./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.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_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/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_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/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_69a98e2c-a091-4cba-99ae-74c904116393/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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- 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 11:11:50,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:11:50,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:11:50,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:11:50,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:11:50,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:11:50,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:11:50,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:11:50,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:11:50,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:11:50,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:11:50,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:11:50,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:11:50,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:11:50,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:11:50,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:11:50,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:11:50,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:11:50,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:11:50,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:11:50,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:11:50,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:11:50,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:11:50,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:11:50,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:11:50,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:11:50,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:11:50,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:11:50,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:11:50,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:11:50,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:11:50,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:11:50,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:11:50,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:11:50,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:11:50,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:11:50,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:11:50,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:11:50,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:11:50,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:11:50,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:11:50,979 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:11:51,020 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:11:51,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:11:51,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:11:51,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:11:51,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:11:51,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:11:51,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:11:51,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:11:51,025 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:11:51,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:11:51,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:11:51,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:11:51,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:11:51,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:11:51,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:11:51,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:11:51,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:11:51,029 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:11:51,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:11:51,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:11:51,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:11:51,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:11:51,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:11:51,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:11:51,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:11:51,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:11:51,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:11:51,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:11:51,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:11:51,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:11:51,033 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:11:51,034 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:11:51,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:11:51,035 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_69a98e2c-a091-4cba-99ae-74c904116393/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-11-20 11:11:51,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:11:51,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:11:51,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:11:51,481 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:11:51,482 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:11:51,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-20 11:11:55,263 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:11:55,590 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:11:55,591 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-20 11:11:55,602 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/data/12234acd7/87ccc04862e04f54808ca0cddca710e9/FLAG7f2452118 [2022-11-20 11:11:55,626 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/data/12234acd7/87ccc04862e04f54808ca0cddca710e9 [2022-11-20 11:11:55,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:11:55,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:11:55,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:11:55,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:11:55,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:11:55,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:11:55" (1/1) ... [2022-11-20 11:11:55,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a737deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:55, skipping insertion in model container [2022-11-20 11:11:55,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:11:55" (1/1) ... [2022-11-20 11:11:55,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:11:55,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:11:55,930 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_69a98e2c-a091-4cba-99ae-74c904116393/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-20 11:11:55,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:11:55,957 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:11:55,986 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_69a98e2c-a091-4cba-99ae-74c904116393/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-20 11:11:55,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:11:56,013 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:11:56,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56 WrapperNode [2022-11-20 11:11:56,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:11:56,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:11:56,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:11:56,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:11:56,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (1/1) ... [2022-11-20 11:11:56,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (1/1) ... [2022-11-20 11:11:56,093 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2022-11-20 11:11:56,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:11:56,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:11:56,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:11:56,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:11:56,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (1/1) ... [2022-11-20 11:11:56,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (1/1) ... [2022-11-20 11:11:56,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (1/1) ... [2022-11-20 11:11:56,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (1/1) ... [2022-11-20 11:11:56,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (1/1) ... [2022-11-20 11:11:56,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (1/1) ... [2022-11-20 11:11:56,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (1/1) ... [2022-11-20 11:11:56,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (1/1) ... [2022-11-20 11:11:56,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:11:56,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:11:56,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:11:56,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:11:56,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (1/1) ... [2022-11-20 11:11:56,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:11:56,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:56,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:11:56,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:11:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:11:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:11:56,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:11:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:11:56,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:11:56,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:11:56,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:11:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:11:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:11:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:11:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:11:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:11:56,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:11:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:11:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:11:56,299 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 11:11:56,470 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:11:56,473 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:11:57,010 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:11:57,290 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:11:57,290 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 11:11:57,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:11:57 BoogieIcfgContainer [2022-11-20 11:11:57,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:11:57,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:11:57,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:11:57,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:11:57,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:11:55" (1/3) ... [2022-11-20 11:11:57,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429e4ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:11:57, skipping insertion in model container [2022-11-20 11:11:57,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:56" (2/3) ... [2022-11-20 11:11:57,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429e4ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:11:57, skipping insertion in model container [2022-11-20 11:11:57,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:11:57" (3/3) ... [2022-11-20 11:11:57,314 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-11-20 11:11:57,348 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:11:57,363 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:11:57,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:11:57,364 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:11:57,491 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:11:57,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 165 transitions, 346 flow [2022-11-20 11:11:57,659 INFO L130 PetriNetUnfolder]: 13/163 cut-off events. [2022-11-20 11:11:57,659 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:11:57,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 82 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-20 11:11:57,665 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 165 transitions, 346 flow [2022-11-20 11:11:57,672 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 154 transitions, 320 flow [2022-11-20 11:11:57,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:11:57,694 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;@7c7a5c6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:11:57,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 11:11:57,752 INFO L130 PetriNetUnfolder]: 13/153 cut-off events. [2022-11-20 11:11:57,752 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:11:57,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:11:57,754 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:57,754 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 11:11:57,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1165910738, now seen corresponding path program 1 times [2022-11-20 11:11:57,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:57,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659541322] [2022-11-20 11:11:57,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:57,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:58,132 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 11:11:58,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:58,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659541322] [2022-11-20 11:11:58,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659541322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:11:58,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:11:58,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:11:58,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841682947] [2022-11-20 11:11:58,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:58,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:11:58,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:58,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:11:58,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:11:58,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 165 [2022-11-20 11:11:58,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 154 transitions, 320 flow. Second operand has 2 states, 2 states have (on average 153.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 11:11:58,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:11:58,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 165 [2022-11-20 11:11:58,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:11:58,277 INFO L130 PetriNetUnfolder]: 13/178 cut-off events. [2022-11-20 11:11:58,278 INFO L131 PetriNetUnfolder]: For 22/23 co-relation queries the response was YES. [2022-11-20 11:11:58,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 178 events. 13/178 cut-off events. For 22/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 186 event pairs, 3 based on Foata normal form. 16/181 useless extension candidates. Maximal degree in co-relation 123. Up to 19 conditions per place. [2022-11-20 11:11:58,281 INFO L137 encePairwiseOnDemand]: 156/165 looper letters, 6 selfloop transitions, 0 changer transitions 5/145 dead transitions. [2022-11-20 11:11:58,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 145 transitions, 314 flow [2022-11-20 11:11:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:11:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:11:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 313 transitions. [2022-11-20 11:11:58,307 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9484848484848485 [2022-11-20 11:11:58,308 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 313 transitions. [2022-11-20 11:11:58,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 313 transitions. [2022-11-20 11:11:58,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:11:58,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 313 transitions. [2022-11-20 11:11:58,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 11:11:58,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 11:11:58,336 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 11:11:58,338 INFO L175 Difference]: Start difference. First operand has 148 places, 154 transitions, 320 flow. Second operand 2 states and 313 transitions. [2022-11-20 11:11:58,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 145 transitions, 314 flow [2022-11-20 11:11:58,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 145 transitions, 306 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:11:58,357 INFO L231 Difference]: Finished difference. Result has 145 places, 140 transitions, 284 flow [2022-11-20 11:11:58,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=284, PETRI_PLACES=145, PETRI_TRANSITIONS=140} [2022-11-20 11:11:58,366 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, -3 predicate places. [2022-11-20 11:11:58,366 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 140 transitions, 284 flow [2022-11-20 11:11:58,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 153.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 11:11:58,367 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:11:58,368 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:58,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:11:58,369 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 11:11:58,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:58,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1994540390, now seen corresponding path program 1 times [2022-11-20 11:11:58,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:58,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302856365] [2022-11-20 11:11:58,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:59,082 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 11:11:59,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:59,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302856365] [2022-11-20 11:11:59,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302856365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:11:59,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:11:59,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:11:59,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132991143] [2022-11-20 11:11:59,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:59,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:11:59,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:59,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:11:59,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:11:59,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 165 [2022-11-20 11:11:59,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 140 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 11:11:59,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:11:59,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 165 [2022-11-20 11:11:59,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:11:59,306 INFO L130 PetriNetUnfolder]: 14/189 cut-off events. [2022-11-20 11:11:59,306 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 11:11:59,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 189 events. 14/189 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 240 event pairs, 0 based on Foata normal form. 1/182 useless extension candidates. Maximal degree in co-relation 238. Up to 23 conditions per place. [2022-11-20 11:11:59,308 INFO L137 encePairwiseOnDemand]: 159/165 looper letters, 28 selfloop transitions, 3 changer transitions 4/148 dead transitions. [2022-11-20 11:11:59,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 148 transitions, 373 flow [2022-11-20 11:11:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:11:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:11:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 651 transitions. [2022-11-20 11:11:59,312 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7890909090909091 [2022-11-20 11:11:59,313 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 651 transitions. [2022-11-20 11:11:59,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 651 transitions. [2022-11-20 11:11:59,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:11:59,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 651 transitions. [2022-11-20 11:11:59,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 11:11:59,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states 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 11:11:59,321 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states 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 11:11:59,321 INFO L175 Difference]: Start difference. First operand has 145 places, 140 transitions, 284 flow. Second operand 5 states and 651 transitions. [2022-11-20 11:11:59,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 148 transitions, 373 flow [2022-11-20 11:11:59,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 148 transitions, 373 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:11:59,327 INFO L231 Difference]: Finished difference. Result has 147 places, 142 transitions, 307 flow [2022-11-20 11:11:59,327 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=147, PETRI_TRANSITIONS=142} [2022-11-20 11:11:59,328 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, -1 predicate places. [2022-11-20 11:11:59,329 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 142 transitions, 307 flow [2022-11-20 11:11:59,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 11:11:59,330 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:11:59,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:59,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:11:59,331 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 11:11:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash 353416500, now seen corresponding path program 1 times [2022-11-20 11:11:59,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:59,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090071482] [2022-11-20 11:11:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:59,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:59,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:59,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090071482] [2022-11-20 11:11:59,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090071482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:59,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863165092] [2022-11-20 11:11:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:59,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:59,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:59,634 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:59,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:11:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:59,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:11:59,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:00,449 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 11:12:00,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:00,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863165092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:00,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:12:00,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-11-20 11:12:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090725609] [2022-11-20 11:12:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:00,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:12:00,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:12:00,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:12:00,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2022-11-20 11:12:00,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 142 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 11:12:00,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:00,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2022-11-20 11:12:00,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:00,736 INFO L130 PetriNetUnfolder]: 15/265 cut-off events. [2022-11-20 11:12:00,737 INFO L131 PetriNetUnfolder]: For 28/31 co-relation queries the response was YES. [2022-11-20 11:12:00,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 265 events. 15/265 cut-off events. For 28/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 506 event pairs, 2 based on Foata normal form. 4/253 useless extension candidates. Maximal degree in co-relation 363. Up to 37 conditions per place. [2022-11-20 11:12:00,739 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 31 selfloop transitions, 9 changer transitions 17/163 dead transitions. [2022-11-20 11:12:00,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 163 transitions, 467 flow [2022-11-20 11:12:00,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:12:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 11:12:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1267 transitions. [2022-11-20 11:12:00,744 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7678787878787878 [2022-11-20 11:12:00,744 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1267 transitions. [2022-11-20 11:12:00,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1267 transitions. [2022-11-20 11:12:00,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:00,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1267 transitions. [2022-11-20 11:12:00,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.7) internal successors, (1267), 10 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states 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 11:12:00,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states 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 11:12:00,755 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states 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 11:12:00,755 INFO L175 Difference]: Start difference. First operand has 147 places, 142 transitions, 307 flow. Second operand 10 states and 1267 transitions. [2022-11-20 11:12:00,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 163 transitions, 467 flow [2022-11-20 11:12:00,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 163 transitions, 460 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-20 11:12:00,761 INFO L231 Difference]: Finished difference. Result has 153 places, 143 transitions, 332 flow [2022-11-20 11:12:00,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=332, PETRI_PLACES=153, PETRI_TRANSITIONS=143} [2022-11-20 11:12:00,763 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 5 predicate places. [2022-11-20 11:12:00,763 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 143 transitions, 332 flow [2022-11-20 11:12:00,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 11:12:00,764 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:00,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:00,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:00,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 11:12:00,972 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 11:12:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:00,973 INFO L85 PathProgramCache]: Analyzing trace with hash -201493965, now seen corresponding path program 1 times [2022-11-20 11:12:00,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:00,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693081876] [2022-11-20 11:12:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:00,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:01,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:01,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693081876] [2022-11-20 11:12:01,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693081876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:01,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911137010] [2022-11-20 11:12:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:01,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:01,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:01,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:01,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:12:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:01,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:12:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:01,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:01,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911137010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:01,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:01,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-20 11:12:01,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498470436] [2022-11-20 11:12:01,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:01,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:12:01,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:12:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:12:01,645 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-20 11:12:01,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 143 transitions, 332 flow. Second operand has 9 states, 9 states have (on average 139.55555555555554) internal successors, (1256), 9 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 11:12:01,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:01,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-20 11:12:01,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:02,073 INFO L130 PetriNetUnfolder]: 145/476 cut-off events. [2022-11-20 11:12:02,074 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-20 11:12:02,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 476 events. 145/476 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1922 event pairs, 1 based on Foata normal form. 0/432 useless extension candidates. Maximal degree in co-relation 864. Up to 56 conditions per place. [2022-11-20 11:12:02,079 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 68 selfloop transitions, 26 changer transitions 0/217 dead transitions. [2022-11-20 11:12:02,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 217 transitions, 721 flow [2022-11-20 11:12:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:12:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-20 11:12:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2008 transitions. [2022-11-20 11:12:02,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8692640692640693 [2022-11-20 11:12:02,086 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2008 transitions. [2022-11-20 11:12:02,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2008 transitions. [2022-11-20 11:12:02,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:02,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2008 transitions. [2022-11-20 11:12:02,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.42857142857142) internal successors, (2008), 14 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 11:12:02,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states 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 11:12:02,100 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states 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 11:12:02,101 INFO L175 Difference]: Start difference. First operand has 153 places, 143 transitions, 332 flow. Second operand 14 states and 2008 transitions. [2022-11-20 11:12:02,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 217 transitions, 721 flow [2022-11-20 11:12:02,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 217 transitions, 705 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 11:12:02,108 INFO L231 Difference]: Finished difference. Result has 165 places, 171 transitions, 482 flow [2022-11-20 11:12:02,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=482, PETRI_PLACES=165, PETRI_TRANSITIONS=171} [2022-11-20 11:12:02,110 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 17 predicate places. [2022-11-20 11:12:02,110 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 171 transitions, 482 flow [2022-11-20 11:12:02,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.55555555555554) internal successors, (1256), 9 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 11:12:02,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:02,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:02,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 11:12:02,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:02,331 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 11:12:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1225427711, now seen corresponding path program 1 times [2022-11-20 11:12:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141616165] [2022-11-20 11:12:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:02,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:02,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:02,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141616165] [2022-11-20 11:12:02,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141616165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:02,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923244279] [2022-11-20 11:12:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:02,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:02,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:02,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:02,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:12:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:02,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:12:02,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:03,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:03,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923244279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:03,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:12:03,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-11-20 11:12:03,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159549498] [2022-11-20 11:12:03,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:03,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:12:03,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:03,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:12:03,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:12:03,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2022-11-20 11:12:03,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 171 transitions, 482 flow. Second operand has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states 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 11:12:03,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:03,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2022-11-20 11:12:03,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:03,361 INFO L130 PetriNetUnfolder]: 65/414 cut-off events. [2022-11-20 11:12:03,361 INFO L131 PetriNetUnfolder]: For 182/197 co-relation queries the response was YES. [2022-11-20 11:12:03,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 765 conditions, 414 events. 65/414 cut-off events. For 182/197 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1524 event pairs, 7 based on Foata normal form. 12/413 useless extension candidates. Maximal degree in co-relation 751. Up to 68 conditions per place. [2022-11-20 11:12:03,366 INFO L137 encePairwiseOnDemand]: 155/165 looper letters, 34 selfloop transitions, 7 changer transitions 5/180 dead transitions. [2022-11-20 11:12:03,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 180 transitions, 596 flow [2022-11-20 11:12:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:12:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:12:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1013 transitions. [2022-11-20 11:12:03,370 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7674242424242425 [2022-11-20 11:12:03,370 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1013 transitions. [2022-11-20 11:12:03,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1013 transitions. [2022-11-20 11:12:03,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:03,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1013 transitions. [2022-11-20 11:12:03,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.625) internal successors, (1013), 8 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states 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 11:12:03,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states 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 11:12:03,379 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states 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 11:12:03,379 INFO L175 Difference]: Start difference. First operand has 165 places, 171 transitions, 482 flow. Second operand 8 states and 1013 transitions. [2022-11-20 11:12:03,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 180 transitions, 596 flow [2022-11-20 11:12:03,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 180 transitions, 596 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:12:03,392 INFO L231 Difference]: Finished difference. Result has 174 places, 172 transitions, 508 flow [2022-11-20 11:12:03,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=508, PETRI_PLACES=174, PETRI_TRANSITIONS=172} [2022-11-20 11:12:03,395 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 26 predicate places. [2022-11-20 11:12:03,396 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 172 transitions, 508 flow [2022-11-20 11:12:03,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states 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 11:12:03,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:03,397 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, 1, 1, 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 11:12:03,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:03,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:03,604 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 11:12:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:03,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1694617530, now seen corresponding path program 1 times [2022-11-20 11:12:03,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:03,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859851230] [2022-11-20 11:12:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:03,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:03,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:03,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859851230] [2022-11-20 11:12:03,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859851230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:03,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18421797] [2022-11-20 11:12:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:03,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:03,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:03,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:03,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:12:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:03,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:12:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:04,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:04,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18421797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:04,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:04,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-20 11:12:04,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298051819] [2022-11-20 11:12:04,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:04,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:12:04,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:04,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:12:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:12:04,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-20 11:12:04,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 172 transitions, 508 flow. Second operand has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 11:12:04,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:04,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-20 11:12:04,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:04,573 INFO L130 PetriNetUnfolder]: 225/688 cut-off events. [2022-11-20 11:12:04,573 INFO L131 PetriNetUnfolder]: For 610/610 co-relation queries the response was YES. [2022-11-20 11:12:04,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 688 events. 225/688 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3188 event pairs, 10 based on Foata normal form. 8/690 useless extension candidates. Maximal degree in co-relation 1730. Up to 87 conditions per place. [2022-11-20 11:12:04,583 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 85 selfloop transitions, 63 changer transitions 0/272 dead transitions. [2022-11-20 11:12:04,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 272 transitions, 1288 flow [2022-11-20 11:12:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:12:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-20 11:12:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2005 transitions. [2022-11-20 11:12:04,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8679653679653679 [2022-11-20 11:12:04,590 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2005 transitions. [2022-11-20 11:12:04,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2005 transitions. [2022-11-20 11:12:04,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:04,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2005 transitions. [2022-11-20 11:12:04,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.21428571428572) internal successors, (2005), 14 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states 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 11:12:04,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states 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 11:12:04,607 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states 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 11:12:04,607 INFO L175 Difference]: Start difference. First operand has 174 places, 172 transitions, 508 flow. Second operand 14 states and 2005 transitions. [2022-11-20 11:12:04,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 272 transitions, 1288 flow [2022-11-20 11:12:04,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 272 transitions, 1262 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-11-20 11:12:04,621 INFO L231 Difference]: Finished difference. Result has 189 places, 220 transitions, 1039 flow [2022-11-20 11:12:04,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1039, PETRI_PLACES=189, PETRI_TRANSITIONS=220} [2022-11-20 11:12:04,624 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 41 predicate places. [2022-11-20 11:12:04,625 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 220 transitions, 1039 flow [2022-11-20 11:12:04,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 11:12:04,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:04,626 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, 1, 1, 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 11:12:04,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:04,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:04,834 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 11:12:04,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash -787524414, now seen corresponding path program 2 times [2022-11-20 11:12:04,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:04,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307961464] [2022-11-20 11:12:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:04,988 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 11:12:04,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:04,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307961464] [2022-11-20 11:12:04,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307961464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:04,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:04,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:12:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433631912] [2022-11-20 11:12:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:04,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:12:04,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:04,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:12:04,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:12:04,993 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-20 11:12:04,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 220 transitions, 1039 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:04,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:04,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-20 11:12:04,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:05,295 INFO L130 PetriNetUnfolder]: 225/705 cut-off events. [2022-11-20 11:12:05,296 INFO L131 PetriNetUnfolder]: For 1481/1498 co-relation queries the response was YES. [2022-11-20 11:12:05,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 705 events. 225/705 cut-off events. For 1481/1498 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3417 event pairs, 69 based on Foata normal form. 3/700 useless extension candidates. Maximal degree in co-relation 2120. Up to 231 conditions per place. [2022-11-20 11:12:05,309 INFO L137 encePairwiseOnDemand]: 158/165 looper letters, 95 selfloop transitions, 21 changer transitions 6/246 dead transitions. [2022-11-20 11:12:05,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 246 transitions, 1450 flow [2022-11-20 11:12:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:12:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:12:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 865 transitions. [2022-11-20 11:12:05,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8737373737373737 [2022-11-20 11:12:05,313 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 865 transitions. [2022-11-20 11:12:05,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 865 transitions. [2022-11-20 11:12:05,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:05,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 865 transitions. [2022-11-20 11:12:05,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.16666666666666) internal successors, (865), 6 states have internal predecessors, (865), 0 states have call successors, (0), 0 states 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 11:12:05,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:05,320 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:05,321 INFO L175 Difference]: Start difference. First operand has 189 places, 220 transitions, 1039 flow. Second operand 6 states and 865 transitions. [2022-11-20 11:12:05,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 246 transitions, 1450 flow [2022-11-20 11:12:05,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 246 transitions, 1380 flow, removed 35 selfloop flow, removed 0 redundant places. [2022-11-20 11:12:05,342 INFO L231 Difference]: Finished difference. Result has 196 places, 220 transitions, 1043 flow [2022-11-20 11:12:05,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1043, PETRI_PLACES=196, PETRI_TRANSITIONS=220} [2022-11-20 11:12:05,344 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 48 predicate places. [2022-11-20 11:12:05,344 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 220 transitions, 1043 flow [2022-11-20 11:12:05,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:05,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:05,345 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, 1, 1, 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 11:12:05,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:12:05,346 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 11:12:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:05,346 INFO L85 PathProgramCache]: Analyzing trace with hash 674420228, now seen corresponding path program 3 times [2022-11-20 11:12:05,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:05,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5343321] [2022-11-20 11:12:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:05,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:05,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:05,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5343321] [2022-11-20 11:12:05,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5343321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:05,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342894382] [2022-11-20 11:12:05,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:12:05,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:05,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:05,535 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:05,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:12:05,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:12:05,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:05,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:12:05,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:05,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:05,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342894382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:05,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:05,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-20 11:12:05,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917883719] [2022-11-20 11:12:05,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:05,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:12:05,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:05,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:12:05,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:12:05,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-20 11:12:05,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 220 transitions, 1043 flow. Second operand has 11 states, 11 states have (on average 139.72727272727272) internal successors, (1537), 11 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states 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 11:12:05,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:05,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-20 11:12:05,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:06,317 INFO L130 PetriNetUnfolder]: 257/823 cut-off events. [2022-11-20 11:12:06,318 INFO L131 PetriNetUnfolder]: For 1745/1757 co-relation queries the response was YES. [2022-11-20 11:12:06,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2510 conditions, 823 events. 257/823 cut-off events. For 1745/1757 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4461 event pairs, 60 based on Foata normal form. 14/829 useless extension candidates. Maximal degree in co-relation 2482. Up to 146 conditions per place. [2022-11-20 11:12:06,329 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 99 selfloop transitions, 56 changer transitions 1/280 dead transitions. [2022-11-20 11:12:06,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 280 transitions, 1716 flow [2022-11-20 11:12:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:12:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:12:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1309 transitions. [2022-11-20 11:12:06,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8814814814814815 [2022-11-20 11:12:06,334 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1309 transitions. [2022-11-20 11:12:06,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1309 transitions. [2022-11-20 11:12:06,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:06,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1309 transitions. [2022-11-20 11:12:06,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.44444444444446) internal successors, (1309), 9 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states 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 11:12:06,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states 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 11:12:06,343 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states 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 11:12:06,344 INFO L175 Difference]: Start difference. First operand has 196 places, 220 transitions, 1043 flow. Second operand 9 states and 1309 transitions. [2022-11-20 11:12:06,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 280 transitions, 1716 flow [2022-11-20 11:12:06,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 280 transitions, 1686 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-20 11:12:06,366 INFO L231 Difference]: Finished difference. Result has 205 places, 239 transitions, 1386 flow [2022-11-20 11:12:06,366 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1386, PETRI_PLACES=205, PETRI_TRANSITIONS=239} [2022-11-20 11:12:06,367 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 57 predicate places. [2022-11-20 11:12:06,368 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 239 transitions, 1386 flow [2022-11-20 11:12:06,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.72727272727272) internal successors, (1537), 11 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states 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 11:12:06,369 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:06,369 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, 1, 1, 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 11:12:06,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:06,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:06,576 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 11:12:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:06,578 INFO L85 PathProgramCache]: Analyzing trace with hash -753816634, now seen corresponding path program 4 times [2022-11-20 11:12:06,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:06,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719568063] [2022-11-20 11:12:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:06,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:06,770 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 11:12:06,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:06,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719568063] [2022-11-20 11:12:06,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719568063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:06,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:06,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:12:06,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595637801] [2022-11-20 11:12:06,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:06,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:12:06,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:12:06,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:12:06,775 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-20 11:12:06,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 239 transitions, 1386 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:06,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:06,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-20 11:12:06,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:07,137 INFO L130 PetriNetUnfolder]: 254/840 cut-off events. [2022-11-20 11:12:07,137 INFO L131 PetriNetUnfolder]: For 2488/2492 co-relation queries the response was YES. [2022-11-20 11:12:07,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2730 conditions, 840 events. 254/840 cut-off events. For 2488/2492 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4619 event pairs, 64 based on Foata normal form. 3/832 useless extension candidates. Maximal degree in co-relation 2698. Up to 278 conditions per place. [2022-11-20 11:12:07,146 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 119 selfloop transitions, 31 changer transitions 7/281 dead transitions. [2022-11-20 11:12:07,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 281 transitions, 1999 flow [2022-11-20 11:12:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:12:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:12:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 882 transitions. [2022-11-20 11:12:07,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8909090909090909 [2022-11-20 11:12:07,150 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 882 transitions. [2022-11-20 11:12:07,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 882 transitions. [2022-11-20 11:12:07,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:07,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 882 transitions. [2022-11-20 11:12:07,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 11:12:07,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:07,157 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:07,157 INFO L175 Difference]: Start difference. First operand has 205 places, 239 transitions, 1386 flow. Second operand 6 states and 882 transitions. [2022-11-20 11:12:07,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 281 transitions, 1999 flow [2022-11-20 11:12:07,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 281 transitions, 1862 flow, removed 23 selfloop flow, removed 5 redundant places. [2022-11-20 11:12:07,181 INFO L231 Difference]: Finished difference. Result has 209 places, 242 transitions, 1418 flow [2022-11-20 11:12:07,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1418, PETRI_PLACES=209, PETRI_TRANSITIONS=242} [2022-11-20 11:12:07,183 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 61 predicate places. [2022-11-20 11:12:07,183 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 242 transitions, 1418 flow [2022-11-20 11:12:07,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:07,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:07,184 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, 1, 1, 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 11:12:07,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:12:07,185 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 11:12:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:07,185 INFO L85 PathProgramCache]: Analyzing trace with hash 343024828, now seen corresponding path program 1 times [2022-11-20 11:12:07,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:07,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009496678] [2022-11-20 11:12:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:07,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:07,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:07,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009496678] [2022-11-20 11:12:07,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009496678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:07,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9106899] [2022-11-20 11:12:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:07,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:07,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:07,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:07,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:12:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:12:07,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:07,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:07,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9106899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:07,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:07,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-20 11:12:07,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775876566] [2022-11-20 11:12:07,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:07,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:12:07,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:07,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:12:07,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:12:07,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-20 11:12:07,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 242 transitions, 1418 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states 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 11:12:07,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:07,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-20 11:12:07,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:08,329 INFO L130 PetriNetUnfolder]: 310/1065 cut-off events. [2022-11-20 11:12:08,330 INFO L131 PetriNetUnfolder]: For 2730/2746 co-relation queries the response was YES. [2022-11-20 11:12:08,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3251 conditions, 1065 events. 310/1065 cut-off events. For 2730/2746 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6677 event pairs, 40 based on Foata normal form. 8/1061 useless extension candidates. Maximal degree in co-relation 3219. Up to 138 conditions per place. [2022-11-20 11:12:08,342 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 112 selfloop transitions, 81 changer transitions 1/318 dead transitions. [2022-11-20 11:12:08,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 318 transitions, 2220 flow [2022-11-20 11:12:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:12:08,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 11:12:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1877 transitions. [2022-11-20 11:12:08,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.875058275058275 [2022-11-20 11:12:08,348 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1877 transitions. [2022-11-20 11:12:08,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1877 transitions. [2022-11-20 11:12:08,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:08,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1877 transitions. [2022-11-20 11:12:08,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 144.3846153846154) internal successors, (1877), 13 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states 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 11:12:08,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states 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 11:12:08,362 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states 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 11:12:08,362 INFO L175 Difference]: Start difference. First operand has 209 places, 242 transitions, 1418 flow. Second operand 13 states and 1877 transitions. [2022-11-20 11:12:08,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 318 transitions, 2220 flow [2022-11-20 11:12:08,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 318 transitions, 2173 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-20 11:12:08,391 INFO L231 Difference]: Finished difference. Result has 224 places, 262 transitions, 1805 flow [2022-11-20 11:12:08,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1805, PETRI_PLACES=224, PETRI_TRANSITIONS=262} [2022-11-20 11:12:08,394 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 76 predicate places. [2022-11-20 11:12:08,394 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 262 transitions, 1805 flow [2022-11-20 11:12:08,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states 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 11:12:08,395 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:08,396 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:08,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:08,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:08,603 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 11:12:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:08,604 INFO L85 PathProgramCache]: Analyzing trace with hash -646540378, now seen corresponding path program 2 times [2022-11-20 11:12:08,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:08,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593955200] [2022-11-20 11:12:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:08,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:08,782 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 11:12:08,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:08,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593955200] [2022-11-20 11:12:08,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593955200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:08,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:08,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:12:08,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325120979] [2022-11-20 11:12:08,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:08,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:12:08,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:08,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:12:08,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:12:08,787 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-20 11:12:08,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 262 transitions, 1805 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:08,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:08,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-20 11:12:08,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:09,182 INFO L130 PetriNetUnfolder]: 299/978 cut-off events. [2022-11-20 11:12:09,182 INFO L131 PetriNetUnfolder]: For 3609/3625 co-relation queries the response was YES. [2022-11-20 11:12:09,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3282 conditions, 978 events. 299/978 cut-off events. For 3609/3625 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5773 event pairs, 92 based on Foata normal form. 6/973 useless extension candidates. Maximal degree in co-relation 3247. Up to 371 conditions per place. [2022-11-20 11:12:09,193 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 128 selfloop transitions, 31 changer transitions 7/290 dead transitions. [2022-11-20 11:12:09,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 290 transitions, 2311 flow [2022-11-20 11:12:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:12:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:12:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2022-11-20 11:12:09,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8848484848484849 [2022-11-20 11:12:09,197 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2022-11-20 11:12:09,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2022-11-20 11:12:09,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:09,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2022-11-20 11:12:09,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states 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 11:12:09,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:09,225 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:09,225 INFO L175 Difference]: Start difference. First operand has 224 places, 262 transitions, 1805 flow. Second operand 6 states and 876 transitions. [2022-11-20 11:12:09,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 290 transitions, 2311 flow [2022-11-20 11:12:09,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 290 transitions, 2274 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-20 11:12:09,260 INFO L231 Difference]: Finished difference. Result has 227 places, 262 transitions, 1845 flow [2022-11-20 11:12:09,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1845, PETRI_PLACES=227, PETRI_TRANSITIONS=262} [2022-11-20 11:12:09,262 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 79 predicate places. [2022-11-20 11:12:09,262 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 262 transitions, 1845 flow [2022-11-20 11:12:09,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:09,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:09,263 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, 1, 1, 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 11:12:09,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:12:09,265 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 11:12:09,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:09,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2027393474, now seen corresponding path program 5 times [2022-11-20 11:12:09,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:09,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564923475] [2022-11-20 11:12:09,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:09,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:09,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:09,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564923475] [2022-11-20 11:12:09,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564923475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:09,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505785124] [2022-11-20 11:12:09,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:12:09,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:09,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:09,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:09,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:12:09,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:12:09,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:12:09,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:09,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:09,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505785124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:09,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:09,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-20 11:12:09,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018050365] [2022-11-20 11:12:09,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:09,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:12:09,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:09,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:12:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:12:09,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-20 11:12:09,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 262 transitions, 1845 flow. Second operand has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states 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 11:12:09,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:09,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-20 11:12:09,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:10,408 INFO L130 PetriNetUnfolder]: 305/962 cut-off events. [2022-11-20 11:12:10,408 INFO L131 PetriNetUnfolder]: For 3921/3921 co-relation queries the response was YES. [2022-11-20 11:12:10,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3329 conditions, 962 events. 305/962 cut-off events. For 3921/3921 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5428 event pairs, 64 based on Foata normal form. 11/962 useless extension candidates. Maximal degree in co-relation 3294. Up to 141 conditions per place. [2022-11-20 11:12:10,420 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 102 selfloop transitions, 86 changer transitions 1/313 dead transitions. [2022-11-20 11:12:10,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 313 transitions, 2502 flow [2022-11-20 11:12:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:12:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 11:12:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1867 transitions. [2022-11-20 11:12:10,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8703962703962704 [2022-11-20 11:12:10,426 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1867 transitions. [2022-11-20 11:12:10,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1867 transitions. [2022-11-20 11:12:10,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:10,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1867 transitions. [2022-11-20 11:12:10,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 143.6153846153846) internal successors, (1867), 13 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states 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 11:12:10,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states 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 11:12:10,441 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states 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 11:12:10,441 INFO L175 Difference]: Start difference. First operand has 227 places, 262 transitions, 1845 flow. Second operand 13 states and 1867 transitions. [2022-11-20 11:12:10,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 313 transitions, 2502 flow [2022-11-20 11:12:10,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 313 transitions, 2425 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-20 11:12:10,477 INFO L231 Difference]: Finished difference. Result has 232 places, 268 transitions, 2015 flow [2022-11-20 11:12:10,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2015, PETRI_PLACES=232, PETRI_TRANSITIONS=268} [2022-11-20 11:12:10,478 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 84 predicate places. [2022-11-20 11:12:10,478 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 268 transitions, 2015 flow [2022-11-20 11:12:10,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states 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 11:12:10,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:10,479 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, 1, 1, 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 11:12:10,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:10,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:12:10,680 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 11:12:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:10,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1064421096, now seen corresponding path program 3 times [2022-11-20 11:12:10,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:10,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057757319] [2022-11-20 11:12:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:10,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:10,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:10,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057757319] [2022-11-20 11:12:10,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057757319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:10,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568727066] [2022-11-20 11:12:10,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:12:10,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:10,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:10,883 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:10,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:12:11,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:12:11,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:12:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:11,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:12:11,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568727066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:11,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:11,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-20 11:12:11,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679804612] [2022-11-20 11:12:11,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:11,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:12:11,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:11,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:12:11,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:12:11,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-20 11:12:11,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 268 transitions, 2015 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states 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 11:12:11,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:11,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-20 11:12:11,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:11,746 INFO L130 PetriNetUnfolder]: 301/935 cut-off events. [2022-11-20 11:12:11,747 INFO L131 PetriNetUnfolder]: For 4091/4091 co-relation queries the response was YES. [2022-11-20 11:12:11,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 935 events. 301/935 cut-off events. For 4091/4091 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5182 event pairs, 51 based on Foata normal form. 6/931 useless extension candidates. Maximal degree in co-relation 3342. Up to 198 conditions per place. [2022-11-20 11:12:11,758 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 108 selfloop transitions, 65 changer transitions 1/298 dead transitions. [2022-11-20 11:12:11,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 298 transitions, 2489 flow [2022-11-20 11:12:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:12:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:12:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1299 transitions. [2022-11-20 11:12:11,764 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8747474747474747 [2022-11-20 11:12:11,764 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1299 transitions. [2022-11-20 11:12:11,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1299 transitions. [2022-11-20 11:12:11,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:11,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1299 transitions. [2022-11-20 11:12:11,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 144.33333333333334) internal successors, (1299), 9 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states 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 11:12:11,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states 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 11:12:11,773 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states 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 11:12:11,773 INFO L175 Difference]: Start difference. First operand has 232 places, 268 transitions, 2015 flow. Second operand 9 states and 1299 transitions. [2022-11-20 11:12:11,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 298 transitions, 2489 flow [2022-11-20 11:12:11,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 298 transitions, 2407 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-11-20 11:12:11,805 INFO L231 Difference]: Finished difference. Result has 232 places, 268 transitions, 2081 flow [2022-11-20 11:12:11,806 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2081, PETRI_PLACES=232, PETRI_TRANSITIONS=268} [2022-11-20 11:12:11,807 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 84 predicate places. [2022-11-20 11:12:11,808 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 268 transitions, 2081 flow [2022-11-20 11:12:11,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states 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 11:12:11,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:11,809 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, 1, 1, 1, 1, 1, 1, 1, 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 11:12:11,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:12,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 11:12:12,017 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 11:12:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1878094116, now seen corresponding path program 1 times [2022-11-20 11:12:12,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:12,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710736801] [2022-11-20 11:12:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:13,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:13,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710736801] [2022-11-20 11:12:13,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710736801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:13,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527082824] [2022-11-20 11:12:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:13,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:13,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:13,448 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:13,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:12:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:12:13,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:14,017 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 34 treesize of output 10 [2022-11-20 11:12:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:14,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:14,128 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 36 treesize of output 12 [2022-11-20 11:12:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:14,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527082824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:14,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:14,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 29 [2022-11-20 11:12:14,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470694645] [2022-11-20 11:12:14,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:14,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:12:14,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:12:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:12:14,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 165 [2022-11-20 11:12:14,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 268 transitions, 2081 flow. Second operand has 29 states, 29 states have (on average 80.51724137931035) internal successors, (2335), 29 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states 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 11:12:14,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:14,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 165 [2022-11-20 11:12:14,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:19,632 INFO L130 PetriNetUnfolder]: 1315/4688 cut-off events. [2022-11-20 11:12:19,633 INFO L131 PetriNetUnfolder]: For 19543/19799 co-relation queries the response was YES. [2022-11-20 11:12:19,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16637 conditions, 4688 events. 1315/4688 cut-off events. For 19543/19799 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 46020 event pairs, 99 based on Foata normal form. 72/4650 useless extension candidates. Maximal degree in co-relation 16605. Up to 775 conditions per place. [2022-11-20 11:12:19,687 INFO L137 encePairwiseOnDemand]: 132/165 looper letters, 134 selfloop transitions, 59 changer transitions 50/432 dead transitions. [2022-11-20 11:12:19,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 432 transitions, 3000 flow [2022-11-20 11:12:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 11:12:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-20 11:12:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4970 transitions. [2022-11-20 11:12:19,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4781144781144781 [2022-11-20 11:12:19,698 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4970 transitions. [2022-11-20 11:12:19,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4970 transitions. [2022-11-20 11:12:19,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:19,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4970 transitions. [2022-11-20 11:12:19,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 78.88888888888889) internal successors, (4970), 63 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states 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 11:12:19,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 165.0) internal successors, (10560), 64 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states 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 11:12:19,852 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 165.0) internal successors, (10560), 64 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states 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 11:12:19,852 INFO L175 Difference]: Start difference. First operand has 232 places, 268 transitions, 2081 flow. Second operand 63 states and 4970 transitions. [2022-11-20 11:12:19,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 432 transitions, 3000 flow [2022-11-20 11:12:19,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 432 transitions, 2810 flow, removed 13 selfloop flow, removed 12 redundant places. [2022-11-20 11:12:19,969 INFO L231 Difference]: Finished difference. Result has 315 places, 312 transitions, 2284 flow [2022-11-20 11:12:19,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1891, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=2284, PETRI_PLACES=315, PETRI_TRANSITIONS=312} [2022-11-20 11:12:19,971 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 167 predicate places. [2022-11-20 11:12:19,971 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 312 transitions, 2284 flow [2022-11-20 11:12:19,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 80.51724137931035) internal successors, (2335), 29 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states 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 11:12:19,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:19,973 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:19,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:20,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:12:20,183 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 11:12:20,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:20,184 INFO L85 PathProgramCache]: Analyzing trace with hash -159129583, now seen corresponding path program 2 times [2022-11-20 11:12:20,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:20,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552392555] [2022-11-20 11:12:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:12:21,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552392555] [2022-11-20 11:12:21,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552392555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180877402] [2022-11-20 11:12:21,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:12:21,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:21,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:21,772 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:21,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:12:21,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:12:21,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:21,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 11:12:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:22,971 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 11:12:23,533 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 11:12:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:23,845 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 11:12:23,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2022-11-20 11:12:23,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 [2022-11-20 11:12:23,973 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 23 treesize of output 7 [2022-11-20 11:12:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:12:24,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:24,838 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (~f~0.offset Int) (~f~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_383))) (let ((.cse2 (select (select .cse0 ~f~0.base) (+ (* c_~counter~0 4) ~f~0.offset)))) (let ((.cse1 (+ (* .cse2 4) |c_ULTIMATE.start_main_#t~ret19#1.offset|))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_main_#t~ret19#1.base|) .cse1) c_~counter~0)) (not (<= 0 .cse2)) (not (< .cse2 c_~n_inv~0)) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_#t~ret19#1.base|) .cse1) 0)))))) is different from false [2022-11-20 11:12:24,895 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (~f~0.offset Int) (~f~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_383))) (let ((.cse2 (select (select .cse0 ~f~0.base) (+ (* c_~counter~0 4) ~f~0.offset)))) (let ((.cse1 (+ (* .cse2 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) .cse1) 0) (not (<= 0 .cse2)) (not (= c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) .cse1))) (not (< .cse2 c_~n_inv~0))))))) is different from false [2022-11-20 11:12:25,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:25,518 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 157 treesize of output 97 [2022-11-20 11:12:25,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:25,561 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 368 treesize of output 326 [2022-11-20 11:12:25,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:25,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 302 treesize of output 276 [2022-11-20 11:12:25,641 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:25,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 116 treesize of output 106 [2022-11-20 11:12:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:12:29,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180877402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:29,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:29,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 52 [2022-11-20 11:12:29,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742256197] [2022-11-20 11:12:29,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:29,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 11:12:29,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 11:12:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2177, Unknown=30, NotChecked=194, Total=2652 [2022-11-20 11:12:29,289 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 165 [2022-11-20 11:12:29,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 312 transitions, 2284 flow. Second operand has 52 states, 52 states have (on average 73.78846153846153) internal successors, (3837), 52 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states 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 11:12:29,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:29,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 165 [2022-11-20 11:12:29,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:34,603 INFO L130 PetriNetUnfolder]: 1066/3949 cut-off events. [2022-11-20 11:12:34,604 INFO L131 PetriNetUnfolder]: For 16960/17325 co-relation queries the response was YES. [2022-11-20 11:12:34,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14737 conditions, 3949 events. 1066/3949 cut-off events. For 16960/17325 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 39132 event pairs, 213 based on Foata normal form. 58/3903 useless extension candidates. Maximal degree in co-relation 14680. Up to 960 conditions per place. [2022-11-20 11:12:34,672 INFO L137 encePairwiseOnDemand]: 133/165 looper letters, 99 selfloop transitions, 59 changer transitions 14/360 dead transitions. [2022-11-20 11:12:34,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 360 transitions, 2890 flow [2022-11-20 11:12:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 11:12:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-20 11:12:34,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2932 transitions. [2022-11-20 11:12:34,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4442424242424242 [2022-11-20 11:12:34,683 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2932 transitions. [2022-11-20 11:12:34,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2932 transitions. [2022-11-20 11:12:34,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:34,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2932 transitions. [2022-11-20 11:12:34,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 73.3) internal successors, (2932), 40 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states 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 11:12:34,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 165.0) internal successors, (6765), 41 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states 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 11:12:34,707 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 165.0) internal successors, (6765), 41 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states 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 11:12:34,707 INFO L175 Difference]: Start difference. First operand has 315 places, 312 transitions, 2284 flow. Second operand 40 states and 2932 transitions. [2022-11-20 11:12:34,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 360 transitions, 2890 flow [2022-11-20 11:12:34,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 360 transitions, 2750 flow, removed 56 selfloop flow, removed 23 redundant places. [2022-11-20 11:12:34,816 INFO L231 Difference]: Finished difference. Result has 327 places, 330 transitions, 2483 flow [2022-11-20 11:12:34,817 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2483, PETRI_PLACES=327, PETRI_TRANSITIONS=330} [2022-11-20 11:12:34,819 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 179 predicate places. [2022-11-20 11:12:34,819 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 330 transitions, 2483 flow [2022-11-20 11:12:34,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 73.78846153846153) internal successors, (3837), 52 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states 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 11:12:34,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:34,821 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:34,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:35,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:12:35,029 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 11:12:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:35,029 INFO L85 PathProgramCache]: Analyzing trace with hash 562814159, now seen corresponding path program 3 times [2022-11-20 11:12:35,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:35,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095282406] [2022-11-20 11:12:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:35,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:12:35,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:35,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095282406] [2022-11-20 11:12:35,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095282406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:35,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735525974] [2022-11-20 11:12:35,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:12:35,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:35,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:35,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:35,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:12:36,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:12:36,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:36,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:12:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:36,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:36,334 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2022-11-20 11:12:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:12:36,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:36,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735525974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:36,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:12:36,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 13 [2022-11-20 11:12:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897480505] [2022-11-20 11:12:36,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:36,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:12:36,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:12:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:12:36,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 165 [2022-11-20 11:12:36,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 330 transitions, 2483 flow. Second operand has 6 states, 6 states have (on average 119.16666666666667) internal successors, (715), 6 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 11:12:36,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:36,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 165 [2022-11-20 11:12:36,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:38,207 INFO L130 PetriNetUnfolder]: 1549/5570 cut-off events. [2022-11-20 11:12:38,207 INFO L131 PetriNetUnfolder]: For 27177/27637 co-relation queries the response was YES. [2022-11-20 11:12:38,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21420 conditions, 5570 events. 1549/5570 cut-off events. For 27177/27637 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 58789 event pairs, 137 based on Foata normal form. 127/5594 useless extension candidates. Maximal degree in co-relation 21366. Up to 1249 conditions per place. [2022-11-20 11:12:38,268 INFO L137 encePairwiseOnDemand]: 155/165 looper letters, 65 selfloop transitions, 24 changer transitions 4/352 dead transitions. [2022-11-20 11:12:38,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 352 transitions, 2804 flow [2022-11-20 11:12:38,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:12:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:12:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 733 transitions. [2022-11-20 11:12:38,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7404040404040404 [2022-11-20 11:12:38,271 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 733 transitions. [2022-11-20 11:12:38,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 733 transitions. [2022-11-20 11:12:38,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:38,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 733 transitions. [2022-11-20 11:12:38,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 122.16666666666667) internal successors, (733), 6 states have internal predecessors, (733), 0 states have call successors, (0), 0 states 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 11:12:38,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:38,281 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:38,281 INFO L175 Difference]: Start difference. First operand has 327 places, 330 transitions, 2483 flow. Second operand 6 states and 733 transitions. [2022-11-20 11:12:38,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 352 transitions, 2804 flow [2022-11-20 11:12:38,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 352 transitions, 2690 flow, removed 21 selfloop flow, removed 29 redundant places. [2022-11-20 11:12:38,444 INFO L231 Difference]: Finished difference. Result has 302 places, 344 transitions, 2584 flow [2022-11-20 11:12:38,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2584, PETRI_PLACES=302, PETRI_TRANSITIONS=344} [2022-11-20 11:12:38,445 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 154 predicate places. [2022-11-20 11:12:38,446 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 344 transitions, 2584 flow [2022-11-20 11:12:38,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.16666666666667) internal successors, (715), 6 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 11:12:38,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:38,447 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:38,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:38,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:38,654 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 11:12:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1476959867, now seen corresponding path program 4 times [2022-11-20 11:12:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:38,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212896803] [2022-11-20 11:12:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:38,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:12:39,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:39,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212896803] [2022-11-20 11:12:39,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212896803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:39,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047417946] [2022-11-20 11:12:39,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:12:39,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:39,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:39,274 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:39,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:12:39,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:12:39,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:39,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:12:39,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:39,652 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 34 treesize of output 10 [2022-11-20 11:12:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:12:39,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:39,753 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 36 treesize of output 12 [2022-11-20 11:12:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:12:40,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047417946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:40,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:40,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2022-11-20 11:12:40,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561116864] [2022-11-20 11:12:40,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:40,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:12:40,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:12:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:12:40,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 165 [2022-11-20 11:12:40,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 344 transitions, 2584 flow. Second operand has 20 states, 20 states have (on average 95.4) internal successors, (1908), 20 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states 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 11:12:40,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:40,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 165 [2022-11-20 11:12:40,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:42,941 INFO L130 PetriNetUnfolder]: 1939/7179 cut-off events. [2022-11-20 11:12:42,942 INFO L131 PetriNetUnfolder]: For 42884/44183 co-relation queries the response was YES. [2022-11-20 11:12:42,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29423 conditions, 7179 events. 1939/7179 cut-off events. For 42884/44183 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 79361 event pairs, 165 based on Foata normal form. 275/7325 useless extension candidates. Maximal degree in co-relation 29371. Up to 959 conditions per place. [2022-11-20 11:12:43,008 INFO L137 encePairwiseOnDemand]: 147/165 looper letters, 120 selfloop transitions, 60 changer transitions 9/400 dead transitions. [2022-11-20 11:12:43,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 400 transitions, 3376 flow [2022-11-20 11:12:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:12:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-20 11:12:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1935 transitions. [2022-11-20 11:12:43,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2022-11-20 11:12:43,015 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1935 transitions. [2022-11-20 11:12:43,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1935 transitions. [2022-11-20 11:12:43,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:43,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1935 transitions. [2022-11-20 11:12:43,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 96.75) internal successors, (1935), 20 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states 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 11:12:43,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states 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 11:12:43,028 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states 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 11:12:43,028 INFO L175 Difference]: Start difference. First operand has 302 places, 344 transitions, 2584 flow. Second operand 20 states and 1935 transitions. [2022-11-20 11:12:43,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 400 transitions, 3376 flow [2022-11-20 11:12:43,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 400 transitions, 3310 flow, removed 33 selfloop flow, removed 2 redundant places. [2022-11-20 11:12:43,391 INFO L231 Difference]: Finished difference. Result has 325 places, 360 transitions, 2954 flow [2022-11-20 11:12:43,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2954, PETRI_PLACES=325, PETRI_TRANSITIONS=360} [2022-11-20 11:12:43,392 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 177 predicate places. [2022-11-20 11:12:43,393 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 360 transitions, 2954 flow [2022-11-20 11:12:43,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.4) internal successors, (1908), 20 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states 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 11:12:43,394 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:43,394 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:43,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:43,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:43,602 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:12:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:43,603 INFO L85 PathProgramCache]: Analyzing trace with hash 224441823, now seen corresponding path program 5 times [2022-11-20 11:12:43,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:43,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674836574] [2022-11-20 11:12:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:43,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:12:43,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:43,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674836574] [2022-11-20 11:12:43,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674836574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:43,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297610015] [2022-11-20 11:12:43,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:12:43,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:43,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:43,941 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:43,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:12:44,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:12:44,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:44,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:12:44,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:12:44,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:12:44,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297610015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:44,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:44,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-20 11:12:44,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485765157] [2022-11-20 11:12:44,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:44,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:12:44,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:12:44,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:12:44,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-20 11:12:44,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 360 transitions, 2954 flow. Second operand has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states 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 11:12:44,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:44,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-20 11:12:44,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:53,270 INFO L130 PetriNetUnfolder]: 8809/22897 cut-off events. [2022-11-20 11:12:53,271 INFO L131 PetriNetUnfolder]: For 130157/131125 co-relation queries the response was YES. [2022-11-20 11:12:53,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98877 conditions, 22897 events. 8809/22897 cut-off events. For 130157/131125 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 252915 event pairs, 1519 based on Foata normal form. 192/22800 useless extension candidates. Maximal degree in co-relation 98818. Up to 5043 conditions per place. [2022-11-20 11:12:53,587 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 687 selfloop transitions, 186 changer transitions 26/1058 dead transitions. [2022-11-20 11:12:53,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1058 transitions, 12703 flow [2022-11-20 11:12:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 11:12:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-20 11:12:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6878 transitions. [2022-11-20 11:12:53,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8507111935683365 [2022-11-20 11:12:53,601 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6878 transitions. [2022-11-20 11:12:53,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6878 transitions. [2022-11-20 11:12:53,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:53,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6878 transitions. [2022-11-20 11:12:53,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 140.3673469387755) internal successors, (6878), 49 states have internal predecessors, (6878), 0 states have call successors, (0), 0 states 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 11:12:53,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 165.0) internal successors, (8250), 50 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states 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 11:12:53,637 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 165.0) internal successors, (8250), 50 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states 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 11:12:53,637 INFO L175 Difference]: Start difference. First operand has 325 places, 360 transitions, 2954 flow. Second operand 49 states and 6878 transitions. [2022-11-20 11:12:53,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1058 transitions, 12703 flow [2022-11-20 11:12:54,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1058 transitions, 11732 flow, removed 466 selfloop flow, removed 13 redundant places. [2022-11-20 11:12:54,936 INFO L231 Difference]: Finished difference. Result has 363 places, 526 transitions, 4591 flow [2022-11-20 11:12:54,936 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=4591, PETRI_PLACES=363, PETRI_TRANSITIONS=526} [2022-11-20 11:12:54,937 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 215 predicate places. [2022-11-20 11:12:54,937 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 526 transitions, 4591 flow [2022-11-20 11:12:54,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states 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 11:12:54,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:54,938 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:54,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 11:12:55,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:12:55,145 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:12:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1195708279, now seen corresponding path program 6 times [2022-11-20 11:12:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:55,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5000598] [2022-11-20 11:12:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:55,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:12:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5000598] [2022-11-20 11:12:55,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5000598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:55,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832866152] [2022-11-20 11:12:55,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:12:55,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:55,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:55,488 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:55,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:12:55,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 11:12:55,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:12:55,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:12:55,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:12:56,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832866152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:56,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:56,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-20 11:12:56,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963665449] [2022-11-20 11:12:56,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:56,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 11:12:56,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:56,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 11:12:56,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:12:56,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-20 11:12:56,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 526 transitions, 4591 flow. Second operand has 21 states, 21 states have (on average 137.47619047619048) internal successors, (2887), 21 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states 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 11:12:56,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:56,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-20 11:12:56,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:13:04,318 INFO L130 PetriNetUnfolder]: 8216/21984 cut-off events. [2022-11-20 11:13:04,319 INFO L131 PetriNetUnfolder]: For 111193/112194 co-relation queries the response was YES. [2022-11-20 11:13:04,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100594 conditions, 21984 events. 8216/21984 cut-off events. For 111193/112194 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 245513 event pairs, 2166 based on Foata normal form. 147/21775 useless extension candidates. Maximal degree in co-relation 100532. Up to 10330 conditions per place. [2022-11-20 11:13:04,768 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 411 selfloop transitions, 126 changer transitions 11/707 dead transitions. [2022-11-20 11:13:04,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 707 transitions, 7673 flow [2022-11-20 11:13:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:13:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 11:13:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3343 transitions. [2022-11-20 11:13:04,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8441919191919192 [2022-11-20 11:13:04,779 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3343 transitions. [2022-11-20 11:13:04,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3343 transitions. [2022-11-20 11:13:04,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:13:04,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3343 transitions. [2022-11-20 11:13:04,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 139.29166666666666) internal successors, (3343), 24 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states 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 11:13:04,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states 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 11:13:04,800 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states 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 11:13:04,800 INFO L175 Difference]: Start difference. First operand has 363 places, 526 transitions, 4591 flow. Second operand 24 states and 3343 transitions. [2022-11-20 11:13:04,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 707 transitions, 7673 flow [2022-11-20 11:13:06,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 707 transitions, 7509 flow, removed 54 selfloop flow, removed 4 redundant places. [2022-11-20 11:13:06,779 INFO L231 Difference]: Finished difference. Result has 392 places, 547 transitions, 5023 flow [2022-11-20 11:13:06,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5023, PETRI_PLACES=392, PETRI_TRANSITIONS=547} [2022-11-20 11:13:06,781 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 244 predicate places. [2022-11-20 11:13:06,781 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 547 transitions, 5023 flow [2022-11-20 11:13:06,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.47619047619048) internal successors, (2887), 21 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states 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 11:13:06,782 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:13:06,782 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:06,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:06,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:06,986 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:13:06,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:06,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1306644927, now seen corresponding path program 7 times [2022-11-20 11:13:06,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:06,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882031587] [2022-11-20 11:13:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:06,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:13:07,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:07,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882031587] [2022-11-20 11:13:07,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882031587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:07,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666410904] [2022-11-20 11:13:07,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:13:07,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:07,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:07,326 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:13:07,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:13:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:07,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:13:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:13:07,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:13:07,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666410904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:07,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:13:07,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-20 11:13:07,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978276071] [2022-11-20 11:13:07,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:07,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 11:13:07,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:07,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 11:13:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:13:07,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-20 11:13:07,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 547 transitions, 5023 flow. Second operand has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states 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 11:13:07,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:13:07,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-20 11:13:07,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:13:20,551 INFO L130 PetriNetUnfolder]: 11507/30583 cut-off events. [2022-11-20 11:13:20,551 INFO L131 PetriNetUnfolder]: For 158247/159498 co-relation queries the response was YES. [2022-11-20 11:13:20,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140846 conditions, 30583 events. 11507/30583 cut-off events. For 158247/159498 co-relation queries the response was YES. Maximal size of possible extension queue 1210. Compared 356042 event pairs, 1928 based on Foata normal form. 246/30426 useless extension candidates. Maximal degree in co-relation 140777. Up to 8422 conditions per place. [2022-11-20 11:13:20,952 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 847 selfloop transitions, 255 changer transitions 23/1284 dead transitions. [2022-11-20 11:13:20,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1284 transitions, 15110 flow [2022-11-20 11:13:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-20 11:13:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-20 11:13:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 8962 transitions. [2022-11-20 11:13:20,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8486742424242424 [2022-11-20 11:13:20,971 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 8962 transitions. [2022-11-20 11:13:20,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 8962 transitions. [2022-11-20 11:13:20,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:13:20,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 8962 transitions. [2022-11-20 11:13:20,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 140.03125) internal successors, (8962), 64 states have internal predecessors, (8962), 0 states have call successors, (0), 0 states 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 11:13:21,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 165.0) internal successors, (10725), 65 states have internal predecessors, (10725), 0 states have call successors, (0), 0 states 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 11:13:21,018 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 165.0) internal successors, (10725), 65 states have internal predecessors, (10725), 0 states have call successors, (0), 0 states 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 11:13:21,019 INFO L175 Difference]: Start difference. First operand has 392 places, 547 transitions, 5023 flow. Second operand 64 states and 8962 transitions. [2022-11-20 11:13:21,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1284 transitions, 15110 flow [2022-11-20 11:13:24,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1284 transitions, 14920 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-11-20 11:13:24,178 INFO L231 Difference]: Finished difference. Result has 474 places, 645 transitions, 6684 flow [2022-11-20 11:13:24,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4929, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=6684, PETRI_PLACES=474, PETRI_TRANSITIONS=645} [2022-11-20 11:13:24,179 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 326 predicate places. [2022-11-20 11:13:24,179 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 645 transitions, 6684 flow [2022-11-20 11:13:24,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states 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 11:13:24,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:13:24,180 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:24,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:24,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:24,381 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:13:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:24,382 INFO L85 PathProgramCache]: Analyzing trace with hash 115705783, now seen corresponding path program 8 times [2022-11-20 11:13:24,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:24,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487116089] [2022-11-20 11:13:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:24,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:13:24,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:24,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487116089] [2022-11-20 11:13:24,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487116089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:24,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396497279] [2022-11-20 11:13:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:13:24,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:24,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:24,644 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:13:24,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:13:24,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:13:24,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:13:24,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:13:24,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:13:25,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:13:25,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396497279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:25,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:13:25,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-20 11:13:25,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230880748] [2022-11-20 11:13:25,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:25,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:13:25,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:13:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:13:25,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-20 11:13:25,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 645 transitions, 6684 flow. Second operand has 19 states, 19 states have (on average 137.8421052631579) internal successors, (2619), 19 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states 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 11:13:25,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:13:25,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-20 11:13:25,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:13:39,758 INFO L130 PetriNetUnfolder]: 11339/31232 cut-off events. [2022-11-20 11:13:39,758 INFO L131 PetriNetUnfolder]: For 202596/203803 co-relation queries the response was YES. [2022-11-20 11:13:40,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158979 conditions, 31232 events. 11339/31232 cut-off events. For 202596/203803 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 369322 event pairs, 1411 based on Foata normal form. 550/31371 useless extension candidates. Maximal degree in co-relation 158887. Up to 4313 conditions per place. [2022-11-20 11:13:40,280 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 697 selfloop transitions, 333 changer transitions 4/1193 dead transitions. [2022-11-20 11:13:40,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1193 transitions, 14915 flow [2022-11-20 11:13:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 11:13:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-20 11:13:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 7020 transitions. [2022-11-20 11:13:40,294 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.850909090909091 [2022-11-20 11:13:40,295 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 7020 transitions. [2022-11-20 11:13:40,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 7020 transitions. [2022-11-20 11:13:40,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:13:40,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 7020 transitions. [2022-11-20 11:13:40,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 140.4) internal successors, (7020), 50 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states 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 11:13:40,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states 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 11:13:40,331 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states 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 11:13:40,331 INFO L175 Difference]: Start difference. First operand has 474 places, 645 transitions, 6684 flow. Second operand 50 states and 7020 transitions. [2022-11-20 11:13:40,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1193 transitions, 14915 flow [2022-11-20 11:13:46,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 1193 transitions, 14697 flow, removed 12 selfloop flow, removed 21 redundant places. [2022-11-20 11:13:46,737 INFO L231 Difference]: Finished difference. Result has 508 places, 711 transitions, 8270 flow [2022-11-20 11:13:46,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=8270, PETRI_PLACES=508, PETRI_TRANSITIONS=711} [2022-11-20 11:13:46,738 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 360 predicate places. [2022-11-20 11:13:46,739 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 711 transitions, 8270 flow [2022-11-20 11:13:46,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.8421052631579) internal successors, (2619), 19 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states 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 11:13:46,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:13:46,740 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:46,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:46,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:13:46,948 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:13:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:46,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1806086283, now seen corresponding path program 9 times [2022-11-20 11:13:46,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:46,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594995972] [2022-11-20 11:13:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:46,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:13:47,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:47,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594995972] [2022-11-20 11:13:47,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594995972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:47,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613856208] [2022-11-20 11:13:47,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:13:47,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:47,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:47,211 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:13:47,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a98e2c-a091-4cba-99ae-74c904116393/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:13:47,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:13:47,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:13:47,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:13:47,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:13:47,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:13:47,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613856208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:47,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:13:47,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-20 11:13:47,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669899056] [2022-11-20 11:13:47,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:47,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:13:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:47,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:13:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:13:47,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-20 11:13:47,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 711 transitions, 8270 flow. Second operand has 19 states, 19 states have (on average 137.42105263157896) internal successors, (2611), 19 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states 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 11:13:47,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:13:47,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-20 11:13:47,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand