./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8 --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 ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 --- 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-2329fc7 [2022-12-13 13:10:13,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:10:13,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:10:13,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:10:13,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:10:13,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:10:13,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:10:13,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:10:13,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:10:13,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:10:13,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:10:13,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:10:13,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:10:13,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:10:13,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:10:13,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:10:13,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:10:13,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:10:13,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:10:13,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:10:13,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:10:13,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:10:13,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:10:13,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:10:13,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:10:13,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:10:13,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:10:13,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:10:13,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:10:13,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:10:13,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:10:13,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:10:13,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:10:13,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:10:13,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:10:13,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:10:13,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:10:13,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:10:13,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:10:13,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:10:13,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:10:13,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:10:13,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:10:13,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:10:13,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:10:13,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:10:13,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:10:13,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:10:13,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:10:13,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:10:13,149 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:10:13,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:10:13,150 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:10:13,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:10:13,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:10:13,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:10:13,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:10:13,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:10:13,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:10:13,151 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:10:13,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:10:13,151 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:10:13,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:10:13,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:10:13,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:10:13,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:10:13,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:10:13,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:10:13,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:10:13,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:10:13,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:10:13,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:10:13,153 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:10:13,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:10:13,154 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:10:13,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:10:13,154 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:10:13,154 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 [2022-12-13 13:10:13,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:10:13,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:10:13,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:10:13,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:10:13,371 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:10:13,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i [2022-12-13 13:10:15,974 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:10:16,183 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:10:16,183 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i [2022-12-13 13:10:16,195 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/data/f6e56cbb0/3c7105b6325443d3bbc0dcd41f16bcf4/FLAG8c2f98316 [2022-12-13 13:10:16,563 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/data/f6e56cbb0/3c7105b6325443d3bbc0dcd41f16bcf4 [2022-12-13 13:10:16,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:10:16,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:10:16,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:10:16,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:10:16,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:10:16,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44777581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16, skipping insertion in model container [2022-12-13 13:10:16,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:10:16,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:10:16,794 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_fe3256fb-dca5-49b2-a62d-dd457cf00838/sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i[30176,30189] [2022-12-13 13:10:16,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:10:16,819 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:10:16,843 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_fe3256fb-dca5-49b2-a62d-dd457cf00838/sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i[30176,30189] [2022-12-13 13:10:16,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:10:16,870 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:10:16,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16 WrapperNode [2022-12-13 13:10:16,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:10:16,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:10:16,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:10:16,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:10:16,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,901 INFO L138 Inliner]: procedures = 170, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 141 [2022-12-13 13:10:16,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:10:16,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:10:16,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:10:16,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:10:16,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,925 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:10:16,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:10:16,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:10:16,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:10:16,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (1/1) ... [2022-12-13 13:10:16,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:10:16,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:10:16,958 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:10:16,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:10:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:10:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:10:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 13:10:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:10:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:10:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 13:10:16,991 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 13:10:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:10:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:10:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:10:16,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:10:16,992 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:10:17,084 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:10:17,085 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:10:17,275 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:10:17,281 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:10:17,281 INFO L300 CfgBuilder]: Removed 18 assume(true) statements. [2022-12-13 13:10:17,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:10:17 BoogieIcfgContainer [2022-12-13 13:10:17,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:10:17,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:10:17,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:10:17,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:10:17,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:10:16" (1/3) ... [2022-12-13 13:10:17,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a56623f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:10:17, skipping insertion in model container [2022-12-13 13:10:17,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:10:16" (2/3) ... [2022-12-13 13:10:17,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a56623f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:10:17, skipping insertion in model container [2022-12-13 13:10:17,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:10:17" (3/3) ... [2022-12-13 13:10:17,289 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2022-12-13 13:10:17,295 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 13:10:17,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:10:17,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 13:10:17,303 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:10:17,344 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 13:10:17,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 146 transitions, 300 flow [2022-12-13 13:10:17,419 INFO L130 PetriNetUnfolder]: 33/204 cut-off events. [2022-12-13 13:10:17,419 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 13:10:17,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 204 events. 33/204 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 669 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-12-13 13:10:17,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 146 transitions, 300 flow [2022-12-13 13:10:17,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 141 transitions, 287 flow [2022-12-13 13:10:17,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:10:17,438 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 141 transitions, 287 flow [2022-12-13 13:10:17,440 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 141 transitions, 287 flow [2022-12-13 13:10:17,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 141 transitions, 287 flow [2022-12-13 13:10:17,468 INFO L130 PetriNetUnfolder]: 32/199 cut-off events. [2022-12-13 13:10:17,468 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:10:17,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 199 events. 32/199 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 656 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-12-13 13:10:17,472 INFO L119 LiptonReduction]: Number of co-enabled transitions 6016 [2022-12-13 13:10:19,145 INFO L134 LiptonReduction]: Checked pairs total: 14947 [2022-12-13 13:10:19,146 INFO L136 LiptonReduction]: Total number of compositions: 106 [2022-12-13 13:10:19,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:10:19,160 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;@77556c07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:10:19,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 13:10:19,164 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2022-12-13 13:10:19,164 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:10:19,164 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:19,165 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:10:19,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:10:19,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:19,169 INFO L85 PathProgramCache]: Analyzing trace with hash 538379661, now seen corresponding path program 1 times [2022-12-13 13:10:19,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:19,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025681436] [2022-12-13 13:10:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:19,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:19,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:19,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025681436] [2022-12-13 13:10:19,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025681436] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:19,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:19,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:10:19,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419416891] [2022-12-13 13:10:19,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:19,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:10:19,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:19,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:10:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:10:19,362 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 252 [2022-12-13 13:10:19,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 59 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:19,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:10:19,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 252 [2022-12-13 13:10:19,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:10:19,472 INFO L130 PetriNetUnfolder]: 196/499 cut-off events. [2022-12-13 13:10:19,473 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:10:19,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 499 events. 196/499 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2373 event pairs, 72 based on Foata normal form. 56/493 useless extension candidates. Maximal degree in co-relation 891. Up to 391 conditions per place. [2022-12-13 13:10:19,476 INFO L137 encePairwiseOnDemand]: 231/252 looper letters, 44 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2022-12-13 13:10:19,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 211 flow [2022-12-13 13:10:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:10:19,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:10:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2022-12-13 13:10:19,486 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2022-12-13 13:10:19,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2022-12-13 13:10:19,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2022-12-13 13:10:19,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:10:19,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2022-12-13 13:10:19,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:19,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:19,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:19,500 INFO L175 Difference]: Start difference. First operand has 44 places, 59 transitions, 123 flow. Second operand 3 states and 427 transitions. [2022-12-13 13:10:19,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 211 flow [2022-12-13 13:10:19,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:10:19,506 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 95 flow [2022-12-13 13:10:19,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2022-12-13 13:10:19,511 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2022-12-13 13:10:19,511 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 95 flow [2022-12-13 13:10:19,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:19,512 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:19,512 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 13:10:19,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:10:19,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:10:19,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:19,514 INFO L85 PathProgramCache]: Analyzing trace with hash -493354607, now seen corresponding path program 1 times [2022-12-13 13:10:19,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:19,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644370127] [2022-12-13 13:10:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:19,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:10:19,544 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:10:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:10:19,580 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:10:19,580 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:10:19,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 13:10:19,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 13:10:19,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 13:10:19,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 13:10:19,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:10:19,585 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 13:10:19,587 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:10:19,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 13:10:19,606 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 13:10:19,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 195 transitions, 408 flow [2022-12-13 13:10:19,653 INFO L130 PetriNetUnfolder]: 57/336 cut-off events. [2022-12-13 13:10:19,653 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 13:10:19,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 336 events. 57/336 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1289 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 206. Up to 9 conditions per place. [2022-12-13 13:10:19,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 195 transitions, 408 flow [2022-12-13 13:10:19,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 195 transitions, 408 flow [2022-12-13 13:10:19,660 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:10:19,660 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 195 transitions, 408 flow [2022-12-13 13:10:19,660 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 195 transitions, 408 flow [2022-12-13 13:10:19,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 195 transitions, 408 flow [2022-12-13 13:10:19,695 INFO L130 PetriNetUnfolder]: 57/336 cut-off events. [2022-12-13 13:10:19,695 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 13:10:19,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 336 events. 57/336 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1289 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 206. Up to 9 conditions per place. [2022-12-13 13:10:19,702 INFO L119 LiptonReduction]: Number of co-enabled transitions 17484 [2022-12-13 13:10:21,578 INFO L134 LiptonReduction]: Checked pairs total: 47288 [2022-12-13 13:10:21,579 INFO L136 LiptonReduction]: Total number of compositions: 143 [2022-12-13 13:10:21,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:10:21,582 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;@77556c07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:10:21,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 13:10:21,584 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2022-12-13 13:10:21,584 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:10:21,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:21,584 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:10:21,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:10:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash 907404016, now seen corresponding path program 1 times [2022-12-13 13:10:21,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:21,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99454737] [2022-12-13 13:10:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:21,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:21,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:21,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99454737] [2022-12-13 13:10:21,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99454737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:21,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:21,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:10:21,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196400524] [2022-12-13 13:10:21,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:21,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:10:21,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:21,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:10:21,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:10:21,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 338 [2022-12-13 13:10:21,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 92 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:21,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:10:21,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 338 [2022-12-13 13:10:21,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:10:22,317 INFO L130 PetriNetUnfolder]: 5527/9411 cut-off events. [2022-12-13 13:10:22,317 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-12-13 13:10:22,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18012 conditions, 9411 events. 5527/9411 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 65322 event pairs, 3726 based on Foata normal form. 998/9060 useless extension candidates. Maximal degree in co-relation 6400. Up to 8495 conditions per place. [2022-12-13 13:10:22,348 INFO L137 encePairwiseOnDemand]: 310/338 looper letters, 60 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2022-12-13 13:10:22,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 306 flow [2022-12-13 13:10:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:10:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:10:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2022-12-13 13:10:22,352 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5532544378698225 [2022-12-13 13:10:22,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2022-12-13 13:10:22,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2022-12-13 13:10:22,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:10:22,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2022-12-13 13:10:22,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:22,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:22,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:22,358 INFO L175 Difference]: Start difference. First operand has 68 places, 92 transitions, 202 flow. Second operand 3 states and 561 transitions. [2022-12-13 13:10:22,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 306 flow [2022-12-13 13:10:22,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 82 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:10:22,361 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 164 flow [2022-12-13 13:10:22,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2022-12-13 13:10:22,362 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2022-12-13 13:10:22,362 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 164 flow [2022-12-13 13:10:22,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:22,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:22,363 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:10:22,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:10:22,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:10:22,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:22,363 INFO L85 PathProgramCache]: Analyzing trace with hash -122202535, now seen corresponding path program 1 times [2022-12-13 13:10:22,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:22,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413453747] [2022-12-13 13:10:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:22,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:22,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:22,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413453747] [2022-12-13 13:10:22,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413453747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:22,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:22,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:10:22,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959628154] [2022-12-13 13:10:22,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:22,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:10:22,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:22,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:10:22,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:10:22,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 338 [2022-12-13 13:10:22,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:22,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:10:22,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 338 [2022-12-13 13:10:22,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:10:23,491 INFO L130 PetriNetUnfolder]: 8274/14121 cut-off events. [2022-12-13 13:10:23,491 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-12-13 13:10:23,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27623 conditions, 14121 events. 8274/14121 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 100503 event pairs, 3488 based on Foata normal form. 0/12750 useless extension candidates. Maximal degree in co-relation 27567. Up to 6965 conditions per place. [2022-12-13 13:10:23,537 INFO L137 encePairwiseOnDemand]: 321/338 looper letters, 80 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2022-12-13 13:10:23,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 107 transitions, 432 flow [2022-12-13 13:10:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:10:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:10:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2022-12-13 13:10:23,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5325443786982249 [2022-12-13 13:10:23,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2022-12-13 13:10:23,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2022-12-13 13:10:23,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:10:23,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2022-12-13 13:10:23,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:23,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:23,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:23,542 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 164 flow. Second operand 3 states and 540 transitions. [2022-12-13 13:10:23,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 107 transitions, 432 flow [2022-12-13 13:10:23,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:10:23,545 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 260 flow [2022-12-13 13:10:23,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2022-12-13 13:10:23,545 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2022-12-13 13:10:23,545 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 260 flow [2022-12-13 13:10:23,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:23,546 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:23,546 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 13:10:23,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:10:23,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:10:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:23,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1425965358, now seen corresponding path program 1 times [2022-12-13 13:10:23,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:23,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466041020] [2022-12-13 13:10:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:23,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:10:23,557 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:10:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:10:23,567 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:10:23,567 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:10:23,568 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 13:10:23,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 13:10:23,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 13:10:23,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 13:10:23,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 13:10:23,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:10:23,568 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 13:10:23,569 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:10:23,569 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 13:10:23,591 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 13:10:23,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 244 transitions, 518 flow [2022-12-13 13:10:23,633 INFO L130 PetriNetUnfolder]: 86/501 cut-off events. [2022-12-13 13:10:23,633 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 13:10:23,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 501 events. 86/501 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2014 event pairs, 1 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 344. Up to 16 conditions per place. [2022-12-13 13:10:23,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 244 transitions, 518 flow [2022-12-13 13:10:23,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 244 transitions, 518 flow [2022-12-13 13:10:23,638 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:10:23,638 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 244 transitions, 518 flow [2022-12-13 13:10:23,639 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 244 transitions, 518 flow [2022-12-13 13:10:23,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 244 transitions, 518 flow [2022-12-13 13:10:23,698 INFO L130 PetriNetUnfolder]: 86/501 cut-off events. [2022-12-13 13:10:23,698 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 13:10:23,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 501 events. 86/501 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2014 event pairs, 1 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 344. Up to 16 conditions per place. [2022-12-13 13:10:23,712 INFO L119 LiptonReduction]: Number of co-enabled transitions 33276 [2022-12-13 13:10:25,568 INFO L134 LiptonReduction]: Checked pairs total: 98618 [2022-12-13 13:10:25,568 INFO L136 LiptonReduction]: Total number of compositions: 181 [2022-12-13 13:10:25,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:10:25,572 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;@77556c07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:10:25,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 13:10:25,574 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2022-12-13 13:10:25,574 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:10:25,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:25,574 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:10:25,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:10:25,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:25,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1358439422, now seen corresponding path program 1 times [2022-12-13 13:10:25,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:25,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486745498] [2022-12-13 13:10:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:25,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:25,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:25,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486745498] [2022-12-13 13:10:25,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486745498] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:25,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:25,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:10:25,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905977373] [2022-12-13 13:10:25,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:25,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:10:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:25,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:10:25,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:10:25,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 425 [2022-12-13 13:10:25,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 121 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:25,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:10:25,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 425 [2022-12-13 13:10:25,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:10:34,788 INFO L130 PetriNetUnfolder]: 111274/161651 cut-off events. [2022-12-13 13:10:34,788 INFO L131 PetriNetUnfolder]: For 1687/1687 co-relation queries the response was YES. [2022-12-13 13:10:34,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313661 conditions, 161651 events. 111274/161651 cut-off events. For 1687/1687 co-relation queries the response was YES. Maximal size of possible extension queue 4014. Compared 1291208 event pairs, 86290 based on Foata normal form. 24832/162675 useless extension candidates. Maximal degree in co-relation 36766. Up to 150574 conditions per place. [2022-12-13 13:10:35,392 INFO L137 encePairwiseOnDemand]: 389/425 looper letters, 74 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2022-12-13 13:10:35,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 102 transitions, 386 flow [2022-12-13 13:10:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:10:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:10:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 694 transitions. [2022-12-13 13:10:35,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5443137254901961 [2022-12-13 13:10:35,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 694 transitions. [2022-12-13 13:10:35,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 694 transitions. [2022-12-13 13:10:35,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:10:35,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 694 transitions. [2022-12-13 13:10:35,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:35,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:35,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:35,400 INFO L175 Difference]: Start difference. First operand has 89 places, 121 transitions, 272 flow. Second operand 3 states and 694 transitions. [2022-12-13 13:10:35,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 102 transitions, 386 flow [2022-12-13 13:10:35,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 102 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:10:35,404 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 218 flow [2022-12-13 13:10:35,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2022-12-13 13:10:35,405 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, 3 predicate places. [2022-12-13 13:10:35,405 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 218 flow [2022-12-13 13:10:35,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:35,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:35,406 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:10:35,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:10:35,406 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:10:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash 633475913, now seen corresponding path program 1 times [2022-12-13 13:10:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:35,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696330833] [2022-12-13 13:10:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:35,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:35,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:35,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696330833] [2022-12-13 13:10:35,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696330833] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:35,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:35,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:10:35,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564726222] [2022-12-13 13:10:35,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:35,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:10:35,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:35,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:10:35,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:10:35,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 425 [2022-12-13 13:10:35,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:35,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:10:35,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 425 [2022-12-13 13:10:35,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:10:50,931 INFO L130 PetriNetUnfolder]: 179255/264119 cut-off events. [2022-12-13 13:10:50,931 INFO L131 PetriNetUnfolder]: For 3091/3091 co-relation queries the response was YES. [2022-12-13 13:10:51,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515920 conditions, 264119 events. 179255/264119 cut-off events. For 3091/3091 co-relation queries the response was YES. Maximal size of possible extension queue 6342. Compared 2239791 event pairs, 74879 based on Foata normal form. 0/237903 useless extension candidates. Maximal degree in co-relation 515868. Up to 135914 conditions per place. [2022-12-13 13:10:52,043 INFO L137 encePairwiseOnDemand]: 402/425 looper letters, 103 selfloop transitions, 16 changer transitions 0/140 dead transitions. [2022-12-13 13:10:52,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 140 transitions, 567 flow [2022-12-13 13:10:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:10:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:10:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2022-12-13 13:10:52,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.523921568627451 [2022-12-13 13:10:52,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2022-12-13 13:10:52,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2022-12-13 13:10:52,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:10:52,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2022-12-13 13:10:52,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:52,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:52,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:52,052 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 218 flow. Second operand 3 states and 668 transitions. [2022-12-13 13:10:52,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 140 transitions, 567 flow [2022-12-13 13:10:52,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 140 transitions, 565 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:10:52,062 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 350 flow [2022-12-13 13:10:52,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2022-12-13 13:10:52,063 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, 6 predicate places. [2022-12-13 13:10:52,063 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 350 flow [2022-12-13 13:10:52,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:52,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:52,064 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:10:52,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:10:52,064 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:10:52,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:52,064 INFO L85 PathProgramCache]: Analyzing trace with hash -482263713, now seen corresponding path program 1 times [2022-12-13 13:10:52,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:52,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61344479] [2022-12-13 13:10:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:52,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:52,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:52,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61344479] [2022-12-13 13:10:52,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61344479] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:10:52,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976143453] [2022-12-13 13:10:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:52,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:10:52,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:10:52,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:10:52,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:10:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:52,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:10:52,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:10:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:52,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:10:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:52,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976143453] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:10:52,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:10:52,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 13:10:52,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231874519] [2022-12-13 13:10:52,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:10:52,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:10:52,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:10:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:10:52,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 425 [2022-12-13 13:10:52,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 193.85714285714286) internal successors, (1357), 7 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:52,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:10:52,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 425 [2022-12-13 13:10:52,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:10:52,560 INFO L130 PetriNetUnfolder]: 1832/2955 cut-off events. [2022-12-13 13:10:52,560 INFO L131 PetriNetUnfolder]: For 1633/1633 co-relation queries the response was YES. [2022-12-13 13:10:52,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7436 conditions, 2955 events. 1832/2955 cut-off events. For 1633/1633 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16514 event pairs, 60 based on Foata normal form. 287/3161 useless extension candidates. Maximal degree in co-relation 7423. Up to 1778 conditions per place. [2022-12-13 13:10:52,571 INFO L137 encePairwiseOnDemand]: 422/425 looper letters, 50 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2022-12-13 13:10:52,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 289 flow [2022-12-13 13:10:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:10:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:10:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1203 transitions. [2022-12-13 13:10:52,574 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4717647058823529 [2022-12-13 13:10:52,574 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1203 transitions. [2022-12-13 13:10:52,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1203 transitions. [2022-12-13 13:10:52,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:10:52,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1203 transitions. [2022-12-13 13:10:52,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 200.5) internal successors, (1203), 6 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:52,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:52,580 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:52,580 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 350 flow. Second operand 6 states and 1203 transitions. [2022-12-13 13:10:52,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 289 flow [2022-12-13 13:10:52,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 281 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 13:10:52,583 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 101 flow [2022-12-13 13:10:52,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2022-12-13 13:10:52,583 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -47 predicate places. [2022-12-13 13:10:52,584 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 101 flow [2022-12-13 13:10:52,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 193.85714285714286) internal successors, (1357), 7 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:52,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:52,584 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 13:10:52,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:10:52,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3256fb-dca5-49b2-a62d-dd457cf00838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:10:52,786 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:10:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:52,787 INFO L85 PathProgramCache]: Analyzing trace with hash 299178622, now seen corresponding path program 1 times [2022-12-13 13:10:52,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:52,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887033981] [2022-12-13 13:10:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:52,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:10:52,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:10:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:10:52,852 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:10:52,852 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:10:52,852 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 13:10:52,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 13:10:52,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 13:10:52,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 13:10:52,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 13:10:52,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 13:10:52,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:10:52,853 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 13:10:52,854 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:10:52,854 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 13:10:52,882 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 13:10:52,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 293 transitions, 630 flow [2022-12-13 13:10:52,993 INFO L130 PetriNetUnfolder]: 127/734 cut-off events. [2022-12-13 13:10:52,993 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 13:10:52,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 734 events. 127/734 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3189 event pairs, 6 based on Foata normal form. 0/598 useless extension candidates. Maximal degree in co-relation 521. Up to 32 conditions per place. [2022-12-13 13:10:52,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 247 places, 293 transitions, 630 flow [2022-12-13 13:10:53,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 293 transitions, 630 flow [2022-12-13 13:10:53,003 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:10:53,003 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 293 transitions, 630 flow [2022-12-13 13:10:53,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 293 transitions, 630 flow [2022-12-13 13:10:53,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 293 transitions, 630 flow [2022-12-13 13:10:53,094 INFO L130 PetriNetUnfolder]: 127/734 cut-off events. [2022-12-13 13:10:53,095 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 13:10:53,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 734 events. 127/734 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3189 event pairs, 6 based on Foata normal form. 0/598 useless extension candidates. Maximal degree in co-relation 521. Up to 32 conditions per place. [2022-12-13 13:10:53,122 INFO L119 LiptonReduction]: Number of co-enabled transitions 53768 [2022-12-13 13:10:55,741 INFO L134 LiptonReduction]: Checked pairs total: 164208 [2022-12-13 13:10:55,741 INFO L136 LiptonReduction]: Total number of compositions: 211 [2022-12-13 13:10:55,742 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:10:55,742 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;@77556c07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:10:55,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 13:10:55,744 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2022-12-13 13:10:55,744 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:10:55,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:55,744 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:10:55,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:10:55,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1885974659, now seen corresponding path program 1 times [2022-12-13 13:10:55,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:55,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264199395] [2022-12-13 13:10:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:55,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:55,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:55,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264199395] [2022-12-13 13:10:55,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264199395] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:55,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:55,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:10:55,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455873360] [2022-12-13 13:10:55,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:55,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:10:55,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:10:55,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:10:55,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 504 [2022-12-13 13:10:55,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 150 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:55,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:10:55,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 504 [2022-12-13 13:10:55,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand