./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/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_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN --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-6b4ec56 [2022-11-20 10:39:13,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:39:13,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:39:13,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:39:13,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:39:13,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:39:13,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:39:13,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:39:13,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:39:13,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:39:13,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:39:13,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:39:13,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:39:13,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:39:13,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:39:13,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:39:13,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:39:13,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:39:13,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:39:13,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:39:13,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:39:13,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:39:13,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:39:13,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:39:13,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:39:13,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:39:13,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:39:13,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:39:13,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:39:13,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:39:13,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:39:13,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:39:13,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:39:13,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:39:13,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:39:13,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:39:13,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:39:13,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:39:13,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:39:13,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:39:13,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:39:13,170 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:39:13,192 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:39:13,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:39:13,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:39:13,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:39:13,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:39:13,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:39:13,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:39:13,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:39:13,196 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:39:13,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:39:13,196 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:39:13,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:39:13,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:39:13,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:39:13,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:39:13,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:39:13,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:39:13,197 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:39:13,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:39:13,198 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:39:13,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:39:13,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:39:13,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:39:13,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:39:13,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:39:13,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:39:13,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:39:13,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:39:13,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:39:13,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:39:13,200 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:39:13,200 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:39:13,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:39:13,200 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_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2022-11-20 10:39:13,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:39:13,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:39:13,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:39:13,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:39:13,550 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:39:13,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-20 10:39:16,560 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:39:16,790 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:39:16,791 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-20 10:39:16,798 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/data/db8a10aca/717d9df7a71f43d8b5abe0c02f30f3b1/FLAG3f2747365 [2022-11-20 10:39:16,815 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/data/db8a10aca/717d9df7a71f43d8b5abe0c02f30f3b1 [2022-11-20 10:39:16,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:39:16,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:39:16,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:39:16,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:39:16,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:39:16,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:39:16" (1/1) ... [2022-11-20 10:39:16,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63034178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:16, skipping insertion in model container [2022-11-20 10:39:16,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:39:16" (1/1) ... [2022-11-20 10:39:16,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:39:16,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:39:17,078 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_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-20 10:39:17,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:39:17,097 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:39:17,127 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_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-20 10:39:17,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:39:17,153 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:39:17,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17 WrapperNode [2022-11-20 10:39:17,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:39:17,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:39:17,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:39:17,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:39:17,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (1/1) ... [2022-11-20 10:39:17,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (1/1) ... [2022-11-20 10:39:17,234 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2022-11-20 10:39:17,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:39:17,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:39:17,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:39:17,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:39:17,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (1/1) ... [2022-11-20 10:39:17,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (1/1) ... [2022-11-20 10:39:17,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (1/1) ... [2022-11-20 10:39:17,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (1/1) ... [2022-11-20 10:39:17,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (1/1) ... [2022-11-20 10:39:17,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (1/1) ... [2022-11-20 10:39:17,296 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (1/1) ... [2022-11-20 10:39:17,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (1/1) ... [2022-11-20 10:39:17,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:39:17,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:39:17,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:39:17,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:39:17,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (1/1) ... [2022-11-20 10:39:17,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:39:17,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:17,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:39:17,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:39:17,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:39:17,397 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:39:17,397 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:39:17,397 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:39:17,397 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:39:17,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:39:17,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:39:17,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:39:17,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:39:17,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:39:17,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:39:17,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:39:17,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:39:17,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:39:17,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:39:17,402 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:39:17,554 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:39:17,558 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:39:17,874 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:39:17,966 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:39:17,966 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:39:17,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:39:17 BoogieIcfgContainer [2022-11-20 10:39:17,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:39:17,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:39:17,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:39:17,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:39:17,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:39:16" (1/3) ... [2022-11-20 10:39:17,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c16099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:39:17, skipping insertion in model container [2022-11-20 10:39:17,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:17" (2/3) ... [2022-11-20 10:39:17,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c16099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:39:17, skipping insertion in model container [2022-11-20 10:39:17,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:39:17" (3/3) ... [2022-11-20 10:39:17,978 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-11-20 10:39:17,987 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:39:17,996 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:39:17,996 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:39:17,996 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:39:18,063 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:39:18,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 133 transitions, 282 flow [2022-11-20 10:39:18,170 INFO L130 PetriNetUnfolder]: 11/131 cut-off events. [2022-11-20 10:39:18,170 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:39:18,175 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. [2022-11-20 10:39:18,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 133 transitions, 282 flow [2022-11-20 10:39:18,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 122 transitions, 256 flow [2022-11-20 10:39:18,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:39:18,197 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;@34b2f5a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:39:18,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 10:39:18,233 INFO L130 PetriNetUnfolder]: 11/121 cut-off events. [2022-11-20 10:39:18,233 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:39:18,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:18,234 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] [2022-11-20 10:39:18,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:39:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1382683983, now seen corresponding path program 1 times [2022-11-20 10:39:18,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:18,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288750843] [2022-11-20 10:39:18,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:18,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:18,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:18,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288750843] [2022-11-20 10:39:18,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288750843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:18,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:39:18,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:39:18,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440737087] [2022-11-20 10:39:18,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:18,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:39:18,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:39:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:39:18,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 133 [2022-11-20 10:39:18,560 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) [2022-11-20 10:39:18,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:18,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 133 [2022-11-20 10:39:18,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:18,656 INFO L130 PetriNetUnfolder]: 8/122 cut-off events. [2022-11-20 10:39:18,656 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-20 10:39:18,657 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. [2022-11-20 10:39:18,663 INFO L137 encePairwiseOnDemand]: 126/133 looper letters, 7 selfloop transitions, 0 changer transitions 3/115 dead transitions. [2022-11-20 10:39:18,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 256 flow [2022-11-20 10:39:18,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:39:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:39:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 250 transitions. [2022-11-20 10:39:18,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9398496240601504 [2022-11-20 10:39:18,682 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 250 transitions. [2022-11-20 10:39:18,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 250 transitions. [2022-11-20 10:39:18,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:18,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 250 transitions. [2022-11-20 10:39:18,691 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) [2022-11-20 10:39:18,695 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) [2022-11-20 10:39:18,696 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) [2022-11-20 10:39:18,698 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 256 flow. Second operand 2 states and 250 transitions. [2022-11-20 10:39:18,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 256 flow [2022-11-20 10:39:18,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 115 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 10:39:18,715 INFO L231 Difference]: Finished difference. Result has 115 places, 112 transitions, 228 flow [2022-11-20 10:39:18,718 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} [2022-11-20 10:39:18,724 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, -3 predicate places. [2022-11-20 10:39:18,724 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 112 transitions, 228 flow [2022-11-20 10:39:18,725 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) [2022-11-20 10:39:18,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:18,726 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] [2022-11-20 10:39:18,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:39:18,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:39:18,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:18,728 INFO L85 PathProgramCache]: Analyzing trace with hash 882365775, now seen corresponding path program 1 times [2022-11-20 10:39:18,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:18,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254007328] [2022-11-20 10:39:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:18,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:19,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:19,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254007328] [2022-11-20 10:39:19,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254007328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:19,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:39:19,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:39:19,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690534228] [2022-11-20 10:39:19,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:19,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:39:19,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:19,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:39:19,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:39:19,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 133 [2022-11-20 10:39:19,302 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) [2022-11-20 10:39:19,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:19,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 133 [2022-11-20 10:39:19,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:19,434 INFO L130 PetriNetUnfolder]: 13/157 cut-off events. [2022-11-20 10:39:19,434 INFO L131 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-11-20 10:39:19,435 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. [2022-11-20 10:39:19,436 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 23 selfloop transitions, 2 changer transitions 4/121 dead transitions. [2022-11-20 10:39:19,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 307 flow [2022-11-20 10:39:19,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:39:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:39:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2022-11-20 10:39:19,440 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2022-11-20 10:39:19,441 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2022-11-20 10:39:19,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2022-11-20 10:39:19,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:19,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2022-11-20 10:39:19,445 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) [2022-11-20 10:39:19,447 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) [2022-11-20 10:39:19,448 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) [2022-11-20 10:39:19,448 INFO L175 Difference]: Start difference. First operand has 115 places, 112 transitions, 228 flow. Second operand 5 states and 540 transitions. [2022-11-20 10:39:19,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 307 flow [2022-11-20 10:39:19,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:39:19,452 INFO L231 Difference]: Finished difference. Result has 119 places, 113 transitions, 244 flow [2022-11-20 10:39:19,452 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} [2022-11-20 10:39:19,453 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2022-11-20 10:39:19,453 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 244 flow [2022-11-20 10:39:19,454 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) [2022-11-20 10:39:19,454 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:19,454 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] [2022-11-20 10:39:19,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:39:19,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:39:19,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:19,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1024793816, now seen corresponding path program 1 times [2022-11-20 10:39:19,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:19,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193050315] [2022-11-20 10:39:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:19,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:19,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:19,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193050315] [2022-11-20 10:39:19,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193050315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:19,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:39:19,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:39:19,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289430412] [2022-11-20 10:39:19,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:19,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:39:19,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:19,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:39:19,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:39:19,777 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 133 [2022-11-20 10:39:19,777 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) [2022-11-20 10:39:19,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:19,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 133 [2022-11-20 10:39:19,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:19,855 INFO L130 PetriNetUnfolder]: 18/188 cut-off events. [2022-11-20 10:39:19,856 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 10:39:19,857 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. [2022-11-20 10:39:19,857 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 14 selfloop transitions, 5 changer transitions 2/118 dead transitions. [2022-11-20 10:39:19,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 298 flow [2022-11-20 10:39:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:39:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:39:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2022-11-20 10:39:19,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8796992481203008 [2022-11-20 10:39:19,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2022-11-20 10:39:19,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2022-11-20 10:39:19,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:19,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2022-11-20 10:39:19,863 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) [2022-11-20 10:39:19,864 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) [2022-11-20 10:39:19,865 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) [2022-11-20 10:39:19,865 INFO L175 Difference]: Start difference. First operand has 119 places, 113 transitions, 244 flow. Second operand 3 states and 351 transitions. [2022-11-20 10:39:19,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 298 flow [2022-11-20 10:39:19,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 292 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-20 10:39:19,870 INFO L231 Difference]: Finished difference. Result has 117 places, 115 transitions, 263 flow [2022-11-20 10:39:19,870 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} [2022-11-20 10:39:19,871 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2022-11-20 10:39:19,871 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 263 flow [2022-11-20 10:39:19,872 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) [2022-11-20 10:39:19,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:19,872 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] [2022-11-20 10:39:19,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:39:19,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:39:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash -677544406, now seen corresponding path program 1 times [2022-11-20 10:39:19,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:19,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620541374] [2022-11-20 10:39:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:19,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:20,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:20,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620541374] [2022-11-20 10:39:20,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620541374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:20,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:39:20,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 10:39:20,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446623015] [2022-11-20 10:39:20,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:20,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:39:20,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:20,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:39:20,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:39:20,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 133 [2022-11-20 10:39:20,315 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) [2022-11-20 10:39:20,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:20,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 133 [2022-11-20 10:39:20,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:20,740 INFO L130 PetriNetUnfolder]: 55/344 cut-off events. [2022-11-20 10:39:20,741 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2022-11-20 10:39:20,744 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. [2022-11-20 10:39:20,746 INFO L137 encePairwiseOnDemand]: 121/133 looper letters, 33 selfloop transitions, 7 changer transitions 28/150 dead transitions. [2022-11-20 10:39:20,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 150 transitions, 490 flow [2022-11-20 10:39:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:39:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-20 10:39:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1113 transitions. [2022-11-20 10:39:20,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7607655502392344 [2022-11-20 10:39:20,751 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1113 transitions. [2022-11-20 10:39:20,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1113 transitions. [2022-11-20 10:39:20,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:20,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1113 transitions. [2022-11-20 10:39:20,759 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) [2022-11-20 10:39:20,763 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) [2022-11-20 10:39:20,764 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) [2022-11-20 10:39:20,764 INFO L175 Difference]: Start difference. First operand has 117 places, 115 transitions, 263 flow. Second operand 11 states and 1113 transitions. [2022-11-20 10:39:20,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 150 transitions, 490 flow [2022-11-20 10:39:20,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 150 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:39:20,772 INFO L231 Difference]: Finished difference. Result has 131 places, 115 transitions, 286 flow [2022-11-20 10:39:20,773 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} [2022-11-20 10:39:20,774 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 13 predicate places. [2022-11-20 10:39:20,780 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 115 transitions, 286 flow [2022-11-20 10:39:20,781 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) [2022-11-20 10:39:20,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:20,782 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] [2022-11-20 10:39:20,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:39:20,782 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:39:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:20,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1671458293, now seen corresponding path program 1 times [2022-11-20 10:39:20,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:20,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488051461] [2022-11-20 10:39:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:20,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:21,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:21,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488051461] [2022-11-20 10:39:21,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488051461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:21,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427298968] [2022-11-20 10:39:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:21,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:21,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:21,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:21,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:39:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 10:39:21,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:22,807 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 [2022-11-20 10:39:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:22,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:23,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:39:23,114 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 [2022-11-20 10:39:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:24,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427298968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:24,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:24,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23, 17] total 38 [2022-11-20 10:39:24,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852398078] [2022-11-20 10:39:24,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:24,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 10:39:24,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:24,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 10:39:24,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:39:24,502 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2022-11-20 10:39:24,506 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) [2022-11-20 10:39:24,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:24,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2022-11-20 10:39:24,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:26,227 INFO L130 PetriNetUnfolder]: 117/703 cut-off events. [2022-11-20 10:39:26,227 INFO L131 PetriNetUnfolder]: For 238/246 co-relation queries the response was YES. [2022-11-20 10:39:26,229 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. [2022-11-20 10:39:26,232 INFO L137 encePairwiseOnDemand]: 103/133 looper letters, 71 selfloop transitions, 34 changer transitions 37/200 dead transitions. [2022-11-20 10:39:26,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 200 transitions, 832 flow [2022-11-20 10:39:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 10:39:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-20 10:39:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2491 transitions. [2022-11-20 10:39:26,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5508624502432552 [2022-11-20 10:39:26,240 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2491 transitions. [2022-11-20 10:39:26,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2491 transitions. [2022-11-20 10:39:26,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:26,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2491 transitions. [2022-11-20 10:39:26,248 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) [2022-11-20 10:39:26,256 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) [2022-11-20 10:39:26,258 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) [2022-11-20 10:39:26,258 INFO L175 Difference]: Start difference. First operand has 131 places, 115 transitions, 286 flow. Second operand 34 states and 2491 transitions. [2022-11-20 10:39:26,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 200 transitions, 832 flow [2022-11-20 10:39:26,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 200 transitions, 788 flow, removed 14 selfloop flow, removed 8 redundant places. [2022-11-20 10:39:26,265 INFO L231 Difference]: Finished difference. Result has 165 places, 130 transitions, 442 flow [2022-11-20 10:39:26,265 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} [2022-11-20 10:39:26,266 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 47 predicate places. [2022-11-20 10:39:26,266 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 130 transitions, 442 flow [2022-11-20 10:39:26,268 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) [2022-11-20 10:39:26,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:26,268 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] [2022-11-20 10:39:26,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:26,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:26,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:39:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:26,477 INFO L85 PathProgramCache]: Analyzing trace with hash 218243413, now seen corresponding path program 1 times [2022-11-20 10:39:26,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:26,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76916081] [2022-11-20 10:39:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:26,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:39:26,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:26,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76916081] [2022-11-20 10:39:26,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76916081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:26,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:39:26,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:39:26,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337456827] [2022-11-20 10:39:26,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:26,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:39:26,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:26,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:39:26,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:39:26,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2022-11-20 10:39:26,590 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) [2022-11-20 10:39:26,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:26,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2022-11-20 10:39:26,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:26,692 INFO L130 PetriNetUnfolder]: 53/404 cut-off events. [2022-11-20 10:39:26,692 INFO L131 PetriNetUnfolder]: For 172/172 co-relation queries the response was YES. [2022-11-20 10:39:26,693 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. [2022-11-20 10:39:26,695 INFO L137 encePairwiseOnDemand]: 130/133 looper letters, 21 selfloop transitions, 2 changer transitions 6/134 dead transitions. [2022-11-20 10:39:26,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 134 transitions, 502 flow [2022-11-20 10:39:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:39:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:39:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2022-11-20 10:39:26,697 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9022556390977443 [2022-11-20 10:39:26,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2022-11-20 10:39:26,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2022-11-20 10:39:26,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:26,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2022-11-20 10:39:26,698 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) [2022-11-20 10:39:26,699 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) [2022-11-20 10:39:26,699 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) [2022-11-20 10:39:26,700 INFO L175 Difference]: Start difference. First operand has 165 places, 130 transitions, 442 flow. Second operand 3 states and 360 transitions. [2022-11-20 10:39:26,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 134 transitions, 502 flow [2022-11-20 10:39:26,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 134 transitions, 445 flow, removed 11 selfloop flow, removed 20 redundant places. [2022-11-20 10:39:26,737 INFO L231 Difference]: Finished difference. Result has 142 places, 123 transitions, 350 flow [2022-11-20 10:39:26,738 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} [2022-11-20 10:39:26,738 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 24 predicate places. [2022-11-20 10:39:26,738 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 123 transitions, 350 flow [2022-11-20 10:39:26,744 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) [2022-11-20 10:39:26,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:26,744 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] [2022-11-20 10:39:26,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:39:26,745 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:39:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:26,747 INFO L85 PathProgramCache]: Analyzing trace with hash 458806931, now seen corresponding path program 2 times [2022-11-20 10:39:26,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:26,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562894795] [2022-11-20 10:39:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:26,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:39:26,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:26,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562894795] [2022-11-20 10:39:26,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562894795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:26,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118840864] [2022-11-20 10:39:26,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:39:26,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:26,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:26,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:27,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:39:27,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:39:27,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:27,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:39:27,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:39:27,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:39:27,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118840864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:27,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:39:27,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-20 10:39:27,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886975413] [2022-11-20 10:39:27,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:27,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:39:27,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:27,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:39:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:39:27,224 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 133 [2022-11-20 10:39:27,226 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) [2022-11-20 10:39:27,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:27,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 133 [2022-11-20 10:39:27,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:27,336 INFO L130 PetriNetUnfolder]: 54/468 cut-off events. [2022-11-20 10:39:27,337 INFO L131 PetriNetUnfolder]: For 190/194 co-relation queries the response was YES. [2022-11-20 10:39:27,338 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. [2022-11-20 10:39:27,340 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 22 selfloop transitions, 11 changer transitions 0/138 dead transitions. [2022-11-20 10:39:27,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 138 transitions, 487 flow [2022-11-20 10:39:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:39:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:39:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2022-11-20 10:39:27,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8947368421052632 [2022-11-20 10:39:27,342 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2022-11-20 10:39:27,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2022-11-20 10:39:27,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:27,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2022-11-20 10:39:27,344 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) [2022-11-20 10:39:27,345 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) [2022-11-20 10:39:27,346 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) [2022-11-20 10:39:27,346 INFO L175 Difference]: Start difference. First operand has 142 places, 123 transitions, 350 flow. Second operand 4 states and 476 transitions. [2022-11-20 10:39:27,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 138 transitions, 487 flow [2022-11-20 10:39:27,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 138 transitions, 477 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-20 10:39:27,354 INFO L231 Difference]: Finished difference. Result has 137 places, 132 transitions, 454 flow [2022-11-20 10:39:27,355 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} [2022-11-20 10:39:27,356 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 19 predicate places. [2022-11-20 10:39:27,356 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 132 transitions, 454 flow [2022-11-20 10:39:27,356 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) [2022-11-20 10:39:27,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:27,357 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] [2022-11-20 10:39:27,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:27,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:39:27,576 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:39:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:27,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1877919315, now seen corresponding path program 3 times [2022-11-20 10:39:27,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:27,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924379700] [2022-11-20 10:39:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:27,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:39:27,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:27,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924379700] [2022-11-20 10:39:27,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924379700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:27,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:39:27,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:39:27,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460202479] [2022-11-20 10:39:27,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:27,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:39:27,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:27,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:39:27,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:39:27,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2022-11-20 10:39:27,872 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) [2022-11-20 10:39:27,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:27,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2022-11-20 10:39:27,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:28,053 INFO L130 PetriNetUnfolder]: 86/779 cut-off events. [2022-11-20 10:39:28,053 INFO L131 PetriNetUnfolder]: For 521/521 co-relation queries the response was YES. [2022-11-20 10:39:28,056 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. [2022-11-20 10:39:28,060 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 32 selfloop transitions, 4 changer transitions 1/142 dead transitions. [2022-11-20 10:39:28,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 142 transitions, 601 flow [2022-11-20 10:39:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:39:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:39:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2022-11-20 10:39:28,062 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8909774436090225 [2022-11-20 10:39:28,062 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2022-11-20 10:39:28,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2022-11-20 10:39:28,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:28,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2022-11-20 10:39:28,064 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) [2022-11-20 10:39:28,066 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) [2022-11-20 10:39:28,066 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) [2022-11-20 10:39:28,066 INFO L175 Difference]: Start difference. First operand has 137 places, 132 transitions, 454 flow. Second operand 4 states and 474 transitions. [2022-11-20 10:39:28,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 142 transitions, 601 flow [2022-11-20 10:39:28,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 142 transitions, 589 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-20 10:39:28,072 INFO L231 Difference]: Finished difference. Result has 142 places, 132 transitions, 457 flow [2022-11-20 10:39:28,073 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} [2022-11-20 10:39:28,076 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 24 predicate places. [2022-11-20 10:39:28,076 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 132 transitions, 457 flow [2022-11-20 10:39:28,077 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) [2022-11-20 10:39:28,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:28,077 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] [2022-11-20 10:39:28,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:39:28,078 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:39:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1075862869, now seen corresponding path program 1 times [2022-11-20 10:39:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:28,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882589725] [2022-11-20 10:39:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:28,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:39:28,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:28,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882589725] [2022-11-20 10:39:28,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882589725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815239766] [2022-11-20 10:39:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:28,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:28,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:28,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:28,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:39:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:28,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-20 10:39:28,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:30,708 INFO L321 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-11-20 10:39:30,708 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 [2022-11-20 10:39:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:30,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:31,411 INFO L321 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-11-20 10:39:31,412 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 [2022-11-20 10:39:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:34,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815239766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:34,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:34,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 24, 23] total 47 [2022-11-20 10:39:34,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991171189] [2022-11-20 10:39:34,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:34,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 10:39:34,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:34,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 10:39:34,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 10:39:34,337 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 133 [2022-11-20 10:39:34,341 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) [2022-11-20 10:39:34,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:34,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 133 [2022-11-20 10:39:34,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:44,171 INFO L130 PetriNetUnfolder]: 1740/6651 cut-off events. [2022-11-20 10:39:44,171 INFO L131 PetriNetUnfolder]: For 7917/7933 co-relation queries the response was YES. [2022-11-20 10:39:44,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14133 conditions, 6651 events. 1740/6651 cut-off events. For 7917/7933 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 64280 event pairs, 208 based on Foata normal form. 33/6300 useless extension candidates. Maximal degree in co-relation 14113. Up to 639 conditions per place. [2022-11-20 10:39:44,219 INFO L137 encePairwiseOnDemand]: 103/133 looper letters, 287 selfloop transitions, 177 changer transitions 143/671 dead transitions. [2022-11-20 10:39:44,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 671 transitions, 3730 flow [2022-11-20 10:39:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-20 10:39:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-11-20 10:39:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 7420 transitions. [2022-11-20 10:39:44,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5872576177285319 [2022-11-20 10:39:44,234 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 7420 transitions. [2022-11-20 10:39:44,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 7420 transitions. [2022-11-20 10:39:44,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:44,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 7420 transitions. [2022-11-20 10:39:44,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 78.10526315789474) internal successors, (7420), 95 states have internal predecessors, (7420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:44,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 133.0) internal successors, (12768), 96 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:44,281 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 133.0) internal successors, (12768), 96 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:44,281 INFO L175 Difference]: Start difference. First operand has 142 places, 132 transitions, 457 flow. Second operand 95 states and 7420 transitions. [2022-11-20 10:39:44,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 671 transitions, 3730 flow [2022-11-20 10:39:44,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 671 transitions, 3725 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 10:39:44,300 INFO L231 Difference]: Finished difference. Result has 298 places, 308 transitions, 2474 flow [2022-11-20 10:39:44,301 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=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=2474, PETRI_PLACES=298, PETRI_TRANSITIONS=308} [2022-11-20 10:39:44,302 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 180 predicate places. [2022-11-20 10:39:44,302 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 308 transitions, 2474 flow [2022-11-20 10:39:44,303 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) [2022-11-20 10:39:44,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:44,304 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] [2022-11-20 10:39:44,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:44,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:44,510 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:39:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2064305813, now seen corresponding path program 2 times [2022-11-20 10:39:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:44,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479901943] [2022-11-20 10:39:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:44,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:49,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:49,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479901943] [2022-11-20 10:39:49,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479901943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51999967] [2022-11-20 10:39:49,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:39:49,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:49,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:49,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:49,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:39:49,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:39:49,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:49,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-20 10:39:49,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:52,350 INFO L321 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-11-20 10:39:52,351 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 [2022-11-20 10:39:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:52,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:53,434 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-20 10:39:53,435 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 78 [2022-11-20 10:39:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:57,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51999967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:57,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:57,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 24, 23] total 73 [2022-11-20 10:39:57,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374090011] [2022-11-20 10:39:57,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:57,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-20 10:39:57,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:57,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-20 10:39:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=4742, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 10:39:57,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-11-20 10:39:57,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 308 transitions, 2474 flow. Second operand has 73 states, 73 states have (on average 60.49315068493151) internal successors, (4416), 73 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:57,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:57,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-11-20 10:39:57,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:40:08,432 INFO L130 PetriNetUnfolder]: 1888/7196 cut-off events. [2022-11-20 10:40:08,433 INFO L131 PetriNetUnfolder]: For 123369/123639 co-relation queries the response was YES. [2022-11-20 10:40:08,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35171 conditions, 7196 events. 1888/7196 cut-off events. For 123369/123639 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 71037 event pairs, 610 based on Foata normal form. 30/6789 useless extension candidates. Maximal degree in co-relation 35088. Up to 3198 conditions per place. [2022-11-20 10:40:08,546 INFO L137 encePairwiseOnDemand]: 94/133 looper letters, 277 selfloop transitions, 110 changer transitions 62/503 dead transitions. [2022-11-20 10:40:08,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 503 transitions, 6382 flow [2022-11-20 10:40:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-20 10:40:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-20 10:40:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3718 transitions. [2022-11-20 10:40:08,555 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46591478696741856 [2022-11-20 10:40:08,555 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3718 transitions. [2022-11-20 10:40:08,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3718 transitions. [2022-11-20 10:40:08,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:40:08,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3718 transitions. [2022-11-20 10:40:08,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 61.96666666666667) internal successors, (3718), 60 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:08,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 133.0) internal successors, (8113), 61 states have internal predecessors, (8113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:08,578 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 133.0) internal successors, (8113), 61 states have internal predecessors, (8113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:08,578 INFO L175 Difference]: Start difference. First operand has 298 places, 308 transitions, 2474 flow. Second operand 60 states and 3718 transitions. [2022-11-20 10:40:08,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 503 transitions, 6382 flow [2022-11-20 10:40:08,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 503 transitions, 5683 flow, removed 316 selfloop flow, removed 36 redundant places. [2022-11-20 10:40:08,916 INFO L231 Difference]: Finished difference. Result has 330 places, 387 transitions, 3645 flow [2022-11-20 10:40:08,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=3645, PETRI_PLACES=330, PETRI_TRANSITIONS=387} [2022-11-20 10:40:08,917 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 212 predicate places. [2022-11-20 10:40:08,917 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 387 transitions, 3645 flow [2022-11-20 10:40:08,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 60.49315068493151) internal successors, (4416), 73 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:08,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:40:08,920 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] [2022-11-20 10:40:08,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:40:09,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:40:09,127 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:40:09,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1344177291, now seen corresponding path program 3 times [2022-11-20 10:40:09,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:40:09,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103863018] [2022-11-20 10:40:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:09,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:40:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:40:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:40:09,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:40:09,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103863018] [2022-11-20 10:40:09,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103863018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:40:09,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368241397] [2022-11-20 10:40:09,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:40:09,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:09,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:40:09,896 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:40:09,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:40:10,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:40:10,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:10,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-20 10:40:10,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:11,052 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 [2022-11-20 10:40:11,262 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 [2022-11-20 10:40:11,650 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 [2022-11-20 10:40:11,730 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 [2022-11-20 10:40:12,627 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-20 10:40:12,629 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 48 treesize of output 17 [2022-11-20 10:40:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:12,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:27,572 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-11-20 10:40:27,572 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 2 case distinctions, treesize of input 151 treesize of output 108 [2022-11-20 10:40:27,698 INFO L321 Elim1Store]: treesize reduction 12, result has 89.6 percent of original size [2022-11-20 10:40:27,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 288 treesize of output 349 [2022-11-20 10:40:27,764 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-20 10:40:27,765 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 234 treesize of output 236 [2022-11-20 10:40:27,845 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-20 10:40:27,845 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 184 treesize of output 211 [2022-11-20 10:40:30,544 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-11-20 10:40:30,544 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 2 case distinctions, treesize of input 151 treesize of output 108 [2022-11-20 10:40:30,608 INFO L321 Elim1Store]: treesize reduction 82, result has 28.7 percent of original size [2022-11-20 10:40:30,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 288 treesize of output 279 [2022-11-20 10:40:30,668 INFO L321 Elim1Store]: treesize reduction 56, result has 13.8 percent of original size [2022-11-20 10:40:30,668 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 234 treesize of output 192 [2022-11-20 10:40:30,711 INFO L321 Elim1Store]: treesize reduction 56, result has 13.8 percent of original size [2022-11-20 10:40:30,712 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 184 treesize of output 167 [2022-11-20 10:40:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:40,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368241397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:40,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:40:40,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 33, 31] total 65 [2022-11-20 10:40:40,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220498208] [2022-11-20 10:40:40,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:40,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-20 10:40:40,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:40:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-20 10:40:40,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=3564, Unknown=53, NotChecked=0, Total=4160 [2022-11-20 10:40:40,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-11-20 10:40:40,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 387 transitions, 3645 flow. Second operand has 65 states, 65 states have (on average 60.723076923076924) internal successors, (3947), 65 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:40,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:40:40,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-11-20 10:40:40,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:40:51,895 INFO L130 PetriNetUnfolder]: 2756/10043 cut-off events. [2022-11-20 10:40:51,895 INFO L131 PetriNetUnfolder]: For 424334/425106 co-relation queries the response was YES. [2022-11-20 10:40:51,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68319 conditions, 10043 events. 2756/10043 cut-off events. For 424334/425106 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 106140 event pairs, 312 based on Foata normal form. 137/9630 useless extension candidates. Maximal degree in co-relation 68229. Up to 1876 conditions per place. [2022-11-20 10:40:52,028 INFO L137 encePairwiseOnDemand]: 100/133 looper letters, 354 selfloop transitions, 299 changer transitions 131/838 dead transitions. [2022-11-20 10:40:52,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 838 transitions, 14396 flow [2022-11-20 10:40:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-20 10:40:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-11-20 10:40:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4764 transitions. [2022-11-20 10:40:52,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.477593984962406 [2022-11-20 10:40:52,037 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4764 transitions. [2022-11-20 10:40:52,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4764 transitions. [2022-11-20 10:40:52,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:40:52,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4764 transitions. [2022-11-20 10:40:52,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 63.52) internal successors, (4764), 75 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:52,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 133.0) internal successors, (10108), 76 states have internal predecessors, (10108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:52,064 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 133.0) internal successors, (10108), 76 states have internal predecessors, (10108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:52,065 INFO L175 Difference]: Start difference. First operand has 330 places, 387 transitions, 3645 flow. Second operand 75 states and 4764 transitions. [2022-11-20 10:40:52,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 838 transitions, 14396 flow [2022-11-20 10:40:52,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 838 transitions, 13336 flow, removed 493 selfloop flow, removed 31 redundant places. [2022-11-20 10:40:52,722 INFO L231 Difference]: Finished difference. Result has 403 places, 524 transitions, 5826 flow [2022-11-20 10:40:52,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=5826, PETRI_PLACES=403, PETRI_TRANSITIONS=524} [2022-11-20 10:40:52,723 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 285 predicate places. [2022-11-20 10:40:52,723 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 524 transitions, 5826 flow [2022-11-20 10:40:52,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 60.723076923076924) internal successors, (3947), 65 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:52,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:40:52,725 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] [2022-11-20 10:40:52,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:40:52,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:52,932 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:40:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:52,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1614997231, now seen corresponding path program 4 times [2022-11-20 10:40:52,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:40:52,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923537973] [2022-11-20 10:40:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:52,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:40:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:40:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:56,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:40:56,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923537973] [2022-11-20 10:40:56,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923537973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:40:56,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656863075] [2022-11-20 10:40:56,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:40:56,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:56,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:40:56,262 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:40:56,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:40:56,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:40:56,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:56,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 10:40:56,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:58,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:40:58,303 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 [2022-11-20 10:40:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:58,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:59,206 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-20 10:40:59,206 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 77 treesize of output 64 [2022-11-20 10:41:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:01,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656863075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:01,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:41:01,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24, 23] total 70 [2022-11-20 10:41:01,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079031505] [2022-11-20 10:41:01,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:01,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-20 10:41:01,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-20 10:41:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=3929, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 10:41:01,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-11-20 10:41:01,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 524 transitions, 5826 flow. Second operand has 70 states, 70 states have (on average 60.6) internal successors, (4242), 70 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:01,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:01,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-11-20 10:41:01,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:13,326 INFO L130 PetriNetUnfolder]: 2291/8751 cut-off events. [2022-11-20 10:41:13,326 INFO L131 PetriNetUnfolder]: For 543863/544432 co-relation queries the response was YES. [2022-11-20 10:41:13,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68894 conditions, 8751 events. 2291/8751 cut-off events. For 543863/544432 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 91216 event pairs, 296 based on Foata normal form. 255/8515 useless extension candidates. Maximal degree in co-relation 68771. Up to 1561 conditions per place. [2022-11-20 10:41:13,477 INFO L137 encePairwiseOnDemand]: 97/133 looper letters, 254 selfloop transitions, 185 changer transitions 247/740 dead transitions. [2022-11-20 10:41:13,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 740 transitions, 14362 flow [2022-11-20 10:41:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-20 10:41:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-11-20 10:41:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4649 transitions. [2022-11-20 10:41:13,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4723633407843934 [2022-11-20 10:41:13,489 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4649 transitions. [2022-11-20 10:41:13,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4649 transitions. [2022-11-20 10:41:13,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:13,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4649 transitions. [2022-11-20 10:41:13,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 62.82432432432432) internal successors, (4649), 74 states have internal predecessors, (4649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:13,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 133.0) internal successors, (9975), 75 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:13,517 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 133.0) internal successors, (9975), 75 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:13,517 INFO L175 Difference]: Start difference. First operand has 403 places, 524 transitions, 5826 flow. Second operand 74 states and 4649 transitions. [2022-11-20 10:41:13,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 740 transitions, 14362 flow [2022-11-20 10:41:14,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 740 transitions, 12638 flow, removed 816 selfloop flow, removed 61 redundant places. [2022-11-20 10:41:14,401 INFO L231 Difference]: Finished difference. Result has 405 places, 378 transitions, 4233 flow [2022-11-20 10:41:14,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=3729, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=4233, PETRI_PLACES=405, PETRI_TRANSITIONS=378} [2022-11-20 10:41:14,403 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 287 predicate places. [2022-11-20 10:41:14,403 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 378 transitions, 4233 flow [2022-11-20 10:41:14,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 60.6) internal successors, (4242), 70 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:14,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:14,404 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] [2022-11-20 10:41:14,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:14,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:14,615 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:41:14,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:14,616 INFO L85 PathProgramCache]: Analyzing trace with hash -938914552, now seen corresponding path program 5 times [2022-11-20 10:41:14,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:14,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434785206] [2022-11-20 10:41:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:14,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:41:14,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:14,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434785206] [2022-11-20 10:41:14,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434785206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:14,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620534853] [2022-11-20 10:41:14,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:41:14,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:14,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:14,819 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:14,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:41:15,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-20 10:41:15,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:15,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:41:15,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:41:15,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:41:15,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620534853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:15,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:41:15,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 11 [2022-11-20 10:41:15,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886432205] [2022-11-20 10:41:15,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:15,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:41:15,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:41:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:41:15,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 133 [2022-11-20 10:41:15,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 378 transitions, 4233 flow. Second operand has 11 states, 11 states have (on average 112.81818181818181) internal successors, (1241), 11 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:15,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:15,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 133 [2022-11-20 10:41:15,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:18,411 INFO L130 PetriNetUnfolder]: 1457/7408 cut-off events. [2022-11-20 10:41:18,412 INFO L131 PetriNetUnfolder]: For 415158/415742 co-relation queries the response was YES. [2022-11-20 10:41:18,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56449 conditions, 7408 events. 1457/7408 cut-off events. For 415158/415742 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 79930 event pairs, 522 based on Foata normal form. 242/7249 useless extension candidates. Maximal degree in co-relation 56325. Up to 1286 conditions per place. [2022-11-20 10:41:18,535 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 123 selfloop transitions, 131 changer transitions 32/432 dead transitions. [2022-11-20 10:41:18,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 432 transitions, 5797 flow [2022-11-20 10:41:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:41:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:41:18,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 693 transitions. [2022-11-20 10:41:18,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.868421052631579 [2022-11-20 10:41:18,539 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 693 transitions. [2022-11-20 10:41:18,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 693 transitions. [2022-11-20 10:41:18,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:18,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 693 transitions. [2022-11-20 10:41:18,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 115.5) internal successors, (693), 6 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:18,542 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) [2022-11-20 10:41:18,543 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) [2022-11-20 10:41:18,543 INFO L175 Difference]: Start difference. First operand has 405 places, 378 transitions, 4233 flow. Second operand 6 states and 693 transitions. [2022-11-20 10:41:18,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 432 transitions, 5797 flow [2022-11-20 10:41:19,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 432 transitions, 5428 flow, removed 116 selfloop flow, removed 73 redundant places. [2022-11-20 10:41:19,254 INFO L231 Difference]: Finished difference. Result has 303 places, 378 transitions, 4708 flow [2022-11-20 10:41:19,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=3836, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4708, PETRI_PLACES=303, PETRI_TRANSITIONS=378} [2022-11-20 10:41:19,255 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 185 predicate places. [2022-11-20 10:41:19,255 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 378 transitions, 4708 flow [2022-11-20 10:41:19,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 112.81818181818181) internal successors, (1241), 11 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:19,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:19,256 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 10:41:19,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:19,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:19,459 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:41:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:19,459 INFO L85 PathProgramCache]: Analyzing trace with hash -604255316, now seen corresponding path program 6 times [2022-11-20 10:41:19,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:19,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167487872] [2022-11-20 10:41:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:19,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:41:19,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:19,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167487872] [2022-11-20 10:41:19,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167487872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:19,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755950118] [2022-11-20 10:41:19,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:41:19,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:19,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:19,991 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:20,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:41:20,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 10:41:20,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:20,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-20 10:41:20,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:21,499 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 [2022-11-20 10:41:22,049 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 [2022-11-20 10:41:22,169 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 [2022-11-20 10:41:23,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:23,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 14 [2022-11-20 10:41:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:23,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:25,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:25,933 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 [2022-11-20 10:41:25,981 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-20 10:41:25,982 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 275 [2022-11-20 10:41:26,036 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-20 10:41:26,036 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 223 [2022-11-20 10:41:26,089 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-20 10:41:26,090 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 197 [2022-11-20 10:41:27,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:27,422 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 [2022-11-20 10:41:27,453 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-20 10:41:27,453 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 571 treesize of output 511 [2022-11-20 10:41:27,485 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-20 10:41:27,486 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 503 treesize of output 459 [2022-11-20 10:41:27,527 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-20 10:41:27,528 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 451 treesize of output 355 [2022-11-20 10:41:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:29,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755950118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:29,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:41:29,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 32, 29] total 61 [2022-11-20 10:41:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427541485] [2022-11-20 10:41:29,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:29,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-20 10:41:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:29,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-20 10:41:29,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=2876, Unknown=47, NotChecked=0, Total=3660 [2022-11-20 10:41:29,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-11-20 10:41:29,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 378 transitions, 4708 flow. Second operand has 61 states, 61 states have (on average 61.0655737704918) internal successors, (3725), 61 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:29,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:29,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-11-20 10:41:29,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:41,570 INFO L130 PetriNetUnfolder]: 3850/14025 cut-off events. [2022-11-20 10:41:41,571 INFO L131 PetriNetUnfolder]: For 597861/598516 co-relation queries the response was YES. [2022-11-20 10:41:41,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100098 conditions, 14025 events. 3850/14025 cut-off events. For 597861/598516 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 159206 event pairs, 651 based on Foata normal form. 260/13494 useless extension candidates. Maximal degree in co-relation 100003. Up to 2537 conditions per place. [2022-11-20 10:41:41,972 INFO L137 encePairwiseOnDemand]: 98/133 looper letters, 403 selfloop transitions, 340 changer transitions 114/911 dead transitions. [2022-11-20 10:41:41,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 911 transitions, 17068 flow [2022-11-20 10:41:41,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-20 10:41:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-11-20 10:41:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4823 transitions. [2022-11-20 10:41:41,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47714681440443213 [2022-11-20 10:41:41,980 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4823 transitions. [2022-11-20 10:41:41,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4823 transitions. [2022-11-20 10:41:41,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:41,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4823 transitions. [2022-11-20 10:41:41,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 63.46052631578947) internal successors, (4823), 76 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:42,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 133.0) internal successors, (10241), 77 states have internal predecessors, (10241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:42,002 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 133.0) internal successors, (10241), 77 states have internal predecessors, (10241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:42,002 INFO L175 Difference]: Start difference. First operand has 303 places, 378 transitions, 4708 flow. Second operand 76 states and 4823 transitions. [2022-11-20 10:41:42,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 911 transitions, 17068 flow [2022-11-20 10:41:42,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 911 transitions, 14922 flow, removed 1071 selfloop flow, removed 24 redundant places. [2022-11-20 10:41:42,644 INFO L231 Difference]: Finished difference. Result has 370 places, 589 transitions, 9553 flow [2022-11-20 10:41:42,644 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=4512, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=9553, PETRI_PLACES=370, PETRI_TRANSITIONS=589} [2022-11-20 10:41:42,644 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 252 predicate places. [2022-11-20 10:41:42,644 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 589 transitions, 9553 flow [2022-11-20 10:41:42,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 61.0655737704918) internal successors, (3725), 61 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:42,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:42,645 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 10:41:42,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:42,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:41:42,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:41:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:42,846 INFO L85 PathProgramCache]: Analyzing trace with hash 297168662, now seen corresponding path program 7 times [2022-11-20 10:41:42,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:42,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343042145] [2022-11-20 10:41:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:42,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:41:43,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:43,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343042145] [2022-11-20 10:41:43,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343042145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:43,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757150762] [2022-11-20 10:41:43,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:41:43,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:43,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:43,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:43,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:41:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:43,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-20 10:41:43,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:45,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:45,030 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 [2022-11-20 10:41:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:45,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:45,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:45,591 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 77 treesize of output 78 [2022-11-20 10:41:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:47,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757150762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:47,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:41:47,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 23, 22] total 45 [2022-11-20 10:41:47,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401365882] [2022-11-20 10:41:47,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:47,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 10:41:47,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 10:41:47,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1543, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 10:41:47,473 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2022-11-20 10:41:47,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 589 transitions, 9553 flow. Second operand has 45 states, 45 states have (on average 79.08888888888889) internal successors, (3559), 45 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:47,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:47,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2022-11-20 10:41:47,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:56,456 INFO L130 PetriNetUnfolder]: 4090/17908 cut-off events. [2022-11-20 10:41:56,456 INFO L131 PetriNetUnfolder]: For 492510/494761 co-relation queries the response was YES. [2022-11-20 10:41:56,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110562 conditions, 17908 events. 4090/17908 cut-off events. For 492510/494761 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 225713 event pairs, 967 based on Foata normal form. 1090/17966 useless extension candidates. Maximal degree in co-relation 110447. Up to 3262 conditions per place. [2022-11-20 10:41:56,748 INFO L137 encePairwiseOnDemand]: 109/133 looper letters, 480 selfloop transitions, 356 changer transitions 66/996 dead transitions. [2022-11-20 10:41:56,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 996 transitions, 18499 flow [2022-11-20 10:41:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 10:41:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-20 10:41:56,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4119 transitions. [2022-11-20 10:41:56,754 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6072534276868642 [2022-11-20 10:41:56,754 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4119 transitions. [2022-11-20 10:41:56,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4119 transitions. [2022-11-20 10:41:56,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:56,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4119 transitions. [2022-11-20 10:41:56,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 80.76470588235294) internal successors, (4119), 51 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:56,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 133.0) internal successors, (6916), 52 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:56,770 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 133.0) internal successors, (6916), 52 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:56,770 INFO L175 Difference]: Start difference. First operand has 370 places, 589 transitions, 9553 flow. Second operand 51 states and 4119 transitions. [2022-11-20 10:41:56,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 996 transitions, 18499 flow [2022-11-20 10:41:57,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 996 transitions, 17944 flow, removed 251 selfloop flow, removed 28 redundant places. [2022-11-20 10:41:57,941 INFO L231 Difference]: Finished difference. Result has 402 places, 756 transitions, 13534 flow [2022-11-20 10:41:57,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=9128, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=13534, PETRI_PLACES=402, PETRI_TRANSITIONS=756} [2022-11-20 10:41:57,942 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 284 predicate places. [2022-11-20 10:41:57,942 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 756 transitions, 13534 flow [2022-11-20 10:41:57,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 79.08888888888889) internal successors, (3559), 45 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:57,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:57,943 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] [2022-11-20 10:41:57,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:58,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:41:58,149 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:41:58,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1486002077, now seen corresponding path program 8 times [2022-11-20 10:41:58,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:58,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935885681] [2022-11-20 10:41:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:58,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:41:59,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:59,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935885681] [2022-11-20 10:41:59,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935885681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:59,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276735650] [2022-11-20 10:41:59,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:41:59,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:59,115 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:59,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:41:59,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:41:59,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:59,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-20 10:41:59,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:00,532 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 [2022-11-20 10:42:00,993 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 [2022-11-20 10:42:01,090 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 [2022-11-20 10:42:02,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:42:02,268 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 [2022-11-20 10:42:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:02,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:06,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:42:06,007 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 182 treesize of output 122 [2022-11-20 10:42:06,104 INFO L321 Elim1Store]: treesize reduction 42, result has 65.3 percent of original size [2022-11-20 10:42:06,104 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 376 treesize of output 402 [2022-11-20 10:42:06,204 INFO L321 Elim1Store]: treesize reduction 42, result has 65.3 percent of original size [2022-11-20 10:42:06,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 324 treesize of output 322 [2022-11-20 10:42:06,298 INFO L321 Elim1Store]: treesize reduction 42, result has 65.3 percent of original size [2022-11-20 10:42:06,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 215 treesize of output 253 [2022-11-20 10:42:11,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:42:11,968 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 182 treesize of output 122 [2022-11-20 10:42:12,016 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-20 10:42:12,017 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 376 treesize of output 336 [2022-11-20 10:42:12,065 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-20 10:42:12,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 324 treesize of output 256 [2022-11-20 10:42:12,119 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-20 10:42:12,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 215 treesize of output 187 [2022-11-20 10:42:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:14,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276735650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:14,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:14,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 38, 34] total 74 [2022-11-20 10:42:14,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863806818] [2022-11-20 10:42:14,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:14,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-20 10:42:14,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:14,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-20 10:42:14,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=4157, Unknown=56, NotChecked=0, Total=5402 [2022-11-20 10:42:14,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-11-20 10:42:14,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 756 transitions, 13534 flow. Second operand has 74 states, 74 states have (on average 60.770270270270274) internal successors, (4497), 74 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:14,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:42:14,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-11-20 10:42:14,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:42:59,211 INFO L130 PetriNetUnfolder]: 10698/38219 cut-off events. [2022-11-20 10:42:59,211 INFO L131 PetriNetUnfolder]: For 1195324/1196727 co-relation queries the response was YES. [2022-11-20 10:43:00,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252559 conditions, 38219 events. 10698/38219 cut-off events. For 1195324/1196727 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 506990 event pairs, 1188 based on Foata normal form. 696/36717 useless extension candidates. Maximal degree in co-relation 252433. Up to 7011 conditions per place. [2022-11-20 10:43:00,163 INFO L137 encePairwiseOnDemand]: 97/133 looper letters, 655 selfloop transitions, 932 changer transitions 300/1941 dead transitions. [2022-11-20 10:43:00,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1941 transitions, 40962 flow [2022-11-20 10:43:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-11-20 10:43:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2022-11-20 10:43:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 10957 transitions. [2022-11-20 10:43:00,183 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47620496327524015 [2022-11-20 10:43:00,184 INFO L72 ComplementDD]: Start complementDD. Operand 173 states and 10957 transitions. [2022-11-20 10:43:00,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 173 states and 10957 transitions. [2022-11-20 10:43:00,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:43:00,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 173 states and 10957 transitions. [2022-11-20 10:43:00,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 174 states, 173 states have (on average 63.335260115606935) internal successors, (10957), 173 states have internal predecessors, (10957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:00,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 174 states, 174 states have (on average 133.0) internal successors, (23142), 174 states have internal predecessors, (23142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:00,242 INFO L81 ComplementDD]: Finished complementDD. Result has 174 states, 174 states have (on average 133.0) internal successors, (23142), 174 states have internal predecessors, (23142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:00,243 INFO L175 Difference]: Start difference. First operand has 402 places, 756 transitions, 13534 flow. Second operand 173 states and 10957 transitions. [2022-11-20 10:43:00,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1941 transitions, 40962 flow [2022-11-20 10:43:03,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 1941 transitions, 39632 flow, removed 518 selfloop flow, removed 37 redundant places. [2022-11-20 10:43:03,309 INFO L231 Difference]: Finished difference. Result has 632 places, 1174 transitions, 24412 flow [2022-11-20 10:43:03,310 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=12894, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=173, PETRI_FLOW=24412, PETRI_PLACES=632, PETRI_TRANSITIONS=1174} [2022-11-20 10:43:03,310 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 514 predicate places. [2022-11-20 10:43:03,311 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 1174 transitions, 24412 flow [2022-11-20 10:43:03,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 60.770270270270274) internal successors, (4497), 74 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:03,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:43:03,312 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] [2022-11-20 10:43:03,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:03,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:43:03,517 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:43:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2133377927, now seen corresponding path program 9 times [2022-11-20 10:43:03,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:43:03,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769668393] [2022-11-20 10:43:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:43:03,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:43:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:06,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:43:06,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769668393] [2022-11-20 10:43:06,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769668393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:43:06,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083490014] [2022-11-20 10:43:06,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:43:06,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:43:06,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:43:06,437 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:43:06,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dcceee-3b16-4e50-ae5b-b90e61ab8b5d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:43:06,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:43:06,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:43:06,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-20 10:43:06,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:09,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:43:09,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:43:09,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:43:09,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:43:09,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:43:09,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2022-11-20 10:43:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:09,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:11,008 INFO L321 Elim1Store]: treesize reduction 74, result has 52.9 percent of original size [2022-11-20 10:43:11,008 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 114 [2022-11-20 10:43:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:14,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083490014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:14,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:43:14,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 26] total 68 [2022-11-20 10:43:14,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837415390] [2022-11-20 10:43:14,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:14,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 10:43:14,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:43:14,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 10:43:14,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=3938, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 10:43:14,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2022-11-20 10:43:14,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 1174 transitions, 24412 flow. Second operand has 68 states, 68 states have (on average 67.69117647058823) internal successors, (4603), 68 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:14,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:43:14,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2022-11-20 10:43:14,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand