./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a --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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- 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-b5237d8 [2022-11-21 14:00:39,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 14:00:39,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 14:00:39,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 14:00:39,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 14:00:39,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 14:00:39,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 14:00:39,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 14:00:39,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 14:00:39,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 14:00:39,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 14:00:39,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 14:00:39,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 14:00:39,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 14:00:39,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 14:00:39,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 14:00:39,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 14:00:39,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 14:00:39,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 14:00:39,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 14:00:39,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 14:00:39,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 14:00:39,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 14:00:39,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 14:00:39,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 14:00:39,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 14:00:39,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 14:00:39,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 14:00:39,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 14:00:39,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 14:00:39,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 14:00:39,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 14:00:39,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 14:00:39,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 14:00:39,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 14:00:39,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 14:00:39,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 14:00:39,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 14:00:39,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 14:00:39,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 14:00:39,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 14:00:39,128 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 14:00:39,177 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 14:00:39,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 14:00:39,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 14:00:39,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 14:00:39,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 14:00:39,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 14:00:39,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 14:00:39,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 14:00:39,181 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 14:00:39,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 14:00:39,183 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 14:00:39,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 14:00:39,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 14:00:39,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 14:00:39,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 14:00:39,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 14:00:39,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 14:00:39,185 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 14:00:39,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 14:00:39,185 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 14:00:39,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 14:00:39,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 14:00:39,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 14:00:39,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 14:00:39,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 14:00:39,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 14:00:39,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 14:00:39,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 14:00:39,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 14:00:39,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 14:00:39,189 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 14:00:39,189 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 14:00:39,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 14:00:39,190 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_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2022-11-21 14:00:39,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 14:00:39,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 14:00:39,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 14:00:39,598 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 14:00:39,598 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 14:00:39,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-21 14:00:42,663 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 14:00:42,904 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 14:00:42,905 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-21 14:00:42,913 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/data/3ef935bbf/322e449c5c6b41ccaf70337740c5f234/FLAG67a0267aa [2022-11-21 14:00:42,933 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/data/3ef935bbf/322e449c5c6b41ccaf70337740c5f234 [2022-11-21 14:00:42,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 14:00:42,940 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 14:00:42,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 14:00:42,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 14:00:42,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 14:00:42,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 02:00:42" (1/1) ... [2022-11-21 14:00:42,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e07bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:42, skipping insertion in model container [2022-11-21 14:00:42,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 02:00:42" (1/1) ... [2022-11-21 14:00:42,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 14:00:42,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 14:00:43,186 WARN L237 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_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-21 14:00:43,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 14:00:43,205 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 14:00:43,226 WARN L237 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_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-21 14:00:43,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 14:00:43,243 INFO L208 MainTranslator]: Completed translation [2022-11-21 14:00:43,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43 WrapperNode [2022-11-21 14:00:43,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 14:00:43,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 14:00:43,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 14:00:43,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 14:00:43,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (1/1) ... [2022-11-21 14:00:43,261 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (1/1) ... [2022-11-21 14:00:43,284 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2022-11-21 14:00:43,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 14:00:43,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 14:00:43,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 14:00:43,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 14:00:43,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (1/1) ... [2022-11-21 14:00:43,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (1/1) ... [2022-11-21 14:00:43,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (1/1) ... [2022-11-21 14:00:43,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (1/1) ... [2022-11-21 14:00:43,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (1/1) ... [2022-11-21 14:00:43,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (1/1) ... [2022-11-21 14:00:43,335 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (1/1) ... [2022-11-21 14:00:43,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (1/1) ... [2022-11-21 14:00:43,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 14:00:43,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 14:00:43,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 14:00:43,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 14:00:43,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (1/1) ... [2022-11-21 14:00:43,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 14:00:43,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:43,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 14:00:43,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 14:00:43,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 14:00:43,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 14:00:43,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 14:00:43,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 14:00:43,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 14:00:43,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 14:00:43,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 14:00:43,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 14:00:43,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 14:00:43,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 14:00:43,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 14:00:43,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 14:00:43,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 14:00:43,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 14:00:43,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 14:00:43,437 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 14:00:43,552 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 14:00:43,554 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 14:00:43,995 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 14:00:44,078 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 14:00:44,079 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 14:00:44,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 02:00:44 BoogieIcfgContainer [2022-11-21 14:00:44,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 14:00:44,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 14:00:44,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 14:00:44,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 14:00:44,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 02:00:42" (1/3) ... [2022-11-21 14:00:44,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f62c6c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 02:00:44, skipping insertion in model container [2022-11-21 14:00:44,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:00:43" (2/3) ... [2022-11-21 14:00:44,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f62c6c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 02:00:44, skipping insertion in model container [2022-11-21 14:00:44,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 02:00:44" (3/3) ... [2022-11-21 14:00:44,091 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-11-21 14:00:44,100 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 14:00:44,112 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 14:00:44,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 14:00:44,112 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 14:00:44,181 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 14:00:44,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 133 transitions, 282 flow [2022-11-21 14:00:44,303 INFO L130 PetriNetUnfolder]: 11/131 cut-off events. [2022-11-21 14:00:44,303 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 14:00:44,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 11/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-21 14:00:44,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 133 transitions, 282 flow [2022-11-21 14:00:44,314 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 122 transitions, 256 flow [2022-11-21 14:00:44,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 14:00:44,331 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;@330fc901, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 14:00:44,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-21 14:00:44,370 INFO L130 PetriNetUnfolder]: 11/121 cut-off events. [2022-11-21 14:00:44,371 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 14:00:44,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:00:44,372 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:44,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:00:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:44,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1382683983, now seen corresponding path program 1 times [2022-11-21 14:00:44,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:44,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017776745] [2022-11-21 14:00:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:44,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:44,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:44,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017776745] [2022-11-21 14:00:44,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017776745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:00:44,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:00:44,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 14:00:44,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310897993] [2022-11-21 14:00:44,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:00:44,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 14:00:44,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:44,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 14:00:44,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 14:00:44,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 133 [2022-11-21 14:00:44,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 256 flow. Second operand has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:44,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:00:44,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 133 [2022-11-21 14:00:44,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:00:44,807 INFO L130 PetriNetUnfolder]: 8/122 cut-off events. [2022-11-21 14:00:44,807 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-21 14:00:44,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 8/122 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 1 based on Foata normal form. 10/122 useless extension candidates. Maximal degree in co-relation 83. Up to 13 conditions per place. [2022-11-21 14:00:44,809 INFO L137 encePairwiseOnDemand]: 126/133 looper letters, 7 selfloop transitions, 0 changer transitions 3/115 dead transitions. [2022-11-21 14:00:44,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 256 flow [2022-11-21 14:00:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 14:00:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 14:00:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 250 transitions. [2022-11-21 14:00:44,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9398496240601504 [2022-11-21 14:00:44,824 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 250 transitions. [2022-11-21 14:00:44,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 250 transitions. [2022-11-21 14:00:44,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:00:44,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 250 transitions. [2022-11-21 14:00:44,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.0) internal successors, (250), 2 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:44,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:44,841 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:44,843 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 256 flow. Second operand 2 states and 250 transitions. [2022-11-21 14:00:44,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 256 flow [2022-11-21 14:00:44,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 115 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 14:00:44,858 INFO L231 Difference]: Finished difference. Result has 115 places, 112 transitions, 228 flow [2022-11-21 14:00:44,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=228, PETRI_PLACES=115, PETRI_TRANSITIONS=112} [2022-11-21 14:00:44,866 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, -3 predicate places. [2022-11-21 14:00:44,866 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 112 transitions, 228 flow [2022-11-21 14:00:44,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:44,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:00:44,868 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:44,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 14:00:44,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:00:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:44,870 INFO L85 PathProgramCache]: Analyzing trace with hash 882365775, now seen corresponding path program 1 times [2022-11-21 14:00:44,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:44,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380612691] [2022-11-21 14:00:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:44,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:45,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:45,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380612691] [2022-11-21 14:00:45,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380612691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:00:45,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:00:45,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 14:00:45,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699133762] [2022-11-21 14:00:45,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:00:45,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 14:00:45,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:45,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 14:00:45,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 14:00:45,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 133 [2022-11-21 14:00:45,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:45,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:00:45,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 133 [2022-11-21 14:00:45,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:00:45,592 INFO L130 PetriNetUnfolder]: 13/157 cut-off events. [2022-11-21 14:00:45,592 INFO L131 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-11-21 14:00:45,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 157 events. 13/157 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 253 event pairs, 1 based on Foata normal form. 2/149 useless extension candidates. Maximal degree in co-relation 199. Up to 19 conditions per place. [2022-11-21 14:00:45,594 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 23 selfloop transitions, 2 changer transitions 4/121 dead transitions. [2022-11-21 14:00:45,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 307 flow [2022-11-21 14:00:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 14:00:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 14:00:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2022-11-21 14:00:45,604 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2022-11-21 14:00:45,604 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2022-11-21 14:00:45,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2022-11-21 14:00:45,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:00:45,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2022-11-21 14:00:45,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:45,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:45,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:45,616 INFO L175 Difference]: Start difference. First operand has 115 places, 112 transitions, 228 flow. Second operand 5 states and 540 transitions. [2022-11-21 14:00:45,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 307 flow [2022-11-21 14:00:45,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 14:00:45,638 INFO L231 Difference]: Finished difference. Result has 119 places, 113 transitions, 244 flow [2022-11-21 14:00:45,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2022-11-21 14:00:45,639 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2022-11-21 14:00:45,640 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 244 flow [2022-11-21 14:00:45,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:45,641 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:00:45,641 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:45,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 14:00:45,641 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:00:45,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:45,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1024793816, now seen corresponding path program 1 times [2022-11-21 14:00:45,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:45,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375230772] [2022-11-21 14:00:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:45,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:45,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:45,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375230772] [2022-11-21 14:00:45,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375230772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:00:45,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:00:45,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 14:00:45,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281298596] [2022-11-21 14:00:45,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:00:45,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 14:00:45,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:45,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 14:00:45,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 14:00:45,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 133 [2022-11-21 14:00:45,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:45,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:00:45,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 133 [2022-11-21 14:00:45,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:00:46,050 INFO L130 PetriNetUnfolder]: 18/188 cut-off events. [2022-11-21 14:00:46,050 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-21 14:00:46,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 188 events. 18/188 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 349 event pairs, 3 based on Foata normal form. 3/175 useless extension candidates. Maximal degree in co-relation 240. Up to 30 conditions per place. [2022-11-21 14:00:46,052 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 14 selfloop transitions, 5 changer transitions 2/118 dead transitions. [2022-11-21 14:00:46,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 298 flow [2022-11-21 14:00:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 14:00:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 14:00:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2022-11-21 14:00:46,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8796992481203008 [2022-11-21 14:00:46,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2022-11-21 14:00:46,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2022-11-21 14:00:46,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:00:46,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2022-11-21 14:00:46,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:46,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:46,058 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:46,058 INFO L175 Difference]: Start difference. First operand has 119 places, 113 transitions, 244 flow. Second operand 3 states and 351 transitions. [2022-11-21 14:00:46,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 298 flow [2022-11-21 14:00:46,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 292 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-21 14:00:46,062 INFO L231 Difference]: Finished difference. Result has 117 places, 115 transitions, 263 flow [2022-11-21 14:00:46,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=117, PETRI_TRANSITIONS=115} [2022-11-21 14:00:46,064 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2022-11-21 14:00:46,064 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 263 flow [2022-11-21 14:00:46,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:46,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:00:46,065 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:46,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 14:00:46,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:00:46,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:46,066 INFO L85 PathProgramCache]: Analyzing trace with hash -677544406, now seen corresponding path program 1 times [2022-11-21 14:00:46,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:46,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454291874] [2022-11-21 14:00:46,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:46,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:46,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:46,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454291874] [2022-11-21 14:00:46,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454291874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:00:46,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:00:46,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 14:00:46,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903392528] [2022-11-21 14:00:46,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:00:46,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 14:00:46,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:46,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 14:00:46,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-21 14:00:46,689 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 133 [2022-11-21 14:00:46,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 115 transitions, 263 flow. Second operand has 10 states, 10 states have (on average 97.4) internal successors, (974), 10 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:46,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:00:46,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 133 [2022-11-21 14:00:46,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:00:47,177 INFO L130 PetriNetUnfolder]: 55/344 cut-off events. [2022-11-21 14:00:47,177 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2022-11-21 14:00:47,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 344 events. 55/344 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1376 event pairs, 15 based on Foata normal form. 6/312 useless extension candidates. Maximal degree in co-relation 544. Up to 64 conditions per place. [2022-11-21 14:00:47,182 INFO L137 encePairwiseOnDemand]: 121/133 looper letters, 33 selfloop transitions, 7 changer transitions 28/150 dead transitions. [2022-11-21 14:00:47,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 150 transitions, 490 flow [2022-11-21 14:00:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 14:00:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-21 14:00:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1113 transitions. [2022-11-21 14:00:47,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7607655502392344 [2022-11-21 14:00:47,208 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1113 transitions. [2022-11-21 14:00:47,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1113 transitions. [2022-11-21 14:00:47,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:00:47,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1113 transitions. [2022-11-21 14:00:47,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 101.18181818181819) internal successors, (1113), 11 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:47,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:47,216 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:47,216 INFO L175 Difference]: Start difference. First operand has 117 places, 115 transitions, 263 flow. Second operand 11 states and 1113 transitions. [2022-11-21 14:00:47,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 150 transitions, 490 flow [2022-11-21 14:00:47,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 150 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 14:00:47,220 INFO L231 Difference]: Finished difference. Result has 131 places, 115 transitions, 286 flow [2022-11-21 14:00:47,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=286, PETRI_PLACES=131, PETRI_TRANSITIONS=115} [2022-11-21 14:00:47,222 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 13 predicate places. [2022-11-21 14:00:47,222 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 115 transitions, 286 flow [2022-11-21 14:00:47,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.4) internal successors, (974), 10 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:47,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:00:47,224 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:47,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 14:00:47,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:00:47,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1671458293, now seen corresponding path program 1 times [2022-11-21 14:00:47,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:47,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533129859] [2022-11-21 14:00:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:47,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 14:00:47,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:47,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533129859] [2022-11-21 14:00:47,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533129859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:47,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555780014] [2022-11-21 14:00:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:47,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:47,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:47,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:47,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 14:00:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:47,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-21 14:00:47,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:49,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-21 14:00:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:49,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:00:49,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:00:49,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-11-21 14:00:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:51,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555780014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:00:51,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:00:51,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23, 17] total 38 [2022-11-21 14:00:51,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839879604] [2022-11-21 14:00:51,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:00:51,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-21 14:00:51,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-21 14:00:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 14:00:51,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2022-11-21 14:00:51,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 115 transitions, 286 flow. Second operand has 38 states, 38 states have (on average 72.39473684210526) internal successors, (2751), 38 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:51,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:00:51,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2022-11-21 14:00:51,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:00:52,747 INFO L130 PetriNetUnfolder]: 117/703 cut-off events. [2022-11-21 14:00:52,747 INFO L131 PetriNetUnfolder]: For 238/246 co-relation queries the response was YES. [2022-11-21 14:00:52,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1228 conditions, 703 events. 117/703 cut-off events. For 238/246 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3864 event pairs, 10 based on Foata normal form. 6/649 useless extension candidates. Maximal degree in co-relation 1217. Up to 86 conditions per place. [2022-11-21 14:00:52,753 INFO L137 encePairwiseOnDemand]: 103/133 looper letters, 71 selfloop transitions, 34 changer transitions 37/200 dead transitions. [2022-11-21 14:00:52,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 200 transitions, 832 flow [2022-11-21 14:00:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-21 14:00:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-21 14:00:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2491 transitions. [2022-11-21 14:00:52,762 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5508624502432552 [2022-11-21 14:00:52,762 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2491 transitions. [2022-11-21 14:00:52,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2491 transitions. [2022-11-21 14:00:52,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:00:52,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2491 transitions. [2022-11-21 14:00:52,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 73.26470588235294) internal successors, (2491), 34 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:52,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 133.0) internal successors, (4655), 35 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:52,783 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 133.0) internal successors, (4655), 35 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:52,783 INFO L175 Difference]: Start difference. First operand has 131 places, 115 transitions, 286 flow. Second operand 34 states and 2491 transitions. [2022-11-21 14:00:52,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 200 transitions, 832 flow [2022-11-21 14:00:52,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 200 transitions, 788 flow, removed 14 selfloop flow, removed 8 redundant places. [2022-11-21 14:00:52,792 INFO L231 Difference]: Finished difference. Result has 165 places, 130 transitions, 442 flow [2022-11-21 14:00:52,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=442, PETRI_PLACES=165, PETRI_TRANSITIONS=130} [2022-11-21 14:00:52,795 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 47 predicate places. [2022-11-21 14:00:52,795 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 130 transitions, 442 flow [2022-11-21 14:00:52,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 72.39473684210526) internal successors, (2751), 38 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:52,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:00:52,798 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:52,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 14:00:53,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:53,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:00:53,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:53,006 INFO L85 PathProgramCache]: Analyzing trace with hash 218243413, now seen corresponding path program 1 times [2022-11-21 14:00:53,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:53,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042949868] [2022-11-21 14:00:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:53,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 14:00:53,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:53,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042949868] [2022-11-21 14:00:53,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042949868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:00:53,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:00:53,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 14:00:53,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224692711] [2022-11-21 14:00:53,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:00:53,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 14:00:53,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 14:00:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 14:00:53,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2022-11-21 14:00:53,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 130 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:53,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:00:53,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2022-11-21 14:00:53,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:00:53,254 INFO L130 PetriNetUnfolder]: 53/404 cut-off events. [2022-11-21 14:00:53,254 INFO L131 PetriNetUnfolder]: For 172/172 co-relation queries the response was YES. [2022-11-21 14:00:53,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 404 events. 53/404 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1549 event pairs, 3 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 675. Up to 89 conditions per place. [2022-11-21 14:00:53,257 INFO L137 encePairwiseOnDemand]: 130/133 looper letters, 21 selfloop transitions, 2 changer transitions 6/134 dead transitions. [2022-11-21 14:00:53,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 134 transitions, 502 flow [2022-11-21 14:00:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 14:00:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 14:00:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2022-11-21 14:00:53,259 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9022556390977443 [2022-11-21 14:00:53,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2022-11-21 14:00:53,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2022-11-21 14:00:53,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:00:53,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2022-11-21 14:00:53,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:53,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:53,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:53,263 INFO L175 Difference]: Start difference. First operand has 165 places, 130 transitions, 442 flow. Second operand 3 states and 360 transitions. [2022-11-21 14:00:53,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 134 transitions, 502 flow [2022-11-21 14:00:53,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 134 transitions, 445 flow, removed 11 selfloop flow, removed 20 redundant places. [2022-11-21 14:00:53,271 INFO L231 Difference]: Finished difference. Result has 142 places, 123 transitions, 350 flow [2022-11-21 14:00:53,273 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=142, PETRI_TRANSITIONS=123} [2022-11-21 14:00:53,277 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 24 predicate places. [2022-11-21 14:00:53,277 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 123 transitions, 350 flow [2022-11-21 14:00:53,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:53,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:00:53,278 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:53,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 14:00:53,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:00:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:53,281 INFO L85 PathProgramCache]: Analyzing trace with hash 458806931, now seen corresponding path program 2 times [2022-11-21 14:00:53,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:53,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957993111] [2022-11-21 14:00:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:53,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 14:00:53,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:53,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957993111] [2022-11-21 14:00:53,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957993111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:53,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349315927] [2022-11-21 14:00:53,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 14:00:53,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:53,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:53,534 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:53,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 14:00:53,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 14:00:53,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:00:53,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 14:00:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 14:00:53,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 14:00:53,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349315927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:00:53,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 14:00:53,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-21 14:00:53,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580297114] [2022-11-21 14:00:53,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:00:53,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 14:00:53,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 14:00:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 14:00:53,804 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 133 [2022-11-21 14:00:53,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 123 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:53,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:00:53,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 133 [2022-11-21 14:00:53,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:00:53,918 INFO L130 PetriNetUnfolder]: 54/468 cut-off events. [2022-11-21 14:00:53,918 INFO L131 PetriNetUnfolder]: For 190/194 co-relation queries the response was YES. [2022-11-21 14:00:53,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 468 events. 54/468 cut-off events. For 190/194 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1908 event pairs, 9 based on Foata normal form. 4/451 useless extension candidates. Maximal degree in co-relation 747. Up to 60 conditions per place. [2022-11-21 14:00:53,922 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 22 selfloop transitions, 11 changer transitions 0/138 dead transitions. [2022-11-21 14:00:53,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 138 transitions, 487 flow [2022-11-21 14:00:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 14:00:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 14:00:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2022-11-21 14:00:53,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8947368421052632 [2022-11-21 14:00:53,925 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2022-11-21 14:00:53,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2022-11-21 14:00:53,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:00:53,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2022-11-21 14:00:53,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:53,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:53,929 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:53,929 INFO L175 Difference]: Start difference. First operand has 142 places, 123 transitions, 350 flow. Second operand 4 states and 476 transitions. [2022-11-21 14:00:53,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 138 transitions, 487 flow [2022-11-21 14:00:53,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 138 transitions, 477 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-21 14:00:53,933 INFO L231 Difference]: Finished difference. Result has 137 places, 132 transitions, 454 flow [2022-11-21 14:00:53,934 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=454, PETRI_PLACES=137, PETRI_TRANSITIONS=132} [2022-11-21 14:00:53,934 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 19 predicate places. [2022-11-21 14:00:53,935 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 132 transitions, 454 flow [2022-11-21 14:00:53,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:53,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:00:53,936 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:53,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 14:00:54,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 14:00:54,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:00:54,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1877919315, now seen corresponding path program 3 times [2022-11-21 14:00:54,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:54,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588220786] [2022-11-21 14:00:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 14:00:54,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:54,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588220786] [2022-11-21 14:00:54,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588220786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:00:54,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:00:54,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 14:00:54,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585272213] [2022-11-21 14:00:54,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:00:54,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 14:00:54,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:54,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 14:00:54,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 14:00:54,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2022-11-21 14:00:54,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 132 transitions, 454 flow. Second operand has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:54,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:00:54,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2022-11-21 14:00:54,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:00:54,653 INFO L130 PetriNetUnfolder]: 86/779 cut-off events. [2022-11-21 14:00:54,653 INFO L131 PetriNetUnfolder]: For 521/521 co-relation queries the response was YES. [2022-11-21 14:00:54,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 779 events. 86/779 cut-off events. For 521/521 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4461 event pairs, 13 based on Foata normal form. 26/764 useless extension candidates. Maximal degree in co-relation 1313. Up to 98 conditions per place. [2022-11-21 14:00:54,660 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 32 selfloop transitions, 4 changer transitions 1/142 dead transitions. [2022-11-21 14:00:54,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 142 transitions, 601 flow [2022-11-21 14:00:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 14:00:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 14:00:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2022-11-21 14:00:54,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8909774436090225 [2022-11-21 14:00:54,664 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2022-11-21 14:00:54,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2022-11-21 14:00:54,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:00:54,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2022-11-21 14:00:54,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:54,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:54,668 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:54,668 INFO L175 Difference]: Start difference. First operand has 137 places, 132 transitions, 454 flow. Second operand 4 states and 474 transitions. [2022-11-21 14:00:54,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 142 transitions, 601 flow [2022-11-21 14:00:54,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 142 transitions, 589 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-21 14:00:54,674 INFO L231 Difference]: Finished difference. Result has 142 places, 132 transitions, 457 flow [2022-11-21 14:00:54,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=457, PETRI_PLACES=142, PETRI_TRANSITIONS=132} [2022-11-21 14:00:54,677 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 24 predicate places. [2022-11-21 14:00:54,678 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 132 transitions, 457 flow [2022-11-21 14:00:54,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:54,678 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:00:54,679 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:54,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 14:00:54,679 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:00:54,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:54,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1075862869, now seen corresponding path program 1 times [2022-11-21 14:00:54,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:54,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47426928] [2022-11-21 14:00:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:54,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 14:00:55,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:55,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47426928] [2022-11-21 14:00:55,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47426928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:55,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429933270] [2022-11-21 14:00:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:55,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:55,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:55,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:55,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 14:00:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-21 14:00:55,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:57,544 INFO L321 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-11-21 14:00:57,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2022-11-21 14:00:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:57,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:00:58,296 INFO L321 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-11-21 14:00:58,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 66 [2022-11-21 14:01:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:01:01,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429933270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:01:01,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:01:01,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 24, 23] total 47 [2022-11-21 14:01:01,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155383321] [2022-11-21 14:01:01,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:01:01,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-21 14:01:01,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:01:01,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-21 14:01:01,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2022-11-21 14:01:01,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 133 [2022-11-21 14:01:01,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 132 transitions, 457 flow. Second operand has 47 states, 47 states have (on average 75.12765957446808) internal successors, (3531), 47 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:01,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:01:01,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 133 [2022-11-21 14:01:01,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:01:13,548 INFO L130 PetriNetUnfolder]: 1911/7704 cut-off events. [2022-11-21 14:01:13,548 INFO L131 PetriNetUnfolder]: For 8540/8540 co-relation queries the response was YES. [2022-11-21 14:01:13,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15910 conditions, 7704 events. 1911/7704 cut-off events. For 8540/8540 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 75800 event pairs, 168 based on Foata normal form. 60/7318 useless extension candidates. Maximal degree in co-relation 15890. Up to 666 conditions per place. [2022-11-21 14:01:13,604 INFO L137 encePairwiseOnDemand]: 106/133 looper letters, 307 selfloop transitions, 174 changer transitions 144/689 dead transitions. [2022-11-21 14:01:13,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 689 transitions, 3907 flow [2022-11-21 14:01:13,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-21 14:01:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2022-11-21 14:01:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 7778 transitions. [2022-11-21 14:01:13,621 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.584812030075188 [2022-11-21 14:01:13,621 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 7778 transitions. [2022-11-21 14:01:13,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 7778 transitions. [2022-11-21 14:01:13,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:01:13,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 7778 transitions. [2022-11-21 14:01:13,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 77.78) internal successors, (7778), 100 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:13,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 133.0) internal successors, (13433), 101 states have internal predecessors, (13433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:13,742 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 133.0) internal successors, (13433), 101 states have internal predecessors, (13433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:13,742 INFO L175 Difference]: Start difference. First operand has 142 places, 132 transitions, 457 flow. Second operand 100 states and 7778 transitions. [2022-11-21 14:01:13,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 689 transitions, 3907 flow [2022-11-21 14:01:13,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 689 transitions, 3902 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-21 14:01:13,766 INFO L231 Difference]: Finished difference. Result has 306 places, 294 transitions, 2421 flow [2022-11-21 14:01:13,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=2421, PETRI_PLACES=306, PETRI_TRANSITIONS=294} [2022-11-21 14:01:13,768 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 188 predicate places. [2022-11-21 14:01:13,768 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 294 transitions, 2421 flow [2022-11-21 14:01:13,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 75.12765957446808) internal successors, (3531), 47 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:13,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:01:13,770 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:01:13,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 14:01:13,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:01:13,976 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:01:13,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:01:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash -447397527, now seen corresponding path program 2 times [2022-11-21 14:01:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:01:13,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396924103] [2022-11-21 14:01:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:01:13,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:01:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 14:01:14,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:01:14,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396924103] [2022-11-21 14:01:14,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396924103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:01:14,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487081235] [2022-11-21 14:01:14,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 14:01:14,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:01:14,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:01:14,995 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:01:15,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 14:01:15,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 14:01:15,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:01:15,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-21 14:01:15,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:01:16,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 14:01:16,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 14:01:16,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 14:01:17,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:01:17,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-11-21 14:01:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:01:17,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:01:19,797 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~back~0 1))) (or (< .cse0 0) (<= c_~n~0 c_~front~0) (let ((.cse8 (* c_~front~0 4)) (.cse7 (* c_~back~0 4))) (let ((.cse2 (+ .cse7 |c_ULTIMATE.start_main_#t~ret11#1.offset| 4)) (.cse3 (+ .cse8 |c_ULTIMATE.start_main_#t~ret11#1.offset| 4)) (.cse4 (+ .cse8 |c_ULTIMATE.start_main_#t~ret11#1.offset|)) (.cse5 (+ .cse7 |c_ULTIMATE.start_main_#t~ret11#1.offset|))) (and (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_#t~ret11#1.base|))) (or (not (= (+ (select .cse1 .cse2) 1) 0)) (not (< (+ c_~sum~0 (select .cse1 .cse3) (select .cse1 .cse4)) 0)) (not (= (select .cse1 .cse5) 1))))) (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_#t~ret11#1.base|))) (or (not (= (+ (select .cse6 .cse2) 1) 0)) (not (< 1 (+ c_~sum~0 (select .cse6 .cse3) (select .cse6 .cse4)))) (not (= (select .cse6 .cse5) 1)))))))) (<= c_~n~0 .cse0) (< c_~front~0 0))) is different from false [2022-11-21 14:01:20,088 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~back~0 1))) (or (< .cse0 0) (<= c_~n~0 c_~front~0) (let ((.cse7 (* c_~back~0 4)) (.cse8 (* c_~front~0 4))) (let ((.cse4 (+ .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ .cse8 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ .cse7 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse3 (+ .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (+ (select .cse1 .cse2) 1) 0)) (not (= (select .cse1 .cse3) 1)) (not (< 1 (+ c_~sum~0 (select .cse1 .cse4) (select .cse1 .cse5))))))) (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (< (+ c_~sum~0 (select .cse6 .cse4) (select .cse6 .cse5)) 0)) (not (= (+ (select .cse6 .cse2) 1) 0)) (not (= (select .cse6 .cse3) 1)))))))) (<= c_~n~0 .cse0) (< c_~front~0 0))) is different from false [2022-11-21 14:01:20,382 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~back~0 1))) (or (< (+ |c_ULTIMATE.start_create_fresh_int_array_#t~post19#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< .cse0 0) (<= c_~n~0 c_~front~0) (let ((.cse7 (* c_~back~0 4)) (.cse8 (* c_~front~0 4))) (let ((.cse4 (+ .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ .cse8 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ .cse7 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse3 (+ .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (+ (select .cse1 .cse2) 1) 0)) (not (= (select .cse1 .cse3) 1)) (not (< 1 (+ c_~sum~0 (select .cse1 .cse4) (select .cse1 .cse5))))))) (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (< (+ c_~sum~0 (select .cse6 .cse4) (select .cse6 .cse5)) 0)) (not (= (+ (select .cse6 .cse2) 1) 0)) (not (= (select .cse6 .cse3) 1)))))))) (<= c_~n~0 .cse0) (< c_~front~0 0))) is different from false [2022-11-21 14:01:20,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:01:20,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2022-11-21 14:01:20,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:01:20,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 289 [2022-11-21 14:01:20,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:01:20,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 237 [2022-11-21 14:01:20,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:01:20,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 211 [2022-11-21 14:01:22,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:01:22,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2022-11-21 14:01:22,977 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-21 14:01:22,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 245 [2022-11-21 14:01:23,008 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-21 14:01:23,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 193 [2022-11-21 14:01:23,034 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-21 14:01:23,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 167 [2022-11-21 14:01:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-21 14:01:24,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487081235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:01:24,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:01:24,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 33, 29] total 62 [2022-11-21 14:01:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262731760] [2022-11-21 14:01:24,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:01:24,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-21 14:01:24,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:01:24,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-21 14:01:24,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=2715, Unknown=39, NotChecked=348, Total=3782 [2022-11-21 14:01:24,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-11-21 14:01:24,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 294 transitions, 2421 flow. Second operand has 62 states, 62 states have (on average 60.854838709677416) internal successors, (3773), 62 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:24,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:01:24,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-11-21 14:01:24,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:01:24,994 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse24 (+ c_~back~0 1)) (.cse19 (* c_~front~0 4)) (.cse20 (* c_~back~0 4))) (let ((.cse10 (+ c_~queue~0.offset .cse20)) (.cse7 (+ c_~queue~0.offset .cse19)) (.cse8 (+ c_~queue~0.offset .cse19 4)) (.cse11 (+ c_~queue~0.offset .cse20 4)) (.cse0 (< .cse24 0)) (.cse23 (< (+ |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse1 (<= c_~n~0 c_~front~0)) (.cse2 (and (<= 0 c_~sum~0) (<= c_~sum~0 1) (= .cse19 .cse20))) (.cse3 (<= c_~n~0 .cse24)) (.cse4 (< c_~front~0 0))) (and (or .cse0 .cse1 .cse2 .cse3 (< 2 |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (not (< 1 |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) .cse4) (or .cse1 (let ((.cse5 (let ((.cse6 (select |c_#memory_int| c_~queue~0.base))) (+ c_~sum~0 (select .cse6 .cse7) (select .cse6 .cse8))))) (and (not (< 1 .cse5)) (not (< .cse5 0)))) .cse4) (or (and (forall ((v_ArrVal_178 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) c_~queue~0.base))) (or (not (= (select .cse9 .cse10) 1)) (not (= (+ (select .cse9 .cse11) 1) 0)) (not (< 1 (+ c_~sum~0 (select .cse9 .cse8) (select .cse9 .cse7))))))) (forall ((v_ArrVal_178 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) c_~queue~0.base))) (or (not (= (select .cse12 .cse10) 1)) (not (= (+ (select .cse12 .cse11) 1) 0)) (not (< (+ c_~sum~0 (select .cse12 .cse8) (select .cse12 .cse7)) 0)))))) .cse0 .cse1 .cse3 .cse4) (or .cse0 (< 2 |c_ULTIMATE.start_create_fresh_int_array_#in~size#1|) .cse1 .cse2 .cse3 .cse4) (or .cse0 .cse1 .cse2 (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_#t~post19#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (not (< (+ |c_ULTIMATE.start_create_fresh_int_array_#t~post19#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) .cse3 .cse4) (or (let ((.cse14 (+ .cse20 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) (.cse15 (+ .cse20 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) (.cse16 (+ .cse19 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) (.cse17 (+ .cse19 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4))) (and (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse13 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (or (not (= 0 (+ (select .cse13 .cse14) 1))) (not (= (select .cse13 .cse15) 1)) (not (< 1 (+ c_~sum~0 (select .cse13 .cse16) (select .cse13 .cse17))))))) (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse18 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (or (not (= 0 (+ (select .cse18 .cse14) 1))) (not (= (select .cse18 .cse15) 1)) (not (< (+ c_~sum~0 (select .cse18 .cse16) (select .cse18 .cse17)) 0))))))) .cse0 .cse1 .cse3 .cse4) (or .cse0 .cse1 (and (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse21 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) c_~queue~0.base))) (or (not (= (select .cse21 .cse10) 1)) (not (= (+ (select .cse21 .cse11) 1) 0)) (not (< (+ c_~sum~0 (select .cse21 .cse7) (select .cse21 .cse8)) 0))))) (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse22 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_178) c_~queue~0.base))) (or (not (= (select .cse22 .cse10) 1)) (not (< 1 (+ c_~sum~0 (select .cse22 .cse7) (select .cse22 .cse8)))) (not (= (+ (select .cse22 .cse11) 1) 0)))))) .cse3 .cse4) (or .cse0 .cse23 .cse1 .cse2 .cse3 .cse4) (or .cse0 (not .cse23) .cse1 .cse2 .cse3 .cse4 (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (= c_~sum~0 0)))) is different from false [2022-11-21 14:01:36,814 INFO L130 PetriNetUnfolder]: 2758/9853 cut-off events. [2022-11-21 14:01:36,814 INFO L131 PetriNetUnfolder]: For 80516/80620 co-relation queries the response was YES. [2022-11-21 14:01:36,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35843 conditions, 9853 events. 2758/9853 cut-off events. For 80516/80620 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 100759 event pairs, 456 based on Foata normal form. 117/9444 useless extension candidates. Maximal degree in co-relation 35757. Up to 1812 conditions per place. [2022-11-21 14:01:36,941 INFO L137 encePairwiseOnDemand]: 98/133 looper letters, 290 selfloop transitions, 210 changer transitions 90/644 dead transitions. [2022-11-21 14:01:36,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 644 transitions, 6966 flow [2022-11-21 14:01:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-21 14:01:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-21 14:01:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4074 transitions. [2022-11-21 14:01:36,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4786184210526316 [2022-11-21 14:01:36,949 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4074 transitions. [2022-11-21 14:01:36,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4074 transitions. [2022-11-21 14:01:36,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:01:36,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4074 transitions. [2022-11-21 14:01:36,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 63.65625) internal successors, (4074), 64 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:36,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 133.0) internal successors, (8645), 65 states have internal predecessors, (8645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:36,975 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 133.0) internal successors, (8645), 65 states have internal predecessors, (8645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:36,975 INFO L175 Difference]: Start difference. First operand has 306 places, 294 transitions, 2421 flow. Second operand 64 states and 4074 transitions. [2022-11-21 14:01:36,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 644 transitions, 6966 flow [2022-11-21 14:01:37,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 644 transitions, 6291 flow, removed 311 selfloop flow, removed 41 redundant places. [2022-11-21 14:01:37,299 INFO L231 Difference]: Finished difference. Result has 333 places, 378 transitions, 3589 flow [2022-11-21 14:01:37,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2052, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=3589, PETRI_PLACES=333, PETRI_TRANSITIONS=378} [2022-11-21 14:01:37,301 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 215 predicate places. [2022-11-21 14:01:37,302 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 378 transitions, 3589 flow [2022-11-21 14:01:37,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 60.854838709677416) internal successors, (3773), 62 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:37,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:01:37,304 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:01:37,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 14:01:37,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 14:01:37,512 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:01:37,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:01:37,513 INFO L85 PathProgramCache]: Analyzing trace with hash 683164538, now seen corresponding path program 3 times [2022-11-21 14:01:37,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:01:37,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822844606] [2022-11-21 14:01:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:01:37,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:01:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 14:01:37,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:01:37,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822844606] [2022-11-21 14:01:37,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822844606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:01:37,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774560073] [2022-11-21 14:01:37,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 14:01:37,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:01:37,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:01:37,826 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:01:37,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 14:01:38,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 14:01:38,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:01:38,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 14:01:38,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:01:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 14:01:38,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:01:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 14:01:38,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774560073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:01:38,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:01:38,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 10 [2022-11-21 14:01:38,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128873142] [2022-11-21 14:01:38,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:01:38,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 14:01:38,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:01:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 14:01:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-21 14:01:38,647 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 133 [2022-11-21 14:01:38,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 378 transitions, 3589 flow. Second operand has 10 states, 10 states have (on average 115.5) internal successors, (1155), 10 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:38,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:01:38,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 133 [2022-11-21 14:01:38,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:01:40,609 INFO L130 PetriNetUnfolder]: 675/5963 cut-off events. [2022-11-21 14:01:40,610 INFO L131 PetriNetUnfolder]: For 58073/58227 co-relation queries the response was YES. [2022-11-21 14:01:40,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20640 conditions, 5963 events. 675/5963 cut-off events. For 58073/58227 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 66864 event pairs, 127 based on Foata normal form. 102/5763 useless extension candidates. Maximal degree in co-relation 20552. Up to 816 conditions per place. [2022-11-21 14:01:40,661 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 196 selfloop transitions, 169 changer transitions 0/503 dead transitions. [2022-11-21 14:01:40,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 503 transitions, 5766 flow [2022-11-21 14:01:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 14:01:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 14:01:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2022-11-21 14:01:40,664 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8872180451127819 [2022-11-21 14:01:40,664 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2022-11-21 14:01:40,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2022-11-21 14:01:40,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:01:40,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2022-11-21 14:01:40,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:40,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:40,670 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:40,670 INFO L175 Difference]: Start difference. First operand has 333 places, 378 transitions, 3589 flow. Second operand 6 states and 708 transitions. [2022-11-21 14:01:40,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 503 transitions, 5766 flow [2022-11-21 14:01:40,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 503 transitions, 5327 flow, removed 180 selfloop flow, removed 38 redundant places. [2022-11-21 14:01:40,950 INFO L231 Difference]: Finished difference. Result has 295 places, 481 transitions, 5281 flow [2022-11-21 14:01:40,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=3215, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5281, PETRI_PLACES=295, PETRI_TRANSITIONS=481} [2022-11-21 14:01:40,952 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 177 predicate places. [2022-11-21 14:01:40,952 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 481 transitions, 5281 flow [2022-11-21 14:01:40,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 115.5) internal successors, (1155), 10 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:40,952 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:01:40,953 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:01:40,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 14:01:41,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:01:41,165 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:01:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:01:41,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1747577136, now seen corresponding path program 4 times [2022-11-21 14:01:41,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:01:41,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728955723] [2022-11-21 14:01:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:01:41,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:01:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 14:01:41,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:01:41,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728955723] [2022-11-21 14:01:41,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728955723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:01:41,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529732027] [2022-11-21 14:01:41,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 14:01:41,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:01:41,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:01:41,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:01:41,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 14:01:42,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 14:01:42,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:01:42,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 14:01:42,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:01:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 14:01:42,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:01:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 14:01:43,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529732027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:01:43,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:01:43,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 35 [2022-11-21 14:01:43,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521409259] [2022-11-21 14:01:43,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:01:43,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 14:01:43,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:01:43,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 14:01:43,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 14:01:43,231 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2022-11-21 14:01:43,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 481 transitions, 5281 flow. Second operand has 35 states, 35 states have (on average 97.25714285714285) internal successors, (3404), 35 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:43,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:01:43,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2022-11-21 14:01:43,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:01:45,862 INFO L130 PetriNetUnfolder]: 636/3823 cut-off events. [2022-11-21 14:01:45,862 INFO L131 PetriNetUnfolder]: For 37349/37383 co-relation queries the response was YES. [2022-11-21 14:01:45,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13079 conditions, 3823 events. 636/3823 cut-off events. For 37349/37383 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 37507 event pairs, 333 based on Foata normal form. 102/3661 useless extension candidates. Maximal degree in co-relation 12995. Up to 994 conditions per place. [2022-11-21 14:01:45,905 INFO L137 encePairwiseOnDemand]: 116/133 looper letters, 92 selfloop transitions, 15 changer transitions 116/306 dead transitions. [2022-11-21 14:01:45,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 306 transitions, 3198 flow [2022-11-21 14:01:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 14:01:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-21 14:01:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2554 transitions. [2022-11-21 14:01:45,911 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7385772122614228 [2022-11-21 14:01:45,911 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2554 transitions. [2022-11-21 14:01:45,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2554 transitions. [2022-11-21 14:01:45,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:01:45,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2554 transitions. [2022-11-21 14:01:45,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 98.23076923076923) internal successors, (2554), 26 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:45,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 133.0) internal successors, (3591), 27 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:45,924 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 133.0) internal successors, (3591), 27 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:45,924 INFO L175 Difference]: Start difference. First operand has 295 places, 481 transitions, 5281 flow. Second operand 26 states and 2554 transitions. [2022-11-21 14:01:45,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 306 transitions, 3198 flow [2022-11-21 14:01:46,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 306 transitions, 2889 flow, removed 123 selfloop flow, removed 22 redundant places. [2022-11-21 14:01:46,140 INFO L231 Difference]: Finished difference. Result has 278 places, 186 transitions, 1290 flow [2022-11-21 14:01:46,141 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1290, PETRI_PLACES=278, PETRI_TRANSITIONS=186} [2022-11-21 14:01:46,142 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 160 predicate places. [2022-11-21 14:01:46,142 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 186 transitions, 1290 flow [2022-11-21 14:01:46,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 97.25714285714285) internal successors, (3404), 35 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:46,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:01:46,144 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:01:46,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 14:01:46,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 14:01:46,349 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:01:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:01:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1063507427, now seen corresponding path program 5 times [2022-11-21 14:01:46,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:01:46,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11883637] [2022-11-21 14:01:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:01:46,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:01:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 14:01:47,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:01:47,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11883637] [2022-11-21 14:01:47,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11883637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:01:47,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999898324] [2022-11-21 14:01:47,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 14:01:47,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:01:47,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:01:47,477 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:01:47,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 14:01:47,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-21 14:01:47,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:01:47,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-21 14:01:47,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:01:49,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 14:01:50,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 14:01:50,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 14:01:50,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 14:01:50,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 14:01:50,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:01:50,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 27 [2022-11-21 14:01:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:01:50,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:01:51,459 INFO L321 Elim1Store]: treesize reduction 42, result has 65.3 percent of original size [2022-11-21 14:01:51,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 110 [2022-11-21 14:01:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:01:53,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999898324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:01:53,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:01:53,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 30, 25] total 57 [2022-11-21 14:01:53,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804101603] [2022-11-21 14:01:53,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:01:53,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-21 14:01:53,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:01:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-21 14:01:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=2697, Unknown=0, NotChecked=0, Total=3192 [2022-11-21 14:01:53,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2022-11-21 14:01:53,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 186 transitions, 1290 flow. Second operand has 57 states, 57 states have (on average 68.42105263157895) internal successors, (3900), 57 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:53,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:01:53,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2022-11-21 14:01:53,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:02:29,866 INFO L130 PetriNetUnfolder]: 5820/21004 cut-off events. [2022-11-21 14:02:29,867 INFO L131 PetriNetUnfolder]: For 181187/181195 co-relation queries the response was YES. [2022-11-21 14:02:30,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80495 conditions, 21004 events. 5820/21004 cut-off events. For 181187/181195 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 247502 event pairs, 610 based on Foata normal form. 118/20104 useless extension candidates. Maximal degree in co-relation 80427. Up to 2406 conditions per place. [2022-11-21 14:02:30,107 INFO L137 encePairwiseOnDemand]: 105/133 looper letters, 591 selfloop transitions, 584 changer transitions 434/1666 dead transitions. [2022-11-21 14:02:30,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1666 transitions, 18540 flow [2022-11-21 14:02:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-11-21 14:02:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2022-11-21 14:02:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 17855 transitions. [2022-11-21 14:02:30,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5285359066958736 [2022-11-21 14:02:30,133 INFO L72 ComplementDD]: Start complementDD. Operand 254 states and 17855 transitions. [2022-11-21 14:02:30,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 254 states and 17855 transitions. [2022-11-21 14:02:30,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:02:30,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 254 states and 17855 transitions. [2022-11-21 14:02:30,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 255 states, 254 states have (on average 70.29527559055119) internal successors, (17855), 254 states have internal predecessors, (17855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:02:30,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 255 states, 255 states have (on average 133.0) internal successors, (33915), 255 states have internal predecessors, (33915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:02:30,226 INFO L81 ComplementDD]: Finished complementDD. Result has 255 states, 255 states have (on average 133.0) internal successors, (33915), 255 states have internal predecessors, (33915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:02:30,227 INFO L175 Difference]: Start difference. First operand has 278 places, 186 transitions, 1290 flow. Second operand 254 states and 17855 transitions. [2022-11-21 14:02:30,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 1666 transitions, 18540 flow [2022-11-21 14:02:30,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 1666 transitions, 13925 flow, removed 2279 selfloop flow, removed 46 redundant places. [2022-11-21 14:02:30,539 INFO L231 Difference]: Finished difference. Result has 636 places, 716 transitions, 9966 flow [2022-11-21 14:02:30,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=254, PETRI_FLOW=9966, PETRI_PLACES=636, PETRI_TRANSITIONS=716} [2022-11-21 14:02:30,540 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 518 predicate places. [2022-11-21 14:02:30,540 INFO L495 AbstractCegarLoop]: Abstraction has has 636 places, 716 transitions, 9966 flow [2022-11-21 14:02:30,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 68.42105263157895) internal successors, (3900), 57 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:02:30,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:02:30,542 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:02:30,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 14:02:30,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 14:02:30,748 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:02:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:02:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash -685454561, now seen corresponding path program 6 times [2022-11-21 14:02:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:02:30,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132521457] [2022-11-21 14:02:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:02:30,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:02:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:02:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:02:35,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:02:35,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132521457] [2022-11-21 14:02:35,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132521457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:02:35,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725507332] [2022-11-21 14:02:35,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 14:02:35,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:02:35,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:02:35,953 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:02:35,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 14:02:36,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-21 14:02:36,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:02:36,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-21 14:02:36,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:02:37,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:02:37,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 18 [2022-11-21 14:02:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 14:02:37,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:02:38,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:02:38,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 150 [2022-11-21 14:02:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 14:02:39,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725507332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:02:39,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:02:39,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 16, 12] total 52 [2022-11-21 14:02:39,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101728575] [2022-11-21 14:02:39,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:02:39,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-21 14:02:39,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:02:39,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-21 14:02:39,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2022-11-21 14:02:39,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-11-21 14:02:39,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 716 transitions, 9966 flow. Second operand has 52 states, 52 states have (on average 61.86538461538461) internal successors, (3217), 52 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:02:39,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:02:39,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-11-21 14:02:39,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:39,290 INFO L130 PetriNetUnfolder]: 7067/26813 cut-off events. [2022-11-21 14:03:39,291 INFO L131 PetriNetUnfolder]: For 1139550/1139646 co-relation queries the response was YES. [2022-11-21 14:03:40,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145578 conditions, 26813 events. 7067/26813 cut-off events. For 1139550/1139646 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 334651 event pairs, 1244 based on Foata normal form. 540/25893 useless extension candidates. Maximal degree in co-relation 145339. Up to 2738 conditions per place. [2022-11-21 14:03:40,474 INFO L137 encePairwiseOnDemand]: 106/133 looper letters, 602 selfloop transitions, 659 changer transitions 687/2002 dead transitions. [2022-11-21 14:03:40,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 2002 transitions, 34337 flow [2022-11-21 14:03:40,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2022-11-21 14:03:40,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2022-11-21 14:03:40,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 15936 transitions. [2022-11-21 14:03:40,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4773687206062966 [2022-11-21 14:03:40,650 INFO L72 ComplementDD]: Start complementDD. Operand 251 states and 15936 transitions. [2022-11-21 14:03:40,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 251 states and 15936 transitions. [2022-11-21 14:03:40,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:40,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 251 states and 15936 transitions. [2022-11-21 14:03:40,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 252 states, 251 states have (on average 63.49003984063745) internal successors, (15936), 251 states have internal predecessors, (15936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:40,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 252 states, 252 states have (on average 133.0) internal successors, (33516), 252 states have internal predecessors, (33516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:40,729 INFO L81 ComplementDD]: Finished complementDD. Result has 252 states, 252 states have (on average 133.0) internal successors, (33516), 252 states have internal predecessors, (33516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:40,729 INFO L175 Difference]: Start difference. First operand has 636 places, 716 transitions, 9966 flow. Second operand 251 states and 15936 transitions. [2022-11-21 14:03:40,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 2002 transitions, 34337 flow [2022-11-21 14:03:45,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 2002 transitions, 23830 flow, removed 4901 selfloop flow, removed 157 redundant places. [2022-11-21 14:03:45,292 INFO L231 Difference]: Finished difference. Result has 778 places, 894 transitions, 13001 flow [2022-11-21 14:03:45,293 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=4617, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=251, PETRI_FLOW=13001, PETRI_PLACES=778, PETRI_TRANSITIONS=894} [2022-11-21 14:03:45,293 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 660 predicate places. [2022-11-21 14:03:45,294 INFO L495 AbstractCegarLoop]: Abstraction has has 778 places, 894 transitions, 13001 flow [2022-11-21 14:03:45,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 61.86538461538461) internal successors, (3217), 52 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:45,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:45,295 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:45,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 14:03:45,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:03:45,502 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 14:03:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2103832535, now seen corresponding path program 7 times [2022-11-21 14:03:45,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:45,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718677638] [2022-11-21 14:03:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:45,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 14:03:46,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:46,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718677638] [2022-11-21 14:03:46,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718677638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:03:46,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639314457] [2022-11-21 14:03:46,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 14:03:46,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:03:46,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:03:46,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:03:46,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce6ebe4e-c63a-4eb0-bbb8-bbb44315fc29/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 14:03:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:47,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-21 14:03:47,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:03:48,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:03:48,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 18 [2022-11-21 14:03:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:03:49,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:03:50,114 INFO L321 Elim1Store]: treesize reduction 14, result has 88.4 percent of original size [2022-11-21 14:03:50,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 138 [2022-11-21 14:03:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:03:52,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639314457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:03:52,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:03:52,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26, 25] total 53 [2022-11-21 14:03:52,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243609257] [2022-11-21 14:03:52,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:03:52,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 14:03:52,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 14:03:52,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=2160, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 14:03:52,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2022-11-21 14:03:52,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 894 transitions, 13001 flow. Second operand has 53 states, 53 states have (on average 78.79245283018868) internal successors, (4176), 53 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:52,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:52,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2022-11-21 14:03:52,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand