./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/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_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/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_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- 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 12:49:04,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:49:04,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:49:04,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:49:04,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:49:04,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:49:04,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:49:04,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:49:04,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:49:04,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:49:04,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:49:04,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:49:04,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:49:04,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:49:04,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:49:04,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:49:04,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:49:04,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:49:04,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:49:04,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:49:04,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:49:04,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:49:04,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:49:04,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:49:04,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:49:04,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:49:04,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:49:04,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:49:04,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:49:04,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:49:04,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:49:04,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:49:04,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:49:04,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:49:04,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:49:04,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:49:04,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:49:04,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:49:04,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:49:04,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:49:04,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:49:04,079 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:49:04,115 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:49:04,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:49:04,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:49:04,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:49:04,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:49:04,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:49:04,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:49:04,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:49:04,122 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:49:04,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:49:04,123 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:49:04,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:49:04,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:49:04,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:49:04,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:49:04,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:49:04,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:49:04,125 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:49:04,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:49:04,125 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:49:04,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:49:04,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:49:04,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:49:04,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:49:04,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:49:04,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:49:04,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:49:04,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:49:04,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:49:04,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:49:04,128 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:49:04,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:49:04,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:49:04,129 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_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2022-11-20 12:49:04,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:49:04,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:49:04,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:49:04,464 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:49:04,465 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:49:04,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2022-11-20 12:49:07,579 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:49:07,850 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:49:07,851 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2022-11-20 12:49:07,886 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/data/940634c67/3bea7a1ce2a44c509fbb99a467baa33a/FLAGe94340afa [2022-11-20 12:49:07,912 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/data/940634c67/3bea7a1ce2a44c509fbb99a467baa33a [2022-11-20 12:49:07,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:49:07,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:49:07,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:49:07,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:49:07,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:49:07,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:49:07" (1/1) ... [2022-11-20 12:49:07,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b101bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:07, skipping insertion in model container [2022-11-20 12:49:07,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:49:07" (1/1) ... [2022-11-20 12:49:07,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:49:07,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:49:08,161 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_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-11-20 12:49:08,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:49:08,598 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:49:08,611 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_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-11-20 12:49:08,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:49:08,778 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:49:08,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08 WrapperNode [2022-11-20 12:49:08,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:49:08,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:49:08,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:49:08,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:49:08,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (1/1) ... [2022-11-20 12:49:08,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (1/1) ... [2022-11-20 12:49:08,862 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-11-20 12:49:08,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:49:08,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:49:08,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:49:08,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:49:08,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (1/1) ... [2022-11-20 12:49:08,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (1/1) ... [2022-11-20 12:49:08,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (1/1) ... [2022-11-20 12:49:08,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (1/1) ... [2022-11-20 12:49:08,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (1/1) ... [2022-11-20 12:49:08,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (1/1) ... [2022-11-20 12:49:08,913 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (1/1) ... [2022-11-20 12:49:08,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (1/1) ... [2022-11-20 12:49:08,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:49:08,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:49:08,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:49:08,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:49:08,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (1/1) ... [2022-11-20 12:49:08,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:49:08,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:08,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:08,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:49:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:49:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:49:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:49:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:49:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 12:49:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:49:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-11-20 12:49:09,012 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-11-20 12:49:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:49:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:49:09,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:49:09,015 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 12:49:09,243 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:49:09,245 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:49:09,446 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:49:09,456 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:49:09,457 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 12:49:09,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:49:09 BoogieIcfgContainer [2022-11-20 12:49:09,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:49:09,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:49:09,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:49:09,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:49:09,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:49:07" (1/3) ... [2022-11-20 12:49:09,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d50bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:49:09, skipping insertion in model container [2022-11-20 12:49:09,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:08" (2/3) ... [2022-11-20 12:49:09,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d50bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:49:09, skipping insertion in model container [2022-11-20 12:49:09,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:49:09" (3/3) ... [2022-11-20 12:49:09,479 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-11-20 12:49:09,490 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:49:09,498 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:49:09,498 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:49:09,498 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:49:09,544 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 12:49:09,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 92 transitions, 192 flow [2022-11-20 12:49:09,623 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-11-20 12:49:09,623 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:49:09,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-11-20 12:49:09,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 92 transitions, 192 flow [2022-11-20 12:49:09,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 81 transitions, 168 flow [2022-11-20 12:49:09,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:49:09,664 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;@77081c83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:49:09,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:49:09,688 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2022-11-20 12:49:09,689 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:49:09,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:49:09,690 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] [2022-11-20 12:49:09,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:49:09,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1266078087, now seen corresponding path program 1 times [2022-11-20 12:49:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:09,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806876456] [2022-11-20 12:49:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:09,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:09,957 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 12:49:09,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:09,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806876456] [2022-11-20 12:49:09,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806876456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:09,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:09,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:49:09,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724860227] [2022-11-20 12:49:09,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:09,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:49:09,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:10,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:49:10,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:49:10,018 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 92 [2022-11-20 12:49:10,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 84.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 12:49:10,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:49:10,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 92 [2022-11-20 12:49:10,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:49:10,052 INFO L130 PetriNetUnfolder]: 2/75 cut-off events. [2022-11-20 12:49:10,053 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 12:49:10,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 2/75 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 4/76 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2022-11-20 12:49:10,055 INFO L137 encePairwiseOnDemand]: 88/92 looper letters, 2 selfloop transitions, 0 changer transitions 0/75 dead transitions. [2022-11-20 12:49:10,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 160 flow [2022-11-20 12:49:10,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:49:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:49:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 170 transitions. [2022-11-20 12:49:10,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9239130434782609 [2022-11-20 12:49:10,068 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 170 transitions. [2022-11-20 12:49:10,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 170 transitions. [2022-11-20 12:49:10,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:49:10,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 170 transitions. [2022-11-20 12:49:10,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 85.0) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 12:49:10,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 12:49:10,086 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 12:49:10,088 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 168 flow. Second operand 2 states and 170 transitions. [2022-11-20 12:49:10,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 160 flow [2022-11-20 12:49:10,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 12:49:10,100 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 152 flow [2022-11-20 12:49:10,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=152, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2022-11-20 12:49:10,109 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-11-20 12:49:10,110 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 152 flow [2022-11-20 12:49:10,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 12:49:10,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:49:10,111 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] [2022-11-20 12:49:10,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:49:10,112 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:49:10,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:10,113 INFO L85 PathProgramCache]: Analyzing trace with hash 398088453, now seen corresponding path program 1 times [2022-11-20 12:49:10,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:10,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053014480] [2022-11-20 12:49:10,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:10,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:10,301 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 12:49:10,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:10,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053014480] [2022-11-20 12:49:10,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053014480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:10,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:10,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:49:10,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234075246] [2022-11-20 12:49:10,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:10,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:49:10,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:49:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:49:10,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-11-20 12:49:10,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 12:49:10,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:49:10,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-11-20 12:49:10,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:49:10,348 INFO L130 PetriNetUnfolder]: 2/82 cut-off events. [2022-11-20 12:49:10,348 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:49:10,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 82 events. 2/82 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 95. Up to 10 conditions per place. [2022-11-20 12:49:10,349 INFO L137 encePairwiseOnDemand]: 89/92 looper letters, 10 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-11-20 12:49:10,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 182 flow [2022-11-20 12:49:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:49:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:49:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2022-11-20 12:49:10,352 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8623188405797102 [2022-11-20 12:49:10,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2022-11-20 12:49:10,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2022-11-20 12:49:10,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:49:10,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2022-11-20 12:49:10,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states 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 12:49:10,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 12:49:10,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 12:49:10,357 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 152 flow. Second operand 3 states and 238 transitions. [2022-11-20 12:49:10,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 182 flow [2022-11-20 12:49:10,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:49:10,360 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 164 flow [2022-11-20 12:49:10,360 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2022-11-20 12:49:10,361 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 0 predicate places. [2022-11-20 12:49:10,361 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 164 flow [2022-11-20 12:49:10,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 12:49:10,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:49:10,362 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] [2022-11-20 12:49:10,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:49:10,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:49:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1458126153, now seen corresponding path program 1 times [2022-11-20 12:49:10,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494947493] [2022-11-20 12:49:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:10,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:49:10,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:10,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494947493] [2022-11-20 12:49:10,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494947493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:10,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:10,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:49:10,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235095759] [2022-11-20 12:49:10,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:10,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:49:10,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:49:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:49:10,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 92 [2022-11-20 12:49:10,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states 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 12:49:10,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:49:10,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 92 [2022-11-20 12:49:10,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:49:10,624 INFO L130 PetriNetUnfolder]: 2/92 cut-off events. [2022-11-20 12:49:10,625 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:49:10,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 92 events. 2/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 109. Up to 9 conditions per place. [2022-11-20 12:49:10,626 INFO L137 encePairwiseOnDemand]: 89/92 looper letters, 9 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-11-20 12:49:10,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 79 transitions, 192 flow [2022-11-20 12:49:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:49:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:49:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2022-11-20 12:49:10,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8695652173913043 [2022-11-20 12:49:10,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2022-11-20 12:49:10,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2022-11-20 12:49:10,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:49:10,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2022-11-20 12:49:10,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 12:49:10,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 12:49:10,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 12:49:10,633 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 164 flow. Second operand 3 states and 240 transitions. [2022-11-20 12:49:10,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 79 transitions, 192 flow [2022-11-20 12:49:10,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:49:10,635 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 174 flow [2022-11-20 12:49:10,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2022-11-20 12:49:10,637 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2022-11-20 12:49:10,637 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 174 flow [2022-11-20 12:49:10,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states 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 12:49:10,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:49:10,638 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:10,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:49:10,638 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:49:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -238343497, now seen corresponding path program 1 times [2022-11-20 12:49:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:10,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130516101] [2022-11-20 12:49:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:10,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:10,807 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 12:49:10,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:10,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130516101] [2022-11-20 12:49:10,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130516101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:10,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506641831] [2022-11-20 12:49:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:10,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:10,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:10,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:10,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:49:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:10,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:49:10,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:11,008 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 12:49:11,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:11,062 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 12:49:11,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506641831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:11,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:11,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:49:11,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504754620] [2022-11-20 12:49:11,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:11,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:49:11,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:49:11,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:49:11,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-11-20 12:49:11,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 174 flow. Second operand has 10 states, 10 states have (on average 76.9) internal successors, (769), 10 states have internal predecessors, (769), 0 states have call successors, (0), 0 states 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 12:49:11,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:49:11,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-11-20 12:49:11,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:49:11,199 INFO L130 PetriNetUnfolder]: 2/105 cut-off events. [2022-11-20 12:49:11,200 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 12:49:11,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 105 events. 2/105 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 2/106 useless extension candidates. Maximal degree in co-relation 134. Up to 7 conditions per place. [2022-11-20 12:49:11,201 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 9 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2022-11-20 12:49:11,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 228 flow [2022-11-20 12:49:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:49:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:49:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 695 transitions. [2022-11-20 12:49:11,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8393719806763285 [2022-11-20 12:49:11,206 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 695 transitions. [2022-11-20 12:49:11,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 695 transitions. [2022-11-20 12:49:11,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:49:11,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 695 transitions. [2022-11-20 12:49:11,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 77.22222222222223) internal successors, (695), 9 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 12:49:11,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 12:49:11,213 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 12:49:11,213 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 174 flow. Second operand 9 states and 695 transitions. [2022-11-20 12:49:11,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 228 flow [2022-11-20 12:49:11,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 85 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:49:11,216 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 222 flow [2022-11-20 12:49:11,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=222, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2022-11-20 12:49:11,217 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2022-11-20 12:49:11,217 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 222 flow [2022-11-20 12:49:11,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.9) internal successors, (769), 10 states have internal predecessors, (769), 0 states have call successors, (0), 0 states 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 12:49:11,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:49:11,218 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:49:11,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:11,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:11,424 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:49:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:11,425 INFO L85 PathProgramCache]: Analyzing trace with hash -854969481, now seen corresponding path program 2 times [2022-11-20 12:49:11,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:11,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924133016] [2022-11-20 12:49:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:11,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 12:49:11,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924133016] [2022-11-20 12:49:11,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924133016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:11,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054371191] [2022-11-20 12:49:11,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:49:11,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:11,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:11,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:11,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:49:11,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:49:11,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:11,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:49:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 12:49:11,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 12:49:11,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054371191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:11,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:11,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:49:11,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360712633] [2022-11-20 12:49:11,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:11,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:49:11,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:49:11,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:49:11,852 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 92 [2022-11-20 12:49:11,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 222 flow. Second operand has 10 states, 10 states have (on average 76.0) internal successors, (760), 10 states have internal predecessors, (760), 0 states have call successors, (0), 0 states 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 12:49:11,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:49:11,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 92 [2022-11-20 12:49:11,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:49:11,959 INFO L130 PetriNetUnfolder]: 2/115 cut-off events. [2022-11-20 12:49:11,960 INFO L131 PetriNetUnfolder]: For 7/21 co-relation queries the response was YES. [2022-11-20 12:49:11,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 115 events. 2/115 cut-off events. For 7/21 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 9/123 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2022-11-20 12:49:11,965 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 10 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2022-11-20 12:49:11,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 91 transitions, 278 flow [2022-11-20 12:49:11,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:49:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:49:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 687 transitions. [2022-11-20 12:49:11,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8297101449275363 [2022-11-20 12:49:11,970 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 687 transitions. [2022-11-20 12:49:11,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 687 transitions. [2022-11-20 12:49:11,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:49:11,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 687 transitions. [2022-11-20 12:49:11,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 76.33333333333333) internal successors, (687), 9 states have internal predecessors, (687), 0 states have call successors, (0), 0 states 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 12:49:11,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 12:49:11,977 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 12:49:11,977 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 222 flow. Second operand 9 states and 687 transitions. [2022-11-20 12:49:11,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 91 transitions, 278 flow [2022-11-20 12:49:11,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 91 transitions, 272 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 12:49:11,985 INFO L231 Difference]: Finished difference. Result has 101 places, 89 transitions, 266 flow [2022-11-20 12:49:11,986 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=266, PETRI_PLACES=101, PETRI_TRANSITIONS=89} [2022-11-20 12:49:11,989 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 22 predicate places. [2022-11-20 12:49:11,989 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 89 transitions, 266 flow [2022-11-20 12:49:11,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.0) internal successors, (760), 10 states have internal predecessors, (760), 0 states have call successors, (0), 0 states 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 12:49:11,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:49:11,990 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:49:11,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:12,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:12,196 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:49:12,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:12,197 INFO L85 PathProgramCache]: Analyzing trace with hash 195641243, now seen corresponding path program 3 times [2022-11-20 12:49:12,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:12,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018684309] [2022-11-20 12:49:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:12,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:49:12,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:12,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018684309] [2022-11-20 12:49:12,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018684309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:12,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684468271] [2022-11-20 12:49:12,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:49:12,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:12,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:12,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:12,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:49:12,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 12:49:12,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:49:12,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:49:12,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:49:12,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684468271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:12,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:12,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 12:49:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169487702] [2022-11-20 12:49:12,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:12,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:49:12,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:49:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:49:12,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-11-20 12:49:12,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 89 transitions, 266 flow. Second operand has 18 states, 18 states have (on average 76.94444444444444) internal successors, (1385), 18 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states 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 12:49:12,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:49:12,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-11-20 12:49:12,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:49:13,116 INFO L130 PetriNetUnfolder]: 2/159 cut-off events. [2022-11-20 12:49:13,116 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-11-20 12:49:13,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 159 events. 2/159 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 4/162 useless extension candidates. Maximal degree in co-relation 265. Up to 11 conditions per place. [2022-11-20 12:49:13,118 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 13 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2022-11-20 12:49:13,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 107 transitions, 422 flow [2022-11-20 12:49:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:49:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 12:49:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1613 transitions. [2022-11-20 12:49:13,123 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8348861283643892 [2022-11-20 12:49:13,123 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1613 transitions. [2022-11-20 12:49:13,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1613 transitions. [2022-11-20 12:49:13,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:49:13,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1613 transitions. [2022-11-20 12:49:13,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 76.80952380952381) internal successors, (1613), 21 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states 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 12:49:13,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 92.0) internal successors, (2024), 22 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states 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 12:49:13,133 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 92.0) internal successors, (2024), 22 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states 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 12:49:13,133 INFO L175 Difference]: Start difference. First operand has 101 places, 89 transitions, 266 flow. Second operand 21 states and 1613 transitions. [2022-11-20 12:49:13,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 107 transitions, 422 flow [2022-11-20 12:49:13,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 107 transitions, 416 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 12:49:13,138 INFO L231 Difference]: Finished difference. Result has 125 places, 102 transitions, 390 flow [2022-11-20 12:49:13,138 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=390, PETRI_PLACES=125, PETRI_TRANSITIONS=102} [2022-11-20 12:49:13,139 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 46 predicate places. [2022-11-20 12:49:13,139 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 102 transitions, 390 flow [2022-11-20 12:49:13,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 76.94444444444444) internal successors, (1385), 18 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states 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 12:49:13,140 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:49:13,140 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:49:13,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:13,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:13,347 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:49:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1474879205, now seen corresponding path program 4 times [2022-11-20 12:49:13,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:13,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290226464] [2022-11-20 12:49:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:13,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:49:13,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:13,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290226464] [2022-11-20 12:49:13,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290226464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:13,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440232609] [2022-11-20 12:49:13,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:49:13,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:14,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:14,003 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:14,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:49:14,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:49:14,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:14,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:49:14,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:49:14,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:49:14,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440232609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:14,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:14,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 12:49:14,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712743470] [2022-11-20 12:49:14,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:14,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 12:49:14,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 12:49:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 12:49:14,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-11-20 12:49:14,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 102 transitions, 390 flow. Second operand has 34 states, 34 states have (on average 76.97058823529412) internal successors, (2617), 34 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states 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 12:49:14,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:49:14,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-11-20 12:49:14,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:49:15,472 INFO L130 PetriNetUnfolder]: 2/247 cut-off events. [2022-11-20 12:49:15,473 INFO L131 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2022-11-20 12:49:15,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 247 events. 2/247 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 8/254 useless extension candidates. Maximal degree in co-relation 515. Up to 27 conditions per place. [2022-11-20 12:49:15,477 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 21 selfloop transitions, 45 changer transitions 0/139 dead transitions. [2022-11-20 12:49:15,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 139 transitions, 810 flow [2022-11-20 12:49:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 12:49:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 12:49:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3449 transitions. [2022-11-20 12:49:15,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8330917874396135 [2022-11-20 12:49:15,485 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3449 transitions. [2022-11-20 12:49:15,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3449 transitions. [2022-11-20 12:49:15,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:49:15,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3449 transitions. [2022-11-20 12:49:15,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 76.64444444444445) internal successors, (3449), 45 states have internal predecessors, (3449), 0 states have call successors, (0), 0 states 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 12:49:15,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 92.0) internal successors, (4232), 46 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states 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 12:49:15,506 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 92.0) internal successors, (4232), 46 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states 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 12:49:15,506 INFO L175 Difference]: Start difference. First operand has 125 places, 102 transitions, 390 flow. Second operand 45 states and 3449 transitions. [2022-11-20 12:49:15,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 139 transitions, 810 flow [2022-11-20 12:49:15,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 139 transitions, 770 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 12:49:15,513 INFO L231 Difference]: Finished difference. Result has 172 places, 127 transitions, 668 flow [2022-11-20 12:49:15,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=668, PETRI_PLACES=172, PETRI_TRANSITIONS=127} [2022-11-20 12:49:15,514 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 93 predicate places. [2022-11-20 12:49:15,514 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 127 transitions, 668 flow [2022-11-20 12:49:15,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 76.97058823529412) internal successors, (2617), 34 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states 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 12:49:15,516 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:49:15,516 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:49:15,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:15,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:15,722 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:49:15,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:15,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1963548891, now seen corresponding path program 5 times [2022-11-20 12:49:15,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:15,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186295998] [2022-11-20 12:49:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:15,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 1170 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:49:17,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:17,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186295998] [2022-11-20 12:49:17,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186295998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:17,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569752698] [2022-11-20 12:49:17,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:49:17,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:17,195 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:17,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:49:17,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-20 12:49:17,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:17,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:49:17,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1170 trivial. 0 not checked. [2022-11-20 12:49:17,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1170 trivial. 0 not checked. [2022-11-20 12:49:17,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569752698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:17,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:17,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 9, 9] total 47 [2022-11-20 12:49:17,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165898948] [2022-11-20 12:49:17,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 12:49:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:17,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 12:49:17,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 12:49:17,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 92 [2022-11-20 12:49:17,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 127 transitions, 668 flow. Second operand has 47 states, 47 states have (on average 69.27659574468085) internal successors, (3256), 47 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states 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 12:49:17,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:49:17,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 92 [2022-11-20 12:49:17,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:50:31,098 INFO L130 PetriNetUnfolder]: 2171/7669 cut-off events. [2022-11-20 12:50:31,098 INFO L131 PetriNetUnfolder]: For 19846/19846 co-relation queries the response was YES. [2022-11-20 12:50:31,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23257 conditions, 7669 events. 2171/7669 cut-off events. For 19846/19846 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 55540 event pairs, 18 based on Foata normal form. 311/7976 useless extension candidates. Maximal degree in co-relation 23232. Up to 899 conditions per place. [2022-11-20 12:50:31,176 INFO L137 encePairwiseOnDemand]: 81/92 looper letters, 934 selfloop transitions, 1927 changer transitions 0/2919 dead transitions. [2022-11-20 12:50:31,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1112 places, 2919 transitions, 26206 flow [2022-11-20 12:50:31,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 941 states. [2022-11-20 12:50:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 941 states. [2022-11-20 12:50:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 66116 transitions. [2022-11-20 12:50:31,294 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7637111306195998 [2022-11-20 12:50:31,294 INFO L72 ComplementDD]: Start complementDD. Operand 941 states and 66116 transitions. [2022-11-20 12:50:31,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 941 states and 66116 transitions. [2022-11-20 12:50:31,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:50:31,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 941 states and 66116 transitions. [2022-11-20 12:50:31,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 942 states, 941 states have (on average 70.2614240170032) internal successors, (66116), 941 states have internal predecessors, (66116), 0 states have call successors, (0), 0 states 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 12:50:31,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 942 states, 942 states have (on average 92.0) internal successors, (86664), 942 states have internal predecessors, (86664), 0 states have call successors, (0), 0 states 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 12:50:31,660 INFO L81 ComplementDD]: Finished complementDD. Result has 942 states, 942 states have (on average 92.0) internal successors, (86664), 942 states have internal predecessors, (86664), 0 states have call successors, (0), 0 states 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 12:50:31,660 INFO L175 Difference]: Start difference. First operand has 172 places, 127 transitions, 668 flow. Second operand 941 states and 66116 transitions. [2022-11-20 12:50:31,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1112 places, 2919 transitions, 26206 flow [2022-11-20 12:50:31,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1094 places, 2919 transitions, 25046 flow, removed 220 selfloop flow, removed 18 redundant places. [2022-11-20 12:50:31,783 INFO L231 Difference]: Finished difference. Result has 1374 places, 2114 transitions, 18804 flow [2022-11-20 12:50:31,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=941, PETRI_FLOW=18804, PETRI_PLACES=1374, PETRI_TRANSITIONS=2114} [2022-11-20 12:50:31,787 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1295 predicate places. [2022-11-20 12:50:31,787 INFO L495 AbstractCegarLoop]: Abstraction has has 1374 places, 2114 transitions, 18804 flow [2022-11-20 12:50:31,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 69.27659574468085) internal successors, (3256), 47 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states 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 12:50:31,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:50:31,788 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:50:31,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:31,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:31,995 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:50:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:31,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1271711925, now seen corresponding path program 6 times [2022-11-20 12:50:31,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:31,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121962017] [2022-11-20 12:50:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:31,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 31 proven. 175 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2022-11-20 12:50:32,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:32,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121962017] [2022-11-20 12:50:32,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121962017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:32,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062707901] [2022-11-20 12:50:32,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:50:32,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:32,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:32,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:32,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:50:33,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-20 12:50:33,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:50:33,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:50:33,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 31 proven. 175 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2022-11-20 12:50:33,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 31 proven. 175 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2022-11-20 12:50:34,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062707901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:34,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:34,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 12:50:34,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137889216] [2022-11-20 12:50:34,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:34,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 12:50:34,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 12:50:34,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 12:50:34,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 92 [2022-11-20 12:50:34,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1374 places, 2114 transitions, 18804 flow. Second operand has 34 states, 34 states have (on average 76.0) internal successors, (2584), 34 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states 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 12:50:34,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:50:34,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 92 [2022-11-20 12:50:34,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:50:42,291 INFO L130 PetriNetUnfolder]: 2670/11867 cut-off events. [2022-11-20 12:50:42,292 INFO L131 PetriNetUnfolder]: For 1197827/1198908 co-relation queries the response was YES. [2022-11-20 12:50:42,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42867 conditions, 11867 events. 2670/11867 cut-off events. For 1197827/1198908 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 99253 event pairs, 38 based on Foata normal form. 89/11807 useless extension candidates. Maximal degree in co-relation 42562. Up to 1268 conditions per place. [2022-11-20 12:50:42,696 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 482 selfloop transitions, 2115 changer transitions 0/3623 dead transitions. [2022-11-20 12:50:42,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1418 places, 3623 transitions, 36338 flow [2022-11-20 12:50:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 12:50:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 12:50:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3405 transitions. [2022-11-20 12:50:42,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.822463768115942 [2022-11-20 12:50:42,703 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3405 transitions. [2022-11-20 12:50:42,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3405 transitions. [2022-11-20 12:50:42,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:50:42,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3405 transitions. [2022-11-20 12:50:42,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 75.66666666666667) internal successors, (3405), 45 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states 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 12:50:42,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 92.0) internal successors, (4232), 46 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states 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 12:50:42,719 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 92.0) internal successors, (4232), 46 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states 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 12:50:42,719 INFO L175 Difference]: Start difference. First operand has 1374 places, 2114 transitions, 18804 flow. Second operand 45 states and 3405 transitions. [2022-11-20 12:50:42,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1418 places, 3623 transitions, 36338 flow [2022-11-20 12:50:45,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1370 places, 3623 transitions, 32698 flow, removed 698 selfloop flow, removed 48 redundant places. [2022-11-20 12:50:45,760 INFO L231 Difference]: Finished difference. Result has 1379 places, 3289 transitions, 29374 flow [2022-11-20 12:50:45,763 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=15916, PETRI_DIFFERENCE_MINUEND_PLACES=1326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=29374, PETRI_PLACES=1379, PETRI_TRANSITIONS=3289} [2022-11-20 12:50:45,764 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1300 predicate places. [2022-11-20 12:50:45,764 INFO L495 AbstractCegarLoop]: Abstraction has has 1379 places, 3289 transitions, 29374 flow [2022-11-20 12:50:45,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 76.0) internal successors, (2584), 34 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states 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 12:50:45,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:50:45,765 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:50:45,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:45,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:45,969 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:50:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:45,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1026900943, now seen corresponding path program 7 times [2022-11-20 12:50:45,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:45,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815756852] [2022-11-20 12:50:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:45,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 0 proven. 1336 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-11-20 12:50:47,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:47,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815756852] [2022-11-20 12:50:47,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815756852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:47,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930594677] [2022-11-20 12:50:47,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:50:47,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:47,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:47,608 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:47,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:50:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:47,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 12:50:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 0 proven. 1336 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-11-20 12:50:48,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 0 proven. 1336 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-11-20 12:50:49,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930594677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:49,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:49,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 43 [2022-11-20 12:50:49,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53830834] [2022-11-20 12:50:49,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:49,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 12:50:49,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:49,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 12:50:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 12:50:49,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-11-20 12:50:49,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1379 places, 3289 transitions, 29374 flow. Second operand has 43 states, 43 states have (on average 77.02325581395348) internal successors, (3312), 43 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states 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 12:50:49,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:50:49,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-11-20 12:50:49,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:50:59,594 INFO L130 PetriNetUnfolder]: 2895/12850 cut-off events. [2022-11-20 12:50:59,594 INFO L131 PetriNetUnfolder]: For 642053/643720 co-relation queries the response was YES. [2022-11-20 12:50:59,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52384 conditions, 12850 events. 2895/12850 cut-off events. For 642053/643720 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 110589 event pairs, 127 based on Foata normal form. 331/12993 useless extension candidates. Maximal degree in co-relation 52070. Up to 1334 conditions per place. [2022-11-20 12:51:00,041 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 26 selfloop transitions, 1029 changer transitions 0/3374 dead transitions. [2022-11-20 12:51:00,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1438 places, 3374 transitions, 32998 flow [2022-11-20 12:51:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-20 12:51:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-20 12:51:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4590 transitions. [2022-11-20 12:51:00,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8315217391304348 [2022-11-20 12:51:00,047 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4590 transitions. [2022-11-20 12:51:00,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4590 transitions. [2022-11-20 12:51:00,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:51:00,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4590 transitions. [2022-11-20 12:51:00,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 76.5) internal successors, (4590), 60 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states 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 12:51:00,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 92.0) internal successors, (5612), 61 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states 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 12:51:00,060 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 92.0) internal successors, (5612), 61 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states 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 12:51:00,061 INFO L175 Difference]: Start difference. First operand has 1379 places, 3289 transitions, 29374 flow. Second operand 60 states and 4590 transitions. [2022-11-20 12:51:00,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1438 places, 3374 transitions, 32998 flow [2022-11-20 12:51:04,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1420 places, 3374 transitions, 31306 flow, removed 0 selfloop flow, removed 18 redundant places. [2022-11-20 12:51:04,668 INFO L231 Difference]: Finished difference. Result has 1425 places, 3358 transitions, 31165 flow [2022-11-20 12:51:04,670 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=27682, PETRI_DIFFERENCE_MINUEND_PLACES=1361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=962, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=31165, PETRI_PLACES=1425, PETRI_TRANSITIONS=3358} [2022-11-20 12:51:04,671 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1346 predicate places. [2022-11-20 12:51:04,671 INFO L495 AbstractCegarLoop]: Abstraction has has 1425 places, 3358 transitions, 31165 flow [2022-11-20 12:51:04,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.02325581395348) internal successors, (3312), 43 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states 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 12:51:04,671 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:51:04,672 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:51:04,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:04,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:51:04,873 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:51:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:04,873 INFO L85 PathProgramCache]: Analyzing trace with hash -654352107, now seen corresponding path program 8 times [2022-11-20 12:51:04,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:04,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669194971] [2022-11-20 12:51:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:04,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 607 proven. 855 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2022-11-20 12:51:06,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:06,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669194971] [2022-11-20 12:51:06,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669194971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:06,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365204970] [2022-11-20 12:51:06,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:51:06,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:06,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:06,554 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:06,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:51:06,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:51:06,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:51:06,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 12:51:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 607 proven. 855 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2022-11-20 12:51:07,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 607 proven. 855 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2022-11-20 12:51:07,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365204970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:07,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:07,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 43 [2022-11-20 12:51:07,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479805470] [2022-11-20 12:51:07,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:07,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 12:51:07,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:07,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 12:51:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 12:51:07,817 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 92 [2022-11-20 12:51:07,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1425 places, 3358 transitions, 31165 flow. Second operand has 43 states, 43 states have (on average 76.04651162790698) internal successors, (3270), 43 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states 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 12:51:07,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:51:07,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 92 [2022-11-20 12:51:07,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:51:22,659 INFO L130 PetriNetUnfolder]: 3919/17306 cut-off events. [2022-11-20 12:51:22,660 INFO L131 PetriNetUnfolder]: For 2343838/2346221 co-relation queries the response was YES. [2022-11-20 12:51:23,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70937 conditions, 17306 events. 3919/17306 cut-off events. For 2343838/2346221 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 157717 event pairs, 167 based on Foata normal form. 240/17280 useless extension candidates. Maximal degree in co-relation 70618. Up to 1775 conditions per place. [2022-11-20 12:51:23,890 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 717 selfloop transitions, 2820 changer transitions 0/4632 dead transitions. [2022-11-20 12:51:23,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1484 places, 4632 transitions, 52365 flow [2022-11-20 12:51:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-20 12:51:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-20 12:51:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4532 transitions. [2022-11-20 12:51:23,896 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8210144927536231 [2022-11-20 12:51:23,896 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4532 transitions. [2022-11-20 12:51:23,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4532 transitions. [2022-11-20 12:51:23,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:51:23,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4532 transitions. [2022-11-20 12:51:23,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 75.53333333333333) internal successors, (4532), 60 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states 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 12:51:23,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 92.0) internal successors, (5612), 61 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states 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 12:51:23,911 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 92.0) internal successors, (5612), 61 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states 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 12:51:23,911 INFO L175 Difference]: Start difference. First operand has 1425 places, 3358 transitions, 31165 flow. Second operand 60 states and 4532 transitions. [2022-11-20 12:51:23,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1484 places, 4632 transitions, 52365 flow [2022-11-20 12:51:29,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1409 places, 4632 transitions, 50135 flow, removed 155 selfloop flow, removed 75 redundant places. [2022-11-20 12:51:29,635 INFO L231 Difference]: Finished difference. Result has 1415 places, 4110 transitions, 42763 flow [2022-11-20 12:51:29,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=28935, PETRI_DIFFERENCE_MINUEND_PLACES=1350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=42763, PETRI_PLACES=1415, PETRI_TRANSITIONS=4110} [2022-11-20 12:51:29,639 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1336 predicate places. [2022-11-20 12:51:29,640 INFO L495 AbstractCegarLoop]: Abstraction has has 1415 places, 4110 transitions, 42763 flow [2022-11-20 12:51:29,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 76.04651162790698) internal successors, (3270), 43 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states 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 12:51:29,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:51:29,641 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:51:29,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:29,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:29,847 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:51:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:29,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1678086839, now seen corresponding path program 9 times [2022-11-20 12:51:29,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:29,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418042390] [2022-11-20 12:51:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:29,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:35,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:35,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418042390] [2022-11-20 12:51:35,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418042390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:35,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628126151] [2022-11-20 12:51:35,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:51:35,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:35,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:35,848 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:35,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2498b8-1a7f-4d14-9194-0a1fd61cb1a0/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:51:36,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-20 12:51:36,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:51:36,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 168 conjunts are in the unsatisfiable core [2022-11-20 12:51:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:38,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:39,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628126151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:39,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:39,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 70 [2022-11-20 12:51:39,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136666258] [2022-11-20 12:51:39,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:39,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-20 12:51:39,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:39,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-20 12:51:39,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 12:51:39,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2022-11-20 12:51:39,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1415 places, 4110 transitions, 42763 flow. Second operand has 70 states, 70 states have (on average 71.32857142857142) internal successors, (4993), 70 states have internal predecessors, (4993), 0 states have call successors, (0), 0 states 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 12:51:39,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:51:39,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2022-11-20 12:51:39,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand