47,243 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 724 transitions, 10672 flow [2022-11-18 20:24:47,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:47,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:24:47,244 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:47,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 20:24:47,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:47,447 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:24:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:47,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1144281925, now seen corresponding path program 8 times [2022-11-18 20:24:47,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:47,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551322975] [2022-11-18 20:24:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:47,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:48,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:48,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551322975] [2022-11-18 20:24:48,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551322975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:48,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434103861] [2022-11-18 20:24:48,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:24:48,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:48,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:48,099 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:48,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:24:48,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:24:48,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:48,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:24:48,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:49,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:49,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434103861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:49,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:49,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-18 20:24:49,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207178963] [2022-11-18 20:24:49,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:49,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:24:49,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:49,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:24:49,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:24:49,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:24:49,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 724 transitions, 10672 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:49,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:24:49,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:24:49,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:24:54,647 INFO L130 PetriNetUnfolder]: 796/2713 cut-off events. [2022-11-18 20:24:54,648 INFO L131 PetriNetUnfolder]: For 36803/36803 co-relation queries the response was YES. [2022-11-18 20:24:54,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16220 conditions, 2713 events. 796/2713 cut-off events. For 36803/36803 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24550 event pairs, 36 based on Foata normal form. 2/2666 useless extension candidates. Maximal degree in co-relation 16126. Up to 554 conditions per place. [2022-11-18 20:24:54,689 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 312 selfloop transitions, 570 changer transitions 12/936 dead transitions. [2022-11-18 20:24:54,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 936 transitions, 15205 flow [2022-11-18 20:24:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-18 20:24:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-18 20:24:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3584 transitions. [2022-11-18 20:24:54,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6292134831460674 [2022-11-18 20:24:54,696 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3584 transitions. [2022-11-18 20:24:54,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3584 transitions. [2022-11-18 20:24:54,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:24:54,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3584 transitions. [2022-11-18 20:24:54,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.0) internal successors, (3584), 64 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:54,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:54,724 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:54,724 INFO L175 Difference]: Start difference. First operand has 475 places, 724 transitions, 10672 flow. Second operand 64 states and 3584 transitions. [2022-11-18 20:24:54,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 936 transitions, 15205 flow [2022-11-18 20:24:55,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 936 transitions, 14223 flow, removed 394 selfloop flow, removed 25 redundant places. [2022-11-18 20:24:55,022 INFO L231 Difference]: Finished difference. Result has 515 places, 844 transitions, 13514 flow [2022-11-18 20:24:55,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=9989, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=456, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=13514, PETRI_PLACES=515, PETRI_TRANSITIONS=844} [2022-11-18 20:24:55,023 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 436 predicate places. [2022-11-18 20:24:55,023 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 844 transitions, 13514 flow [2022-11-18 20:24:55,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:55,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:24:55,023 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:55,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:55,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:55,228 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:24:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash -156948061, now seen corresponding path program 9 times [2022-11-18 20:24:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:55,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636956532] [2022-11-18 20:24:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:55,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:55,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636956532] [2022-11-18 20:24:55,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636956532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:55,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105893617] [2022-11-18 20:24:55,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:24:55,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:55,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:55,743 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:55,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:24:55,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:24:55,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:55,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:24:55,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:56,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:57,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105893617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:57,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:57,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-18 20:24:57,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034833103] [2022-11-18 20:24:57,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:57,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:24:57,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:57,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:24:57,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:24:57,080 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:24:57,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 844 transitions, 13514 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:57,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:24:57,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:24:57,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:24:59,975 INFO L130 PetriNetUnfolder]: 798/2978 cut-off events. [2022-11-18 20:24:59,976 INFO L131 PetriNetUnfolder]: For 44193/44198 co-relation queries the response was YES. [2022-11-18 20:24:59,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17973 conditions, 2978 events. 798/2978 cut-off events. For 44193/44198 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28303 event pairs, 64 based on Foata normal form. 5/2964 useless extension candidates. Maximal degree in co-relation 17876. Up to 1060 conditions per place. [2022-11-18 20:25:00,017 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 350 selfloop transitions, 488 changer transitions 6/886 dead transitions. [2022-11-18 20:25:00,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 886 transitions, 15685 flow [2022-11-18 20:25:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:25:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-18 20:25:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2022-11-18 20:25:00,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6260533707865169 [2022-11-18 20:25:00,021 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2022-11-18 20:25:00,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2022-11-18 20:25:00,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:00,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2022-11-18 20:25:00,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:00,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:00,030 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:00,032 INFO L175 Difference]: Start difference. First operand has 515 places, 844 transitions, 13514 flow. Second operand 32 states and 1783 transitions. [2022-11-18 20:25:00,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 886 transitions, 15685 flow [2022-11-18 20:25:00,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 886 transitions, 15054 flow, removed 95 selfloop flow, removed 31 redundant places. [2022-11-18 20:25:00,463 INFO L231 Difference]: Finished difference. Result has 514 places, 854 transitions, 14563 flow [2022-11-18 20:25:00,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=12913, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14563, PETRI_PLACES=514, PETRI_TRANSITIONS=854} [2022-11-18 20:25:00,464 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 435 predicate places. [2022-11-18 20:25:00,464 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 854 transitions, 14563 flow [2022-11-18 20:25:00,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:00,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:00,465 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:00,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:00,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:25:00,665 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:00,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:00,666 INFO L85 PathProgramCache]: Analyzing trace with hash -937348191, now seen corresponding path program 10 times [2022-11-18 20:25:00,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:00,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231164257] [2022-11-18 20:25:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:00,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:01,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:01,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231164257] [2022-11-18 20:25:01,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231164257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:01,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621893125] [2022-11-18 20:25:01,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:25:01,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:01,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:01,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:01,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:25:01,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:25:01,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:01,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:25:01,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:01,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:02,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621893125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:02,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:02,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-18 20:25:02,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123080230] [2022-11-18 20:25:02,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:02,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:25:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:02,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:25:02,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:25:02,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:25:02,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 854 transitions, 14563 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:02,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:02,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:25:02,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:04,922 INFO L130 PetriNetUnfolder]: 798/2956 cut-off events. [2022-11-18 20:25:04,923 INFO L131 PetriNetUnfolder]: For 39263/39275 co-relation queries the response was YES. [2022-11-18 20:25:05,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18137 conditions, 2956 events. 798/2956 cut-off events. For 39263/39275 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27973 event pairs, 94 based on Foata normal form. 4/2936 useless extension candidates. Maximal degree in co-relation 18034. Up to 1071 conditions per place. [2022-11-18 20:25:05,062 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 380 selfloop transitions, 452 changer transitions 6/880 dead transitions. [2022-11-18 20:25:05,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 880 transitions, 16565 flow [2022-11-18 20:25:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:25:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 20:25:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1503 transitions. [2022-11-18 20:25:05,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6254681647940075 [2022-11-18 20:25:05,066 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1503 transitions. [2022-11-18 20:25:05,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1503 transitions. [2022-11-18 20:25:05,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:05,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1503 transitions. [2022-11-18 20:25:05,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.666666666666664) internal successors, (1503), 27 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:05,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:05,073 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:05,074 INFO L175 Difference]: Start difference. First operand has 514 places, 854 transitions, 14563 flow. Second operand 27 states and 1503 transitions. [2022-11-18 20:25:05,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 880 transitions, 16565 flow [2022-11-18 20:25:05,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 880 transitions, 16455 flow, removed 14 selfloop flow, removed 18 redundant places. [2022-11-18 20:25:05,506 INFO L231 Difference]: Finished difference. Result has 523 places, 856 transitions, 15822 flow [2022-11-18 20:25:05,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=14442, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=15822, PETRI_PLACES=523, PETRI_TRANSITIONS=856} [2022-11-18 20:25:05,508 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 444 predicate places. [2022-11-18 20:25:05,508 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 856 transitions, 15822 flow [2022-11-18 20:25:05,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:05,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:05,509 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:05,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-18 20:25:05,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:25:05,715 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash -534739235, now seen corresponding path program 11 times [2022-11-18 20:25:05,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:05,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679049870] [2022-11-18 20:25:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:05,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:06,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:06,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679049870] [2022-11-18 20:25:06,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679049870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:06,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567063793] [2022-11-18 20:25:06,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:25:06,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:06,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:06,212 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:06,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:25:06,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:25:06,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:06,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:25:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:07,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:07,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567063793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:07,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:07,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-18 20:25:07,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590150363] [2022-11-18 20:25:07,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:07,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:25:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:25:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:25:07,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:25:07,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 856 transitions, 15822 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:07,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:07,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:25:07,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:11,197 INFO L130 PetriNetUnfolder]: 798/2980 cut-off events. [2022-11-18 20:25:11,197 INFO L131 PetriNetUnfolder]: For 43549/43561 co-relation queries the response was YES. [2022-11-18 20:25:11,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19178 conditions, 2980 events. 798/2980 cut-off events. For 43549/43561 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28305 event pairs, 89 based on Foata normal form. 4/2963 useless extension candidates. Maximal degree in co-relation 19073. Up to 1055 conditions per place. [2022-11-18 20:25:11,243 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 367 selfloop transitions, 479 changer transitions 12/900 dead transitions. [2022-11-18 20:25:11,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 900 transitions, 18048 flow [2022-11-18 20:25:11,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 20:25:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-18 20:25:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2041 transitions. [2022-11-18 20:25:11,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6197995748557547 [2022-11-18 20:25:11,247 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2041 transitions. [2022-11-18 20:25:11,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2041 transitions. [2022-11-18 20:25:11,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:11,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2041 transitions. [2022-11-18 20:25:11,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.16216216216216) internal successors, (2041), 37 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:11,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:11,258 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:11,258 INFO L175 Difference]: Start difference. First operand has 523 places, 856 transitions, 15822 flow. Second operand 37 states and 2041 transitions. [2022-11-18 20:25:11,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 900 transitions, 18048 flow [2022-11-18 20:25:11,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 900 transitions, 17659 flow, removed 7 selfloop flow, removed 17 redundant places. [2022-11-18 20:25:11,761 INFO L231 Difference]: Finished difference. Result has 550 places, 869 transitions, 17006 flow [2022-11-18 20:25:11,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=15442, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17006, PETRI_PLACES=550, PETRI_TRANSITIONS=869} [2022-11-18 20:25:11,763 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 471 predicate places. [2022-11-18 20:25:11,763 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 869 transitions, 17006 flow [2022-11-18 20:25:11,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:11,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:11,763 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:11,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:11,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:25:11,965 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:11,965 INFO L85 PathProgramCache]: Analyzing trace with hash 564448207, now seen corresponding path program 12 times [2022-11-18 20:25:11,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:11,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429698359] [2022-11-18 20:25:11,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:11,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:12,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:12,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429698359] [2022-11-18 20:25:12,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429698359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:12,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779455892] [2022-11-18 20:25:12,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:25:12,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:12,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:12,423 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:12,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:25:12,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 20:25:12,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:12,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:25:12,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:13,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:13,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779455892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:13,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:13,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-18 20:25:13,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468936324] [2022-11-18 20:25:13,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:13,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:25:13,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:13,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:25:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:25:13,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:25:13,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 869 transitions, 17006 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:13,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:13,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:25:13,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:17,197 INFO L130 PetriNetUnfolder]: 800/3082 cut-off events. [2022-11-18 20:25:17,197 INFO L131 PetriNetUnfolder]: For 51435/51460 co-relation queries the response was YES. [2022-11-18 20:25:17,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20297 conditions, 3082 events. 800/3082 cut-off events. For 51435/51460 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29633 event pairs, 115 based on Foata normal form. 5/3080 useless extension candidates. Maximal degree in co-relation 20179. Up to 1236 conditions per place. [2022-11-18 20:25:17,262 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 356 selfloop transitions, 498 changer transitions 6/902 dead transitions. [2022-11-18 20:25:17,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 902 transitions, 19157 flow [2022-11-18 20:25:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 20:25:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-18 20:25:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2022-11-18 20:25:17,266 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2022-11-18 20:25:17,266 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2022-11-18 20:25:17,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2022-11-18 20:25:17,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:17,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2022-11-18 20:25:17,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:17,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:17,274 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:17,274 INFO L175 Difference]: Start difference. First operand has 550 places, 869 transitions, 17006 flow. Second operand 33 states and 1827 transitions. [2022-11-18 20:25:17,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 902 transitions, 19157 flow [2022-11-18 20:25:17,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 902 transitions, 18698 flow, removed 36 selfloop flow, removed 21 redundant places. [2022-11-18 20:25:17,753 INFO L231 Difference]: Finished difference. Result has 561 places, 877 transitions, 17841 flow [2022-11-18 20:25:17,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=16560, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=17841, PETRI_PLACES=561, PETRI_TRANSITIONS=877} [2022-11-18 20:25:17,754 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 482 predicate places. [2022-11-18 20:25:17,755 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 877 transitions, 17841 flow [2022-11-18 20:25:17,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:17,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:17,755 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:17,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:17,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:17,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:17,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:17,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2042456693, now seen corresponding path program 13 times [2022-11-18 20:25:17,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:17,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375336033] [2022-11-18 20:25:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:17,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:18,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375336033] [2022-11-18 20:25:18,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375336033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945181806] [2022-11-18 20:25:18,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:25:18,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:18,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:18,380 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:18,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:25:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:18,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:25:18,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:19,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:20,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945181806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:20,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:20,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-18 20:25:20,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851348699] [2022-11-18 20:25:20,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:20,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:25:20,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:20,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:25:20,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:25:20,016 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:25:20,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 877 transitions, 17841 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:20,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:20,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:25:20,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:23,205 INFO L130 PetriNetUnfolder]: 800/3025 cut-off events. [2022-11-18 20:25:23,206 INFO L131 PetriNetUnfolder]: For 54385/54397 co-relation queries the response was YES. [2022-11-18 20:25:23,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20825 conditions, 3025 events. 800/3025 cut-off events. For 54385/54397 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28931 event pairs, 94 based on Foata normal form. 4/3007 useless extension candidates. Maximal degree in co-relation 20706. Up to 1066 conditions per place. [2022-11-18 20:25:23,247 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 390 selfloop transitions, 473 changer transitions 12/917 dead transitions. [2022-11-18 20:25:23,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 917 transitions, 20091 flow [2022-11-18 20:25:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 20:25:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-18 20:25:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1820 transitions. [2022-11-18 20:25:23,250 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6196799455226422 [2022-11-18 20:25:23,251 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1820 transitions. [2022-11-18 20:25:23,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1820 transitions. [2022-11-18 20:25:23,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:23,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1820 transitions. [2022-11-18 20:25:23,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.15151515151515) internal successors, (1820), 33 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:23,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:23,259 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:23,260 INFO L175 Difference]: Start difference. First operand has 561 places, 877 transitions, 17841 flow. Second operand 33 states and 1820 transitions. [2022-11-18 20:25:23,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 917 transitions, 20091 flow [2022-11-18 20:25:23,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 917 transitions, 19921 flow, removed 23 selfloop flow, removed 20 redundant places. [2022-11-18 20:25:23,755 INFO L231 Difference]: Finished difference. Result has 583 places, 887 transitions, 19235 flow [2022-11-18 20:25:23,757 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=17677, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=19235, PETRI_PLACES=583, PETRI_TRANSITIONS=887} [2022-11-18 20:25:23,757 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 504 predicate places. [2022-11-18 20:25:23,758 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 887 transitions, 19235 flow [2022-11-18 20:25:23,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:23,758 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:23,759 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:23,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:23,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:23,965 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash -280113973, now seen corresponding path program 14 times [2022-11-18 20:25:23,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:23,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537687103] [2022-11-18 20:25:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:23,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:24,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537687103] [2022-11-18 20:25:24,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537687103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121314615] [2022-11-18 20:25:24,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:25:24,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:24,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:24,552 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:24,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:25:24,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:25:24,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:24,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:25:24,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:25,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:26,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121314615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:26,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:26,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-18 20:25:26,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721315254] [2022-11-18 20:25:26,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:26,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:25:26,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:26,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:25:26,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:25:26,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:25:26,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 887 transitions, 19235 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:26,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:26,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:25:26,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:34,145 INFO L130 PetriNetUnfolder]: 860/3281 cut-off events. [2022-11-18 20:25:34,145 INFO L131 PetriNetUnfolder]: For 67162/67187 co-relation queries the response was YES. [2022-11-18 20:25:34,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23672 conditions, 3281 events. 860/3281 cut-off events. For 67162/67187 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32095 event pairs, 90 based on Foata normal form. 6/3275 useless extension candidates. Maximal degree in co-relation 23543. Up to 930 conditions per place. [2022-11-18 20:25:34,197 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 290 selfloop transitions, 717 changer transitions 12/1061 dead transitions. [2022-11-18 20:25:34,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 1061 transitions, 24357 flow [2022-11-18 20:25:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-18 20:25:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-11-18 20:25:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4796 transitions. [2022-11-18 20:25:34,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6193981660854966 [2022-11-18 20:25:34,205 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4796 transitions. [2022-11-18 20:25:34,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4796 transitions. [2022-11-18 20:25:34,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:34,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4796 transitions. [2022-11-18 20:25:34,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 55.12643678160919) internal successors, (4796), 87 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:34,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 89.0) internal successors, (7832), 88 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:34,226 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 89.0) internal successors, (7832), 88 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:34,227 INFO L175 Difference]: Start difference. First operand has 583 places, 887 transitions, 19235 flow. Second operand 87 states and 4796 transitions. [2022-11-18 20:25:34,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 1061 transitions, 24357 flow [2022-11-18 20:25:34,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 1061 transitions, 23811 flow, removed 52 selfloop flow, removed 20 redundant places. [2022-11-18 20:25:34,830 INFO L231 Difference]: Finished difference. Result has 663 places, 991 transitions, 23429 flow [2022-11-18 20:25:34,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=18739, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=23429, PETRI_PLACES=663, PETRI_TRANSITIONS=991} [2022-11-18 20:25:34,831 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 584 predicate places. [2022-11-18 20:25:34,831 INFO L495 AbstractCegarLoop]: Abstraction has has 663 places, 991 transitions, 23429 flow [2022-11-18 20:25:34,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:34,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:34,832 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:34,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:35,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:35,033 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:35,033 INFO L85 PathProgramCache]: Analyzing trace with hash 194159815, now seen corresponding path program 15 times [2022-11-18 20:25:35,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:35,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359420536] [2022-11-18 20:25:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:35,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:35,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:35,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359420536] [2022-11-18 20:25:35,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359420536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:35,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514645455] [2022-11-18 20:25:35,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:25:35,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:35,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:35,644 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:35,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:25:35,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:25:35,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:25:35,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:36,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:37,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514645455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:37,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:37,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-18 20:25:37,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058144326] [2022-11-18 20:25:37,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:37,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:25:37,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:37,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:25:37,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:25:37,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:25:37,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 991 transitions, 23429 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:37,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:37,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:25:37,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:43,948 INFO L130 PetriNetUnfolder]: 1090/3896 cut-off events. [2022-11-18 20:25:43,948 INFO L131 PetriNetUnfolder]: For 102958/102989 co-relation queries the response was YES. [2022-11-18 20:25:43,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30505 conditions, 3896 events. 1090/3896 cut-off events. For 102958/102989 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38667 event pairs, 109 based on Foata normal form. 4/3891 useless extension candidates. Maximal degree in co-relation 30362. Up to 951 conditions per place. [2022-11-18 20:25:44,008 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 414 selfloop transitions, 829 changer transitions 6/1291 dead transitions. [2022-11-18 20:25:44,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1291 transitions, 31552 flow [2022-11-18 20:25:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-18 20:25:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-18 20:25:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3650 transitions. [2022-11-18 20:25:44,013 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6309420916162489 [2022-11-18 20:25:44,013 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3650 transitions. [2022-11-18 20:25:44,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3650 transitions. [2022-11-18 20:25:44,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:44,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3650 transitions. [2022-11-18 20:25:44,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 56.15384615384615) internal successors, (3650), 65 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:44,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 89.0) internal successors, (5874), 66 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:44,025 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 89.0) internal successors, (5874), 66 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:44,025 INFO L175 Difference]: Start difference. First operand has 663 places, 991 transitions, 23429 flow. Second operand 65 states and 3650 transitions. [2022-11-18 20:25:44,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1291 transitions, 31552 flow [2022-11-18 20:25:45,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 690 places, 1291 transitions, 30456 flow, removed 375 selfloop flow, removed 31 redundant places. [2022-11-18 20:25:45,134 INFO L231 Difference]: Finished difference. Result has 703 places, 1196 transitions, 29447 flow [2022-11-18 20:25:45,136 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=22495, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=29447, PETRI_PLACES=703, PETRI_TRANSITIONS=1196} [2022-11-18 20:25:45,136 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 624 predicate places. [2022-11-18 20:25:45,137 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 1196 transitions, 29447 flow [2022-11-18 20:25:45,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:45,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:45,138 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:45,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:45,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:45,345 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:45,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1355653055, now seen corresponding path program 16 times [2022-11-18 20:25:45,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:45,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250844691] [2022-11-18 20:25:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:45,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:45,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:45,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250844691] [2022-11-18 20:25:45,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250844691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:45,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203064440] [2022-11-18 20:25:45,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:25:45,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:45,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:45,888 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:45,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:25:45,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:25:45,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:45,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:25:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:46,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:47,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203064440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:47,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:47,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-18 20:25:47,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761430320] [2022-11-18 20:25:47,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:47,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:25:47,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:47,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:25:47,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:25:47,392 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:25:47,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 1196 transitions, 29447 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:47,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:47,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:25:47,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:57,006 INFO L130 PetriNetUnfolder]: 1130/4033 cut-off events. [2022-11-18 20:25:57,006 INFO L131 PetriNetUnfolder]: For 117345/117393 co-relation queries the response was YES. [2022-11-18 20:25:57,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32920 conditions, 4033 events. 1130/4033 cut-off events. For 117345/117393 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 40269 event pairs, 82 based on Foata normal form. 9/4032 useless extension candidates. Maximal degree in co-relation 32773. Up to 1060 conditions per place. [2022-11-18 20:25:57,080 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 362 selfloop transitions, 917 changer transitions 12/1333 dead transitions. [2022-11-18 20:25:57,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 1333 transitions, 34320 flow [2022-11-18 20:25:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-18 20:25:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2022-11-18 20:25:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 5536 transitions. [2022-11-18 20:25:57,089 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6220224719101124 [2022-11-18 20:25:57,089 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 5536 transitions. [2022-11-18 20:25:57,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 5536 transitions. [2022-11-18 20:25:57,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:57,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 5536 transitions. [2022-11-18 20:25:57,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 55.36) internal successors, (5536), 100 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:57,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 89.0) internal successors, (8989), 101 states have internal predecessors, (8989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:57,117 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 89.0) internal successors, (8989), 101 states have internal predecessors, (8989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:57,117 INFO L175 Difference]: Start difference. First operand has 703 places, 1196 transitions, 29447 flow. Second operand 100 states and 5536 transitions. [2022-11-18 20:25:57,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 1333 transitions, 34320 flow [2022-11-18 20:25:58,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 1333 transitions, 33364 flow, removed 248 selfloop flow, removed 26 redundant places. [2022-11-18 20:25:58,701 INFO L231 Difference]: Finished difference. Result has 780 places, 1244 transitions, 32073 flow [2022-11-18 20:25:58,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=28600, PETRI_DIFFERENCE_MINUEND_PLACES=671, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=32073, PETRI_PLACES=780, PETRI_TRANSITIONS=1244} [2022-11-18 20:25:58,702 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 701 predicate places. [2022-11-18 20:25:58,703 INFO L495 AbstractCegarLoop]: Abstraction has has 780 places, 1244 transitions, 32073 flow [2022-11-18 20:25:58,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:58,703 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:58,704 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:58,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:58,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:58,910 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1191976297, now seen corresponding path program 17 times [2022-11-18 20:25:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:58,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349490797] [2022-11-18 20:25:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:58,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:59,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349490797] [2022-11-18 20:25:59,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349490797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:59,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814963022] [2022-11-18 20:25:59,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:25:59,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:59,597 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:59,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:25:59,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 20:25:59,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:59,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:25:59,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:00,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:01,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814963022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:01,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:01,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-18 20:26:01,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768235923] [2022-11-18 20:26:01,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:01,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 20:26:01,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:01,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 20:26:01,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:26:01,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:26:01,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 1244 transitions, 32073 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:01,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:01,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:26:01,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:11,981 INFO L130 PetriNetUnfolder]: 1382/4801 cut-off events. [2022-11-18 20:26:11,981 INFO L131 PetriNetUnfolder]: For 173835/173858 co-relation queries the response was YES. [2022-11-18 20:26:12,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42496 conditions, 4801 events. 1382/4801 cut-off events. For 173835/173858 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 48637 event pairs, 71 based on Foata normal form. 29/4812 useless extension candidates. Maximal degree in co-relation 42343. Up to 687 conditions per place. [2022-11-18 20:26:12,076 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 583 selfloop transitions, 1005 changer transitions 19/1649 dead transitions. [2022-11-18 20:26:12,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 1649 transitions, 45609 flow [2022-11-18 20:26:12,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-18 20:26:12,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-11-18 20:26:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 5293 transitions. [2022-11-18 20:26:12,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6326798948123357 [2022-11-18 20:26:12,087 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 5293 transitions. [2022-11-18 20:26:12,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 5293 transitions. [2022-11-18 20:26:12,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:12,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 5293 transitions. [2022-11-18 20:26:12,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 56.308510638297875) internal successors, (5293), 94 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:12,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 89.0) internal successors, (8455), 95 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:12,125 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 89.0) internal successors, (8455), 95 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:12,126 INFO L175 Difference]: Start difference. First operand has 780 places, 1244 transitions, 32073 flow. Second operand 94 states and 5293 transitions. [2022-11-18 20:26:12,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 1649 transitions, 45609 flow [2022-11-18 20:26:13,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 1649 transitions, 44503 flow, removed 208 selfloop flow, removed 54 redundant places. [2022-11-18 20:26:13,869 INFO L231 Difference]: Finished difference. Result has 846 places, 1455 transitions, 40746 flow [2022-11-18 20:26:13,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=31231, PETRI_DIFFERENCE_MINUEND_PLACES=717, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=817, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=40746, PETRI_PLACES=846, PETRI_TRANSITIONS=1455} [2022-11-18 20:26:13,871 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 767 predicate places. [2022-11-18 20:26:13,871 INFO L495 AbstractCegarLoop]: Abstraction has has 846 places, 1455 transitions, 40746 flow [2022-11-18 20:26:13,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:13,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:13,873 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:13,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:14,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 20:26:14,079 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:14,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1756563129, now seen corresponding path program 18 times [2022-11-18 20:26:14,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:14,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550046310] [2022-11-18 20:26:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:14,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:14,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:14,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550046310] [2022-11-18 20:26:14,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550046310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:14,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832786251] [2022-11-18 20:26:14,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:26:14,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:14,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:14,843 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:14,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:26:14,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 20:26:14,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:14,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:26:14,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:15,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:16,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832786251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:16,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:16,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-11-18 20:26:16,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155943211] [2022-11-18 20:26:16,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:16,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:26:16,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:16,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:26:16,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:26:16,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:26:16,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 846 places, 1455 transitions, 40746 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:16,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:16,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:26:16,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:31,446 INFO L130 PetriNetUnfolder]: 1658/5703 cut-off events. [2022-11-18 20:26:31,447 INFO L131 PetriNetUnfolder]: For 315524/315539 co-relation queries the response was YES. [2022-11-18 20:26:31,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57546 conditions, 5703 events. 1658/5703 cut-off events. For 315524/315539 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 59417 event pairs, 87 based on Foata normal form. 12/5695 useless extension candidates. Maximal degree in co-relation 57364. Up to 832 conditions per place. [2022-11-18 20:26:31,601 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 530 selfloop transitions, 1367 changer transitions 12/1951 dead transitions. [2022-11-18 20:26:31,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 978 places, 1951 transitions, 59308 flow [2022-11-18 20:26:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-11-18 20:26:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2022-11-18 20:26:31,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 7781 transitions. [2022-11-18 20:26:31,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.624478330658106 [2022-11-18 20:26:31,610 INFO L72 ComplementDD]: Start complementDD. Operand 140 states and 7781 transitions. [2022-11-18 20:26:31,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 140 states and 7781 transitions. [2022-11-18 20:26:31,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:31,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 140 states and 7781 transitions. [2022-11-18 20:26:31,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 141 states, 140 states have (on average 55.57857142857143) internal successors, (7781), 140 states have internal predecessors, (7781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:31,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:31,638 INFO L81 ComplementDD]: Finished complementDD. Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:31,639 INFO L175 Difference]: Start difference. First operand has 846 places, 1455 transitions, 40746 flow. Second operand 140 states and 7781 transitions. [2022-11-18 20:26:31,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 978 places, 1951 transitions, 59308 flow [2022-11-18 20:26:34,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 932 places, 1951 transitions, 57201 flow, removed 604 selfloop flow, removed 46 redundant places. [2022-11-18 20:26:35,011 INFO L231 Difference]: Finished difference. Result has 960 places, 1762 transitions, 52497 flow [2022-11-18 20:26:35,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=38987, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=140, PETRI_FLOW=52497, PETRI_PLACES=960, PETRI_TRANSITIONS=1762} [2022-11-18 20:26:35,013 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 881 predicate places. [2022-11-18 20:26:35,013 INFO L495 AbstractCegarLoop]: Abstraction has has 960 places, 1762 transitions, 52497 flow [2022-11-18 20:26:35,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:35,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:35,014 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:35,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:35,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:26:35,215 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:35,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:35,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1450801589, now seen corresponding path program 19 times [2022-11-18 20:26:35,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:35,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223890649] [2022-11-18 20:26:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:35,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:35,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:35,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223890649] [2022-11-18 20:26:35,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223890649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:35,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419772641] [2022-11-18 20:26:35,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:26:35,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:35,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:35,763 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:35,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:26:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:35,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:26:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:36,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:37,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419772641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:37,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:37,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-18 20:26:37,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017600208] [2022-11-18 20:26:37,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:37,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 20:26:37,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:37,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 20:26:37,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:26:37,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:26:37,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 960 places, 1762 transitions, 52497 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:37,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:37,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:26:37,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:06,451 INFO L130 PetriNetUnfolder]: 1852/6369 cut-off events. [2022-11-18 20:27:06,451 INFO L131 PetriNetUnfolder]: For 393240/393263 co-relation queries the response was YES. [2022-11-18 20:27:06,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66310 conditions, 6369 events. 1852/6369 cut-off events. For 393240/393263 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 67654 event pairs, 73 based on Foata normal form. 14/6368 useless extension candidates. Maximal degree in co-relation 66115. Up to 930 conditions per place. [2022-11-18 20:27:06,590 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 498 selfloop transitions, 1728 changer transitions 13/2281 dead transitions. [2022-11-18 20:27:06,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1195 places, 2281 transitions, 70137 flow [2022-11-18 20:27:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-11-18 20:27:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2022-11-18 20:27:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 13425 transitions. [2022-11-18 20:27:06,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6233169282198904 [2022-11-18 20:27:06,601 INFO L72 ComplementDD]: Start complementDD. Operand 242 states and 13425 transitions. [2022-11-18 20:27:06,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 242 states and 13425 transitions. [2022-11-18 20:27:06,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:06,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 242 states and 13425 transitions. [2022-11-18 20:27:06,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 243 states, 242 states have (on average 55.47520661157025) internal successors, (13425), 242 states have internal predecessors, (13425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:06,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 243 states, 243 states have (on average 89.0) internal successors, (21627), 243 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:06,642 INFO L81 ComplementDD]: Finished complementDD. Result has 243 states, 243 states have (on average 89.0) internal successors, (21627), 243 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:06,642 INFO L175 Difference]: Start difference. First operand has 960 places, 1762 transitions, 52497 flow. Second operand 242 states and 13425 transitions. [2022-11-18 20:27:06,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1195 places, 2281 transitions, 70137 flow [2022-11-18 20:27:10,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1166 places, 2281 transitions, 68446 flow, removed 731 selfloop flow, removed 29 redundant places. [2022-11-18 20:27:10,315 INFO L231 Difference]: Finished difference. Result has 1202 places, 2017 transitions, 63477 flow [2022-11-18 20:27:10,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=51191, PETRI_DIFFERENCE_MINUEND_PLACES=925, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1486, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=242, PETRI_FLOW=63477, PETRI_PLACES=1202, PETRI_TRANSITIONS=2017} [2022-11-18 20:27:10,317 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1123 predicate places. [2022-11-18 20:27:10,317 INFO L495 AbstractCegarLoop]: Abstraction has has 1202 places, 2017 transitions, 63477 flow [2022-11-18 20:27:10,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:10,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:10,318 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:10,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-18 20:27:10,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:27:10,525 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:10,526 INFO L85 PathProgramCache]: Analyzing trace with hash -577478975, now seen corresponding path program 1 times [2022-11-18 20:27:10,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:10,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302368553] [2022-11-18 20:27:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:10,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:10,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:10,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302368553] [2022-11-18 20:27:10,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302368553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:10,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194971258] [2022-11-18 20:27:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:10,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:10,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:10,911 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:10,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:27:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:27:10,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:11,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:11,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194971258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:11,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:11,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-11-18 20:27:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748414210] [2022-11-18 20:27:11,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:11,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:27:11,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:27:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:27:11,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-11-18 20:27:11,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1202 places, 2017 transitions, 63477 flow. Second operand has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:11,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:11,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-11-18 20:27:11,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:20,504 INFO L130 PetriNetUnfolder]: 2069/6726 cut-off events. [2022-11-18 20:27:20,504 INFO L131 PetriNetUnfolder]: For 486783/486798 co-relation queries the response was YES. [2022-11-18 20:27:20,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73868 conditions, 6726 events. 2069/6726 cut-off events. For 486783/486798 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70576 event pairs, 295 based on Foata normal form. 12/6707 useless extension candidates. Maximal degree in co-relation 73647. Up to 1859 conditions per place. [2022-11-18 20:27:20,716 INFO L137 encePairwiseOnDemand]: 71/89 looper letters, 871 selfloop transitions, 1181 changer transitions 27/2120 dead transitions. [2022-11-18 20:27:20,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1249 places, 2120 transitions, 69637 flow [2022-11-18 20:27:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:27:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-18 20:27:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3004 transitions. [2022-11-18 20:27:20,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6250520183104453 [2022-11-18 20:27:20,719 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3004 transitions. [2022-11-18 20:27:20,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3004 transitions. [2022-11-18 20:27:20,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:20,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3004 transitions. [2022-11-18 20:27:20,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 55.629629629629626) internal successors, (3004), 54 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:20,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:20,724 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:20,724 INFO L175 Difference]: Start difference. First operand has 1202 places, 2017 transitions, 63477 flow. Second operand 54 states and 3004 transitions. [2022-11-18 20:27:20,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1249 places, 2120 transitions, 69637 flow [2022-11-18 20:27:26,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1138 places, 2120 transitions, 67170 flow, removed 612 selfloop flow, removed 111 redundant places. [2022-11-18 20:27:26,195 INFO L231 Difference]: Finished difference. Result has 1152 places, 2018 transitions, 63566 flow [2022-11-18 20:27:26,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=61046, PETRI_DIFFERENCE_MINUEND_PLACES=1085, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=63566, PETRI_PLACES=1152, PETRI_TRANSITIONS=2018} [2022-11-18 20:27:26,197 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1073 predicate places. [2022-11-18 20:27:26,198 INFO L495 AbstractCegarLoop]: Abstraction has has 1152 places, 2018 transitions, 63566 flow [2022-11-18 20:27:26,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:26,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:26,199 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:26,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:26,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:27:26,404 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:26,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1832449457, now seen corresponding path program 20 times [2022-11-18 20:27:26,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:26,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768455778] [2022-11-18 20:27:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:26,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:26,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768455778] [2022-11-18 20:27:26,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768455778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:26,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897406000] [2022-11-18 20:27:26,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:27:26,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:26,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:26,848 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:26,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:27:26,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:27:26,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:26,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:27:26,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:27,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:28,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897406000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:28,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:28,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-18 20:27:28,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197524759] [2022-11-18 20:27:28,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:28,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 20:27:28,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 20:27:28,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:27:28,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:27:28,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1152 places, 2018 transitions, 63566 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:28,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:28,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:27:28,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:41,063 INFO L130 PetriNetUnfolder]: 1893/6407 cut-off events. [2022-11-18 20:27:41,063 INFO L131 PetriNetUnfolder]: For 512729/512744 co-relation queries the response was YES. [2022-11-18 20:27:41,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74092 conditions, 6407 events. 1893/6407 cut-off events. For 512729/512744 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 67633 event pairs, 113 based on Foata normal form. 12/6391 useless extension candidates. Maximal degree in co-relation 73873. Up to 1086 conditions per place. [2022-11-18 20:27:41,224 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 660 selfloop transitions, 1480 changer transitions 12/2195 dead transitions. [2022-11-18 20:27:41,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1241 places, 2195 transitions, 73529 flow [2022-11-18 20:27:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-18 20:27:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-11-18 20:27:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5929 transitions. [2022-11-18 20:27:41,230 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6225979208232699 [2022-11-18 20:27:41,230 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5929 transitions. [2022-11-18 20:27:41,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5929 transitions. [2022-11-18 20:27:41,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:41,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5929 transitions. [2022-11-18 20:27:41,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 55.41121495327103) internal successors, (5929), 107 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:41,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:41,250 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:41,250 INFO L175 Difference]: Start difference. First operand has 1152 places, 2018 transitions, 63566 flow. Second operand 107 states and 5929 transitions. [2022-11-18 20:27:41,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1241 places, 2195 transitions, 73529 flow [2022-11-18 20:27:46,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1215 places, 2195 transitions, 72738 flow, removed 87 selfloop flow, removed 26 redundant places. [2022-11-18 20:27:46,094 INFO L231 Difference]: Finished difference. Result has 1229 places, 2090 transitions, 69440 flow [2022-11-18 20:27:46,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=62902, PETRI_DIFFERENCE_MINUEND_PLACES=1109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=69440, PETRI_PLACES=1229, PETRI_TRANSITIONS=2090} [2022-11-18 20:27:46,096 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1150 predicate places. [2022-11-18 20:27:46,096 INFO L495 AbstractCegarLoop]: Abstraction has has 1229 places, 2090 transitions, 69440 flow [2022-11-18 20:27:46,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:46,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:46,097 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:46,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:46,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:27:46,303 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1209061875, now seen corresponding path program 21 times [2022-11-18 20:27:46,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:46,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912471431] [2022-11-18 20:27:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:46,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:46,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:46,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912471431] [2022-11-18 20:27:46,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912471431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:46,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347427492] [2022-11-18 20:27:46,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:27:46,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:46,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:46,736 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:46,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:27:46,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:27:46,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:46,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:27:46,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:47,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:48,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347427492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:48,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:48,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-18 20:27:48,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503917265] [2022-11-18 20:27:48,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:48,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 20:27:48,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:48,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 20:27:48,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:27:48,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:27:48,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1229 places, 2090 transitions, 69440 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:48,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:48,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:27:48,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:08,472 INFO L130 PetriNetUnfolder]: 2274/7565 cut-off events. [2022-11-18 20:28:08,472 INFO L131 PetriNetUnfolder]: For 663924/663947 co-relation queries the response was YES. [2022-11-18 20:28:08,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92849 conditions, 7565 events. 2274/7565 cut-off events. For 663924/663947 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 81799 event pairs, 97 based on Foata normal form. 14/7570 useless extension candidates. Maximal degree in co-relation 92625. Up to 1128 conditions per place. [2022-11-18 20:28:08,735 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 647 selfloop transitions, 2012 changer transitions 12/2714 dead transitions. [2022-11-18 20:28:08,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1388 places, 2714 transitions, 96896 flow [2022-11-18 20:28:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-11-18 20:28:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2022-11-18 20:28:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 9368 transitions. [2022-11-18 20:28:08,846 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6265382557517389 [2022-11-18 20:28:08,847 INFO L72 ComplementDD]: Start complementDD. Operand 168 states and 9368 transitions. [2022-11-18 20:28:08,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 168 states and 9368 transitions. [2022-11-18 20:28:08,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:08,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 168 states and 9368 transitions. [2022-11-18 20:28:08,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 169 states, 168 states have (on average 55.76190476190476) internal successors, (9368), 168 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:08,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:08,876 INFO L81 ComplementDD]: Finished complementDD. Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:08,876 INFO L175 Difference]: Start difference. First operand has 1229 places, 2090 transitions, 69440 flow. Second operand 168 states and 9368 transitions. [2022-11-18 20:28:08,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1388 places, 2714 transitions, 96896 flow [2022-11-18 20:28:15,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1329 places, 2714 transitions, 95311 flow, removed 143 selfloop flow, removed 59 redundant places. [2022-11-18 20:28:16,055 INFO L231 Difference]: Finished difference. Result has 1361 places, 2482 transitions, 88942 flow [2022-11-18 20:28:16,058 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=68207, PETRI_DIFFERENCE_MINUEND_PLACES=1162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=168, PETRI_FLOW=88942, PETRI_PLACES=1361, PETRI_TRANSITIONS=2482} [2022-11-18 20:28:16,059 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1282 predicate places. [2022-11-18 20:28:16,059 INFO L495 AbstractCegarLoop]: Abstraction has has 1361 places, 2482 transitions, 88942 flow [2022-11-18 20:28:16,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:16,060 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:16,060 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:16,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:16,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:28:16,266 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:16,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2008610497, now seen corresponding path program 2 times [2022-11-18 20:28:16,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:16,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533211190] [2022-11-18 20:28:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:16,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:16,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:16,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533211190] [2022-11-18 20:28:16,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533211190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:16,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838671879] [2022-11-18 20:28:16,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:28:16,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:16,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:16,647 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:16,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:28:16,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:28:16,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:28:16,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:17,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:17,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838671879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:17,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:17,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-11-18 20:28:17,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927317800] [2022-11-18 20:28:17,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:17,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:28:17,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:17,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:28:17,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:28:17,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-11-18 20:28:17,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1361 places, 2482 transitions, 88942 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:17,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:17,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-11-18 20:28:17,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:31,864 INFO L130 PetriNetUnfolder]: 2627/8394 cut-off events. [2022-11-18 20:28:31,864 INFO L131 PetriNetUnfolder]: For 815343/815366 co-relation queries the response was YES. [2022-11-18 20:28:32,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106566 conditions, 8394 events. 2627/8394 cut-off events. For 815343/815366 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 91151 event pairs, 418 based on Foata normal form. 17/8374 useless extension candidates. Maximal degree in co-relation 106317. Up to 2548 conditions per place. [2022-11-18 20:28:32,241 INFO L137 encePairwiseOnDemand]: 70/89 looper letters, 984 selfloop transitions, 1640 changer transitions 32/2697 dead transitions. [2022-11-18 20:28:32,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1436 places, 2697 transitions, 101161 flow [2022-11-18 20:28:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-18 20:28:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-11-18 20:28:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4518 transitions. [2022-11-18 20:28:32,243 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.619073718827076 [2022-11-18 20:28:32,243 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 4518 transitions. [2022-11-18 20:28:32,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 4518 transitions. [2022-11-18 20:28:32,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:32,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 4518 transitions. [2022-11-18 20:28:32,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 55.09756097560975) internal successors, (4518), 82 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:32,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:32,254 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:32,254 INFO L175 Difference]: Start difference. First operand has 1361 places, 2482 transitions, 88942 flow. Second operand 82 states and 4518 transitions. [2022-11-18 20:28:32,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1436 places, 2697 transitions, 101161 flow [2022-11-18 20:28:42,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1386 places, 2697 transitions, 98447 flow, removed 614 selfloop flow, removed 50 redundant places. [2022-11-18 20:28:42,512 INFO L231 Difference]: Finished difference. Result has 1405 places, 2570 transitions, 93940 flow [2022-11-18 20:28:42,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=86362, PETRI_DIFFERENCE_MINUEND_PLACES=1305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=922, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=93940, PETRI_PLACES=1405, PETRI_TRANSITIONS=2570} [2022-11-18 20:28:42,514 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1326 predicate places. [2022-11-18 20:28:42,514 INFO L495 AbstractCegarLoop]: Abstraction has has 1405 places, 2570 transitions, 93940 flow [2022-11-18 20:28:42,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:42,514 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:42,515 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:42,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:42,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:42,715 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:42,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1087887845, now seen corresponding path program 22 times [2022-11-18 20:28:42,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:42,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049181075] [2022-11-18 20:28:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:42,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:43,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049181075] [2022-11-18 20:28:43,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049181075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:43,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699935886] [2022-11-18 20:28:43,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:28:43,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:43,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:43,284 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:43,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:28:43,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:28:43,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:43,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:28:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:44,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:44,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699935886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:44,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:44,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-11-18 20:28:44,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080200339] [2022-11-18 20:28:44,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:44,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:28:44,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:44,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:28:44,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:28:44,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:28:44,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1405 places, 2570 transitions, 93940 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:44,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:44,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:28:44,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:17,012 INFO L130 PetriNetUnfolder]: 2414/8071 cut-off events. [2022-11-18 20:29:17,012 INFO L131 PetriNetUnfolder]: For 843819/843842 co-relation queries the response was YES. [2022-11-18 20:29:17,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107220 conditions, 8071 events. 2414/8071 cut-off events. For 843819/843842 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 88489 event pairs, 62 based on Foata normal form. 14/8076 useless extension candidates. Maximal degree in co-relation 106960. Up to 1151 conditions per place. [2022-11-18 20:29:17,461 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 529 selfloop transitions, 2344 changer transitions 12/2929 dead transitions. [2022-11-18 20:29:17,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1605 places, 2929 transitions, 111641 flow [2022-11-18 20:29:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-11-18 20:29:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2022-11-18 20:29:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 12002 transitions. [2022-11-18 20:29:17,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6243237619642114 [2022-11-18 20:29:17,471 INFO L72 ComplementDD]: Start complementDD. Operand 216 states and 12002 transitions. [2022-11-18 20:29:17,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 216 states and 12002 transitions. [2022-11-18 20:29:17,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:17,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 216 states and 12002 transitions. [2022-11-18 20:29:17,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 217 states, 216 states have (on average 55.56481481481482) internal successors, (12002), 216 states have internal predecessors, (12002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:17,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 217 states, 217 states have (on average 89.0) internal successors, (19313), 217 states have internal predecessors, (19313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:17,660 INFO L81 ComplementDD]: Finished complementDD. Result has 217 states, 217 states have (on average 89.0) internal successors, (19313), 217 states have internal predecessors, (19313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:17,660 INFO L175 Difference]: Start difference. First operand has 1405 places, 2570 transitions, 93940 flow. Second operand 216 states and 12002 transitions. [2022-11-18 20:29:17,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1605 places, 2929 transitions, 111641 flow [2022-11-18 20:29:28,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1554 places, 2929 transitions, 108735 flow, removed 277 selfloop flow, removed 51 redundant places. [2022-11-18 20:29:28,729 INFO L231 Difference]: Finished difference. Result has 1577 places, 2694 transitions, 102019 flow [2022-11-18 20:29:28,730 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=91538, PETRI_DIFFERENCE_MINUEND_PLACES=1339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=216, PETRI_FLOW=102019, PETRI_PLACES=1577, PETRI_TRANSITIONS=2694} [2022-11-18 20:29:28,731 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1498 predicate places. [2022-11-18 20:29:28,731 INFO L495 AbstractCegarLoop]: Abstraction has has 1577 places, 2694 transitions, 102019 flow [2022-11-18 20:29:28,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:28,731 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:28,731 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:28,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:28,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:28,934 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:29:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:28,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1395740355, now seen corresponding path program 23 times [2022-11-18 20:29:28,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:28,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818587742] [2022-11-18 20:29:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:28,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:29,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:29,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818587742] [2022-11-18 20:29:29,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818587742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:29,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898772990] [2022-11-18 20:29:29,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:29:29,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:29,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:29,458 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:29,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:29:29,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 20:29:29,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:29,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:29:29,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:30,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:31,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898772990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:31,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:31,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-18 20:29:31,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799119468] [2022-11-18 20:29:31,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:31,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 20:29:31,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:31,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 20:29:31,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:29:31,483 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:29:31,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1577 places, 2694 transitions, 102019 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:31,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:31,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:29:31,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:52,308 INFO L130 PetriNetUnfolder]: 2458/8206 cut-off events. [2022-11-18 20:29:52,308 INFO L131 PetriNetUnfolder]: For 881716/881739 co-relation queries the response was YES. [2022-11-18 20:29:52,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111471 conditions, 8206 events. 2458/8206 cut-off events. For 881716/881739 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 90264 event pairs, 181 based on Foata normal form. 14/8179 useless extension candidates. Maximal degree in co-relation 111202. Up to 1494 conditions per place. [2022-11-18 20:29:52,692 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 814 selfloop transitions, 2008 changer transitions 12/2878 dead transitions. [2022-11-18 20:29:52,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1692 places, 2878 transitions, 114705 flow [2022-11-18 20:29:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-18 20:29:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2022-11-18 20:29:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 6757 transitions. [2022-11-18 20:29:52,697 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6223061337262847 [2022-11-18 20:29:52,697 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 6757 transitions. [2022-11-18 20:29:52,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 6757 transitions. [2022-11-18 20:29:52,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:52,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 6757 transitions. [2022-11-18 20:29:52,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 55.385245901639344) internal successors, (6757), 122 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:52,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:52,712 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:52,713 INFO L175 Difference]: Start difference. First operand has 1577 places, 2694 transitions, 102019 flow. Second operand 122 states and 6757 transitions. [2022-11-18 20:29:52,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1692 places, 2878 transitions, 114705 flow [2022-11-18 20:30:05,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1572 places, 2878 transitions, 111808 flow, removed 354 selfloop flow, removed 120 redundant places. [2022-11-18 20:30:05,310 INFO L231 Difference]: Finished difference. Result has 1590 places, 2770 transitions, 108228 flow [2022-11-18 20:30:05,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=99258, PETRI_DIFFERENCE_MINUEND_PLACES=1451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1932, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=108228, PETRI_PLACES=1590, PETRI_TRANSITIONS=2770} [2022-11-18 20:30:05,313 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1511 predicate places. [2022-11-18 20:30:05,313 INFO L495 AbstractCegarLoop]: Abstraction has has 1590 places, 2770 transitions, 108228 flow [2022-11-18 20:30:05,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:05,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:05,314 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:05,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:05,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:05,514 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:30:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:05,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1225450363, now seen corresponding path program 3 times [2022-11-18 20:30:05,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:05,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224731613] [2022-11-18 20:30:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:05,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:05,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224731613] [2022-11-18 20:30:05,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224731613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272439062] [2022-11-18 20:30:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:30:05,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:05,923 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:05,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:30:06,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:30:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:06,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:30:06,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:06,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:07,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272439062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:07,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:07,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-11-18 20:30:07,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602580802] [2022-11-18 20:30:07,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:07,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:30:07,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:07,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:30:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:30:07,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-11-18 20:30:07,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1590 places, 2770 transitions, 108228 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:07,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:07,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-11-18 20:30:07,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:31,094 INFO L130 PetriNetUnfolder]: 3309/10129 cut-off events. [2022-11-18 20:30:31,094 INFO L131 PetriNetUnfolder]: For 1208951/1208966 co-relation queries the response was YES. [2022-11-18 20:30:31,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143855 conditions, 10129 events. 3309/10129 cut-off events. For 1208951/1208966 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 111613 event pairs, 251 based on Foata normal form. 69/10171 useless extension candidates. Maximal degree in co-relation 143578. Up to 2103 conditions per place. [2022-11-18 20:30:31,702 INFO L137 encePairwiseOnDemand]: 70/89 looper letters, 1052 selfloop transitions, 2634 changer transitions 69/3796 dead transitions. [2022-11-18 20:30:31,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1724 places, 3796 transitions, 155003 flow [2022-11-18 20:30:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-11-18 20:30:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2022-11-18 20:30:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 7752 transitions. [2022-11-18 20:30:31,707 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6177384652163519 [2022-11-18 20:30:31,707 INFO L72 ComplementDD]: Start complementDD. Operand 141 states and 7752 transitions. [2022-11-18 20:30:31,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 7752 transitions. [2022-11-18 20:30:31,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:31,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 141 states and 7752 transitions. [2022-11-18 20:30:31,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 142 states, 141 states have (on average 54.97872340425532) internal successors, (7752), 141 states have internal predecessors, (7752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:31,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 142 states, 142 states have (on average 89.0) internal successors, (12638), 142 states have internal predecessors, (12638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:31,725 INFO L81 ComplementDD]: Finished complementDD. Result has 142 states, 142 states have (on average 89.0) internal successors, (12638), 142 states have internal predecessors, (12638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:31,725 INFO L175 Difference]: Start difference. First operand has 1590 places, 2770 transitions, 108228 flow. Second operand 141 states and 7752 transitions. [2022-11-18 20:30:31,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1724 places, 3796 transitions, 155003 flow [2022-11-18 20:30:57,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1658 places, 3796 transitions, 151467 flow, removed 230 selfloop flow, removed 66 redundant places. [2022-11-18 20:30:57,434 INFO L231 Difference]: Finished difference. Result has 1692 places, 3409 transitions, 140099 flow [2022-11-18 20:30:57,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=105554, PETRI_DIFFERENCE_MINUEND_PLACES=1518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2026, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=141, PETRI_FLOW=140099, PETRI_PLACES=1692, PETRI_TRANSITIONS=3409} [2022-11-18 20:30:57,436 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1613 predicate places. [2022-11-18 20:30:57,437 INFO L495 AbstractCegarLoop]: Abstraction has has 1692 places, 3409 transitions, 140099 flow [2022-11-18 20:30:57,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:57,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:57,437 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:57,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-18 20:30:57,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-18 20:30:57,638 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:30:57,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:57,638 INFO L85 PathProgramCache]: Analyzing trace with hash -660777433, now seen corresponding path program 4 times [2022-11-18 20:30:57,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:57,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309111865] [2022-11-18 20:30:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:57,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:58,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:58,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309111865] [2022-11-18 20:30:58,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309111865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:58,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987290249] [2022-11-18 20:30:58,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:30:58,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:58,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:58,095 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:58,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 20:30:58,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:30:58,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:58,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:30:58,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:58,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:59,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987290249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:59,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:59,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-11-18 20:30:59,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757635413] [2022-11-18 20:30:59,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:59,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:30:59,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:59,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:30:59,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:30:59,384 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-11-18 20:30:59,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1692 places, 3409 transitions, 140099 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:59,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:59,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-11-18 20:30:59,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:24,141 INFO L130 PetriNetUnfolder]: 3245/9727 cut-off events. [2022-11-18 20:31:24,141 INFO L131 PetriNetUnfolder]: For 1389319/1389342 co-relation queries the response was YES. [2022-11-18 20:31:24,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153364 conditions, 9727 events. 3245/9727 cut-off events. For 1389319/1389342 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 104657 event pairs, 406 based on Foata normal form. 19/9716 useless extension candidates. Maximal degree in co-relation 153066. Up to 3627 conditions per place. [2022-11-18 20:31:24,714 INFO L137 encePairwiseOnDemand]: 70/89 looper letters, 1251 selfloop transitions, 2195 changer transitions 42/3529 dead transitions. [2022-11-18 20:31:24,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1764 places, 3529 transitions, 150753 flow [2022-11-18 20:31:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-18 20:31:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-11-18 20:31:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 4683 transitions. [2022-11-18 20:31:24,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.619035029742234 [2022-11-18 20:31:24,718 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 4683 transitions. [2022-11-18 20:31:24,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 4683 transitions. [2022-11-18 20:31:24,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:24,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 4683 transitions. [2022-11-18 20:31:24,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 55.09411764705882) internal successors, (4683), 85 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:24,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 89.0) internal successors, (7654), 86 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:24,728 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 89.0) internal successors, (7654), 86 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:24,728 INFO L175 Difference]: Start difference. First operand has 1692 places, 3409 transitions, 140099 flow. Second operand 85 states and 4683 transitions. [2022-11-18 20:31:24,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1764 places, 3529 transitions, 150753 flow [2022-11-18 20:31:55,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1705 places, 3529 transitions, 147056 flow, removed 933 selfloop flow, removed 59 redundant places. [2022-11-18 20:31:55,940 INFO L231 Difference]: Finished difference. Result has 1714 places, 3389 transitions, 140590 flow [2022-11-18 20:31:55,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=136682, PETRI_DIFFERENCE_MINUEND_PLACES=1621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=140590, PETRI_PLACES=1714, PETRI_TRANSITIONS=3389} [2022-11-18 20:31:55,942 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1635 predicate places. [2022-11-18 20:31:55,943 INFO L495 AbstractCegarLoop]: Abstraction has has 1714 places, 3389 transitions, 140590 flow [2022-11-18 20:31:55,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:55,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:55,943 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:55,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:56,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-18 20:31:56,144 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:31:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:56,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1260071331, now seen corresponding path program 24 times [2022-11-18 20:31:56,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:56,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441657741] [2022-11-18 20:31:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:56,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:56,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:56,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441657741] [2022-11-18 20:31:56,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441657741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:56,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330488188] [2022-11-18 20:31:56,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:31:56,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:56,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:56,712 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:56,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 20:31:56,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 20:31:56,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:56,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:31:56,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:57,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:58,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330488188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:58,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:58,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-11-18 20:31:58,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56271558] [2022-11-18 20:31:58,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:58,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:31:58,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:58,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:31:58,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:31:58,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:31:58,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1714 places, 3389 transitions, 140590 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:58,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:58,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:31:58,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:47,704 INFO L130 PetriNetUnfolder]: 3153/9617 cut-off events. [2022-11-18 20:32:47,704 INFO L131 PetriNetUnfolder]: For 1341796/1341844 co-relation queries the response was YES. [2022-11-18 20:32:48,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150837 conditions, 9617 events. 3153/9617 cut-off events. For 1341796/1341844 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 103638 event pairs, 80 based on Foata normal form. 16/9607 useless extension candidates. Maximal degree in co-relation 150541. Up to 1490 conditions per place. [2022-11-18 20:32:48,527 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 682 selfloop transitions, 3065 changer transitions 18/3831 dead transitions. [2022-11-18 20:32:48,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1940 places, 3831 transitions, 162391 flow [2022-11-18 20:32:48,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-11-18 20:32:48,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2022-11-18 20:32:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 14441 transitions. [2022-11-18 20:32:48,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6240708729472775 [2022-11-18 20:32:48,539 INFO L72 ComplementDD]: Start complementDD. Operand 260 states and 14441 transitions. [2022-11-18 20:32:48,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 260 states and 14441 transitions. [2022-11-18 20:32:48,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:48,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 260 states and 14441 transitions. [2022-11-18 20:32:48,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 261 states, 260 states have (on average 55.542307692307695) internal successors, (14441), 260 states have internal predecessors, (14441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:48,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 261 states, 261 states have (on average 89.0) internal successors, (23229), 261 states have internal predecessors, (23229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:48,571 INFO L81 ComplementDD]: Finished complementDD. Result has 261 states, 261 states have (on average 89.0) internal successors, (23229), 261 states have internal predecessors, (23229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:48,572 INFO L175 Difference]: Start difference. First operand has 1714 places, 3389 transitions, 140590 flow. Second operand 260 states and 14441 transitions. [2022-11-18 20:32:48,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1940 places, 3831 transitions, 162391 flow [2022-11-18 20:33:19,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1859 places, 3831 transitions, 157676 flow, removed 369 selfloop flow, removed 81 redundant places. [2022-11-18 20:33:19,405 INFO L231 Difference]: Finished difference. Result has 1879 places, 3493 transitions, 148118 flow [2022-11-18 20:33:19,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=136671, PETRI_DIFFERENCE_MINUEND_PLACES=1600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2962, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=260, PETRI_FLOW=148118, PETRI_PLACES=1879, PETRI_TRANSITIONS=3493} [2022-11-18 20:33:19,408 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1800 predicate places. [2022-11-18 20:33:19,408 INFO L495 AbstractCegarLoop]: Abstraction has has 1879 places, 3493 transitions, 148118 flow [2022-11-18 20:33:19,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:19,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:19,408 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:19,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:19,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:19,609 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:33:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:19,610 INFO L85 PathProgramCache]: Analyzing trace with hash 504206899, now seen corresponding path program 5 times [2022-11-18 20:33:19,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:19,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401625258] [2022-11-18 20:33:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:19,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:20,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:20,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401625258] [2022-11-18 20:33:20,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401625258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:20,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389126254] [2022-11-18 20:33:20,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:33:20,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:20,102 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:20,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 20:33:20,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 20:33:20,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:33:20,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:33:20,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:20,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:21,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389126254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:33:21,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:33:21,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-11-18 20:33:21,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483617177] [2022-11-18 20:33:21,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:33:21,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:33:21,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:21,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:33:21,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:33:21,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-11-18 20:33:21,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1879 places, 3493 transitions, 148118 flow. Second operand has 38 states, 38 states have (on average 52.578947368421055) internal successors, (1998), 38 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:21,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:21,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-11-18 20:33:21,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:51,205 INFO L130 PetriNetUnfolder]: 3388/10333 cut-off events. [2022-11-18 20:33:51,205 INFO L131 PetriNetUnfolder]: For 1496987/1497002 co-relation queries the response was YES. [2022-11-18 20:33:51,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160074 conditions, 10333 events. 3388/10333 cut-off events. For 1496987/1497002 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 113056 event pairs, 365 based on Foata normal form. 61/10359 useless extension candidates. Maximal degree in co-relation 159771. Up to 1828 conditions per place. [2022-11-18 20:33:52,240 INFO L137 encePairwiseOnDemand]: 71/89 looper letters, 1695 selfloop transitions, 2075 changer transitions 31/3842 dead transitions. [2022-11-18 20:33:52,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1960 places, 3842 transitions, 168623 flow [2022-11-18 20:33:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-18 20:33:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-11-18 20:33:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5041 transitions. [2022-11-18 20:33:52,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6224225212989258 [2022-11-18 20:33:52,248 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5041 transitions. [2022-11-18 20:33:52,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5041 transitions. [2022-11-18 20:33:52,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:52,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5041 transitions. [2022-11-18 20:33:52,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 55.395604395604394) internal successors, (5041), 91 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:52,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:52,267 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:52,267 INFO L175 Difference]: Start difference. First operand has 1879 places, 3493 transitions, 148118 flow. Second operand 91 states and 5041 transitions. [2022-11-18 20:33:52,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1960 places, 3842 transitions, 168623 flow [2022-11-18 20:34:21,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1781 places, 3842 transitions, 163316 flow, removed 309 selfloop flow, removed 179 redundant places. [2022-11-18 20:34:21,329 INFO L231 Difference]: Finished difference. Result has 1802 places, 3581 transitions, 154145 flow [2022-11-18 20:34:21,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=142037, PETRI_DIFFERENCE_MINUEND_PLACES=1691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1966, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=154145, PETRI_PLACES=1802, PETRI_TRANSITIONS=3581} [2022-11-18 20:34:21,332 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1723 predicate places. [2022-11-18 20:34:21,332 INFO L495 AbstractCegarLoop]: Abstraction has has 1802 places, 3581 transitions, 154145 flow [2022-11-18 20:34:21,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.578947368421055) internal successors, (1998), 38 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:21,333 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:34:21,333 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:21,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:21,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 20:34:21,540 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:34:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash -255365133, now seen corresponding path program 25 times [2022-11-18 20:34:21,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:21,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927815698] [2022-11-18 20:34:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:21,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:22,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927815698] [2022-11-18 20:34:22,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927815698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492143684] [2022-11-18 20:34:22,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:34:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:22,168 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:22,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56da2-c7a1-4301-aa8d-8d860cd39fbb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 20:34:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:22,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:34:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:23,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:23,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492143684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:23,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:23,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-11-18 20:34:23,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976572716] [2022-11-18 20:34:23,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:23,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:34:23,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:34:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:34:23,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-18 20:34:23,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1802 places, 3581 transitions, 154145 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:23,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:34:23,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-18 20:34:23,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand