./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/13_unverif.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/13_unverif.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ --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 ea403ebfe777a86c8f08ec54b02dc30e546c8fae743fed5fb0e88129df40ac76 --- 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-dbf71c6-m [2022-10-17 10:24:55,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:24:55,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:24:56,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:24:56,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:24:56,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:24:56,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:24:56,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:24:56,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:24:56,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:24:56,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:24:56,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:24:56,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:24:56,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:24:56,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:24:56,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:24:56,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:24:56,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:24:56,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:24:56,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:24:56,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:24:56,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:24:56,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:24:56,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:24:56,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:24:56,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:24:56,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:24:56,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:24:56,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:24:56,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:24:56,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:24:56,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:24:56,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:24:56,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:24:56,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:24:56,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:24:56,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:24:56,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:24:56,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:24:56,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:24:56,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:24:56,093 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:24:56,140 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:24:56,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:24:56,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:24:56,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:24:56,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:24:56,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:24:56,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:24:56,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:24:56,143 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:24:56,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:24:56,144 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:24:56,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:24:56,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:24:56,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:24:56,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:24:56,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:24:56,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:24:56,146 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:24:56,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:24:56,146 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:24:56,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:24:56,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:24:56,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:24:56,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:24:56,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:24:56,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:24:56,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:24:56,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:24:56,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:24:56,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:24:56,154 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:24:56,154 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:24:56,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:24:56,155 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea403ebfe777a86c8f08ec54b02dc30e546c8fae743fed5fb0e88129df40ac76 [2022-10-17 10:24:56,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:24:56,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:24:56,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:24:56,455 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:24:56,456 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:24:56,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread-ext/13_unverif.i [2022-10-17 10:24:56,533 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/data/e97811b3a/99fbe3bdbc0840ffbb47bb8fcf411bf3/FLAG7dbb6eef1 [2022-10-17 10:24:57,114 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:24:57,114 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/sv-benchmarks/c/pthread-ext/13_unverif.i [2022-10-17 10:24:57,128 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/data/e97811b3a/99fbe3bdbc0840ffbb47bb8fcf411bf3/FLAG7dbb6eef1 [2022-10-17 10:24:57,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/data/e97811b3a/99fbe3bdbc0840ffbb47bb8fcf411bf3 [2022-10-17 10:24:57,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:24:57,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:24:57,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:24:57,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:24:57,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:24:57,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:24:57" (1/1) ... [2022-10-17 10:24:57,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6acfc917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:57, skipping insertion in model container [2022-10-17 10:24:57,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:24:57" (1/1) ... [2022-10-17 10:24:57,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:24:57,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:24:57,942 WARN L230 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_caaf2665-e46d-4aee-a0c6-5089f82de8fd/sv-benchmarks/c/pthread-ext/13_unverif.i[30213,30226] [2022-10-17 10:24:57,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:24:57,971 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:24:58,027 WARN L230 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_caaf2665-e46d-4aee-a0c6-5089f82de8fd/sv-benchmarks/c/pthread-ext/13_unverif.i[30213,30226] [2022-10-17 10:24:58,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:24:58,083 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:24:58,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58 WrapperNode [2022-10-17 10:24:58,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:24:58,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:24:58,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:24:58,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:24:58,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (1/1) ... [2022-10-17 10:24:58,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (1/1) ... [2022-10-17 10:24:58,151 INFO L138 Inliner]: procedures = 168, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2022-10-17 10:24:58,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:24:58,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:24:58,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:24:58,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:24:58,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (1/1) ... [2022-10-17 10:24:58,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (1/1) ... [2022-10-17 10:24:58,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (1/1) ... [2022-10-17 10:24:58,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (1/1) ... [2022-10-17 10:24:58,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (1/1) ... [2022-10-17 10:24:58,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (1/1) ... [2022-10-17 10:24:58,181 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (1/1) ... [2022-10-17 10:24:58,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (1/1) ... [2022-10-17 10:24:58,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:24:58,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:24:58,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:24:58,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:24:58,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (1/1) ... [2022-10-17 10:24:58,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:24:58,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:58,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:24:58,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caaf2665-e46d-4aee-a0c6-5089f82de8fd/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:24:58,275 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-10-17 10:24:58,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-10-17 10:24:58,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:24:58,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:24:58,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:24:58,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:24:58,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:24:58,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:24:58,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:24:58,278 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:24:58,409 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:24:58,411 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:24:58,615 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:24:58,675 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:24:58,678 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:24:58,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:24:58 BoogieIcfgContainer [2022-10-17 10:24:58,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:24:58,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:24:58,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:24:58,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:24:58,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:24:57" (1/3) ... [2022-10-17 10:24:58,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5936a9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:24:58, skipping insertion in model container [2022-10-17 10:24:58,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:58" (2/3) ... [2022-10-17 10:24:58,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5936a9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:24:58, skipping insertion in model container [2022-10-17 10:24:58,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:24:58" (3/3) ... [2022-10-17 10:24:58,702 INFO L112 eAbstractionObserver]: Analyzing ICFG 13_unverif.i [2022-10-17 10:24:58,712 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:24:58,722 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:24:58,722 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:24:58,723 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:24:58,766 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:24:58,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 44 transitions, 93 flow [2022-10-17 10:24:58,840 INFO L130 PetriNetUnfolder]: 4/55 cut-off events. [2022-10-17 10:24:58,840 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:24:58,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 55 events. 4/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 27. Up to 4 conditions per place. [2022-10-17 10:24:58,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 44 transitions, 93 flow [2022-10-17 10:24:58,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 44 transitions, 93 flow [2022-10-17 10:24:58,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:24:58,873 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;@27bb515a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:24:58,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 10:24:58,891 INFO L130 PetriNetUnfolder]: 3/48 cut-off events. [2022-10-17 10:24:58,891 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:24:58,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:24:58,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:58,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:58,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:58,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1709671825, now seen corresponding path program 1 times [2022-10-17 10:24:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:58,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566274337] [2022-10-17 10:24:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:58,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:24:59,057 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:24:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:24:59,108 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:24:59,110 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:24:59,112 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-10-17 10:24:59,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-10-17 10:24:59,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-10-17 10:24:59,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:24:59,116 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-10-17 10:24:59,121 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:24:59,121 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 10:24:59,152 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:24:59,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 59 transitions, 130 flow [2022-10-17 10:24:59,184 INFO L130 PetriNetUnfolder]: 7/83 cut-off events. [2022-10-17 10:24:59,184 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:24:59,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 83 events. 7/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 151 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 56. Up to 6 conditions per place. [2022-10-17 10:24:59,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 59 transitions, 130 flow [2022-10-17 10:24:59,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 59 transitions, 130 flow [2022-10-17 10:24:59,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:24:59,193 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;@27bb515a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:24:59,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 10:24:59,213 INFO L130 PetriNetUnfolder]: 3/54 cut-off events. [2022-10-17 10:24:59,214 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:24:59,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:24:59,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:59,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 10:24:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:59,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1240991835, now seen corresponding path program 1 times [2022-10-17 10:24:59,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:59,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164825109] [2022-10-17 10:24:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:59,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:59,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:59,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164825109] [2022-10-17 10:24:59,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164825109] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:59,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:59,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:24:59,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978475019] [2022-10-17 10:24:59,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:59,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:24:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:24:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:24:59,963 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 59 [2022-10-17 10:24:59,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 130 flow. Second operand has 6 states, 6 states have (on average 41.166666666666664) internal successors, (247), 6 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:24:59,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:24:59,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 59 [2022-10-17 10:24:59,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:00,156 INFO L130 PetriNetUnfolder]: 55/201 cut-off events. [2022-10-17 10:25:00,156 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-10-17 10:25:00,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 201 events. 55/201 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 849 event pairs, 8 based on Foata normal form. 68/243 useless extension candidates. Maximal degree in co-relation 165. Up to 73 conditions per place. [2022-10-17 10:25:00,161 INFO L137 encePairwiseOnDemand]: 49/59 looper letters, 25 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2022-10-17 10:25:00,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 242 flow [2022-10-17 10:25:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:25:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:25:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 289 transitions. [2022-10-17 10:25:00,179 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8163841807909604 [2022-10-17 10:25:00,180 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 289 transitions. [2022-10-17 10:25:00,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 289 transitions. [2022-10-17 10:25:00,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:00,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 289 transitions. [2022-10-17 10:25:00,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 48.166666666666664) internal successors, (289), 6 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:00,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:00,198 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:00,200 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 130 flow. Second operand 6 states and 289 transitions. [2022-10-17 10:25:00,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 242 flow [2022-10-17 10:25:00,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 240 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-10-17 10:25:00,209 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 165 flow [2022-10-17 10:25:00,211 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=165, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2022-10-17 10:25:00,215 INFO L287 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2022-10-17 10:25:00,216 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 165 flow [2022-10-17 10:25:00,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.166666666666664) internal successors, (247), 6 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:00,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:00,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:00,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:25:00,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 10:25:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash 691681847, now seen corresponding path program 1 times [2022-10-17 10:25:00,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:00,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764499739] [2022-10-17 10:25:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:00,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:25:00,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:00,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764499739] [2022-10-17 10:25:00,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764499739] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:00,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:00,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:25:00,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362382475] [2022-10-17 10:25:00,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:00,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:25:00,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:00,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:25:00,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:25:00,481 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 59 [2022-10-17 10:25:00,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 165 flow. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:00,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:00,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 59 [2022-10-17 10:25:00,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:00,694 INFO L130 PetriNetUnfolder]: 67/219 cut-off events. [2022-10-17 10:25:00,694 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-10-17 10:25:00,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 219 events. 67/219 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 884 event pairs, 19 based on Foata normal form. 9/203 useless extension candidates. Maximal degree in co-relation 366. Up to 83 conditions per place. [2022-10-17 10:25:00,704 INFO L137 encePairwiseOnDemand]: 54/59 looper letters, 30 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2022-10-17 10:25:00,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 73 transitions, 298 flow [2022-10-17 10:25:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:25:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:25:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2022-10-17 10:25:00,710 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8050847457627118 [2022-10-17 10:25:00,710 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 190 transitions. [2022-10-17 10:25:00,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 190 transitions. [2022-10-17 10:25:00,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:00,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 190 transitions. [2022-10-17 10:25:00,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:00,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:00,716 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:00,717 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 165 flow. Second operand 4 states and 190 transitions. [2022-10-17 10:25:00,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 73 transitions, 298 flow [2022-10-17 10:25:00,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:25:00,724 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 238 flow [2022-10-17 10:25:00,725 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2022-10-17 10:25:00,726 INFO L287 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2022-10-17 10:25:00,727 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 238 flow [2022-10-17 10:25:00,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:00,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:00,728 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:00,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:25:00,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 10:25:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:00,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1316932227, now seen corresponding path program 1 times [2022-10-17 10:25:00,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:00,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305252009] [2022-10-17 10:25:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:00,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:25:00,761 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:25:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:25:00,797 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:25:00,797 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:25:00,797 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-10-17 10:25:00,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-10-17 10:25:00,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-10-17 10:25:00,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-10-17 10:25:00,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:25:00,800 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-10-17 10:25:00,802 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:25:00,802 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-10-17 10:25:00,834 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:25:00,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 74 transitions, 169 flow [2022-10-17 10:25:00,872 INFO L130 PetriNetUnfolder]: 10/111 cut-off events. [2022-10-17 10:25:00,872 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-10-17 10:25:00,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 111 events. 10/111 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 222 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 87. Up to 8 conditions per place. [2022-10-17 10:25:00,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 74 transitions, 169 flow [2022-10-17 10:25:00,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 74 transitions, 169 flow [2022-10-17 10:25:00,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:25:00,881 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;@27bb515a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:25:00,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-10-17 10:25:00,887 INFO L130 PetriNetUnfolder]: 3/51 cut-off events. [2022-10-17 10:25:00,887 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:25:00,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:00,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:00,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:25:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash 361438003, now seen corresponding path program 1 times [2022-10-17 10:25:00,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:00,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910262743] [2022-10-17 10:25:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:00,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:25:01,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:01,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910262743] [2022-10-17 10:25:01,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910262743] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:01,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:01,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:25:01,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822015439] [2022-10-17 10:25:01,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:01,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:25:01,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:25:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:25:01,135 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2022-10-17 10:25:01,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 169 flow. Second operand has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:01,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:01,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2022-10-17 10:25:01,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:01,497 INFO L130 PetriNetUnfolder]: 464/1197 cut-off events. [2022-10-17 10:25:01,497 INFO L131 PetriNetUnfolder]: For 355/355 co-relation queries the response was YES. [2022-10-17 10:25:01,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 1197 events. 464/1197 cut-off events. For 355/355 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8177 event pairs, 121 based on Foata normal form. 341/1366 useless extension candidates. Maximal degree in co-relation 520. Up to 553 conditions per place. [2022-10-17 10:25:01,514 INFO L137 encePairwiseOnDemand]: 62/74 looper letters, 40 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2022-10-17 10:25:01,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 371 flow [2022-10-17 10:25:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:25:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:25:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 358 transitions. [2022-10-17 10:25:01,521 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8063063063063063 [2022-10-17 10:25:01,521 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 358 transitions. [2022-10-17 10:25:01,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 358 transitions. [2022-10-17 10:25:01,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:01,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 358 transitions. [2022-10-17 10:25:01,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:01,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:01,533 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:01,533 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 169 flow. Second operand 6 states and 358 transitions. [2022-10-17 10:25:01,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 371 flow [2022-10-17 10:25:01,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 97 transitions, 357 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-10-17 10:25:01,541 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 218 flow [2022-10-17 10:25:01,541 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2022-10-17 10:25:01,544 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2022-10-17 10:25:01,544 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 218 flow [2022-10-17 10:25:01,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:01,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:01,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:01,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:25:01,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:25:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:01,546 INFO L85 PathProgramCache]: Analyzing trace with hash 117564147, now seen corresponding path program 1 times [2022-10-17 10:25:01,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:01,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773423866] [2022-10-17 10:25:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:01,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:25:01,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:01,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773423866] [2022-10-17 10:25:01,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773423866] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:01,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:01,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:25:01,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205161456] [2022-10-17 10:25:01,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:25:01,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:25:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:25:01,782 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2022-10-17 10:25:01,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 4 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:01,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:01,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2022-10-17 10:25:01,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:02,172 INFO L130 PetriNetUnfolder]: 742/1473 cut-off events. [2022-10-17 10:25:02,172 INFO L131 PetriNetUnfolder]: For 565/565 co-relation queries the response was YES. [2022-10-17 10:25:02,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 1473 events. 742/1473 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9161 event pairs, 222 based on Foata normal form. 55/1333 useless extension candidates. Maximal degree in co-relation 3313. Up to 709 conditions per place. [2022-10-17 10:25:02,194 INFO L137 encePairwiseOnDemand]: 68/74 looper letters, 47 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2022-10-17 10:25:02,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 101 transitions, 430 flow [2022-10-17 10:25:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:25:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:25:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2022-10-17 10:25:02,196 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8006756756756757 [2022-10-17 10:25:02,196 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 237 transitions. [2022-10-17 10:25:02,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 237 transitions. [2022-10-17 10:25:02,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:02,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 237 transitions. [2022-10-17 10:25:02,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:02,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:02,200 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:02,200 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 218 flow. Second operand 4 states and 237 transitions. [2022-10-17 10:25:02,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 101 transitions, 430 flow [2022-10-17 10:25:02,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 430 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:25:02,205 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 320 flow [2022-10-17 10:25:02,206 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2022-10-17 10:25:02,206 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-10-17 10:25:02,207 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 320 flow [2022-10-17 10:25:02,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 4 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:02,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:02,207 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:02,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:25:02,208 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:25:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1179531454, now seen corresponding path program 1 times [2022-10-17 10:25:02,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:02,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692152653] [2022-10-17 10:25:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:02,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:25:02,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:02,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692152653] [2022-10-17 10:25:02,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692152653] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:02,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:02,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:25:02,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266276829] [2022-10-17 10:25:02,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:02,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:25:02,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:02,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:25:02,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:25:02,460 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2022-10-17 10:25:02,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 320 flow. Second operand has 6 states, 6 states have (on average 49.333333333333336) internal successors, (296), 6 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:02,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:02,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2022-10-17 10:25:02,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:02,979 INFO L130 PetriNetUnfolder]: 980/2087 cut-off events. [2022-10-17 10:25:02,979 INFO L131 PetriNetUnfolder]: For 2170/2198 co-relation queries the response was YES. [2022-10-17 10:25:02,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5495 conditions, 2087 events. 980/2087 cut-off events. For 2170/2198 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14533 event pairs, 270 based on Foata normal form. 28/1860 useless extension candidates. Maximal degree in co-relation 5387. Up to 1297 conditions per place. [2022-10-17 10:25:03,013 INFO L137 encePairwiseOnDemand]: 67/74 looper letters, 51 selfloop transitions, 28 changer transitions 0/125 dead transitions. [2022-10-17 10:25:03,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 125 transitions, 671 flow [2022-10-17 10:25:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:25:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:25:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 339 transitions. [2022-10-17 10:25:03,016 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7635135135135135 [2022-10-17 10:25:03,016 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 339 transitions. [2022-10-17 10:25:03,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 339 transitions. [2022-10-17 10:25:03,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:03,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 339 transitions. [2022-10-17 10:25:03,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:03,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:03,020 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:03,021 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 320 flow. Second operand 6 states and 339 transitions. [2022-10-17 10:25:03,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 125 transitions, 671 flow [2022-10-17 10:25:03,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 125 transitions, 663 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-10-17 10:25:03,031 INFO L231 Difference]: Finished difference. Result has 87 places, 106 transitions, 551 flow [2022-10-17 10:25:03,031 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=551, PETRI_PLACES=87, PETRI_TRANSITIONS=106} [2022-10-17 10:25:03,033 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 13 predicate places. [2022-10-17 10:25:03,034 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 106 transitions, 551 flow [2022-10-17 10:25:03,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.333333333333336) internal successors, (296), 6 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:03,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:03,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:03,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:25:03,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:25:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1999828010, now seen corresponding path program 1 times [2022-10-17 10:25:03,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:03,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978002813] [2022-10-17 10:25:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:03,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:25:03,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:03,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978002813] [2022-10-17 10:25:03,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978002813] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:03,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:03,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:25:03,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488134714] [2022-10-17 10:25:03,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:03,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:25:03,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:03,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:25:03,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:25:03,227 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2022-10-17 10:25:03,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 106 transitions, 551 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:03,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:03,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2022-10-17 10:25:03,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:04,000 INFO L130 PetriNetUnfolder]: 1478/2863 cut-off events. [2022-10-17 10:25:04,000 INFO L131 PetriNetUnfolder]: For 4306/4343 co-relation queries the response was YES. [2022-10-17 10:25:04,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8840 conditions, 2863 events. 1478/2863 cut-off events. For 4306/4343 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 19722 event pairs, 438 based on Foata normal form. 145/2770 useless extension candidates. Maximal degree in co-relation 8725. Up to 1406 conditions per place. [2022-10-17 10:25:04,066 INFO L137 encePairwiseOnDemand]: 68/74 looper letters, 75 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2022-10-17 10:25:04,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 147 transitions, 995 flow [2022-10-17 10:25:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:25:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:25:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 235 transitions. [2022-10-17 10:25:04,069 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.793918918918919 [2022-10-17 10:25:04,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 235 transitions. [2022-10-17 10:25:04,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 235 transitions. [2022-10-17 10:25:04,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:04,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 235 transitions. [2022-10-17 10:25:04,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:04,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:04,073 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:04,073 INFO L175 Difference]: Start difference. First operand has 87 places, 106 transitions, 551 flow. Second operand 4 states and 235 transitions. [2022-10-17 10:25:04,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 147 transitions, 995 flow [2022-10-17 10:25:04,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 147 transitions, 985 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-10-17 10:25:04,099 INFO L231 Difference]: Finished difference. Result has 93 places, 130 transitions, 851 flow [2022-10-17 10:25:04,100 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=851, PETRI_PLACES=93, PETRI_TRANSITIONS=130} [2022-10-17 10:25:04,101 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2022-10-17 10:25:04,101 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 130 transitions, 851 flow [2022-10-17 10:25:04,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:04,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:04,102 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:04,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:25:04,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:25:04,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:04,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1107980303, now seen corresponding path program 1 times [2022-10-17 10:25:04,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:04,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161114904] [2022-10-17 10:25:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:04,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:25:04,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:04,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161114904] [2022-10-17 10:25:04,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161114904] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:04,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:04,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:25:04,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204502510] [2022-10-17 10:25:04,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:04,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:25:04,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:04,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:25:04,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:25:04,243 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 74 [2022-10-17 10:25:04,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 130 transitions, 851 flow. Second operand has 5 states, 5 states have (on average 54.4) internal successors, (272), 5 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:04,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:04,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 74 [2022-10-17 10:25:04,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:04,396 INFO L130 PetriNetUnfolder]: 87/419 cut-off events. [2022-10-17 10:25:04,396 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2022-10-17 10:25:04,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 419 events. 87/419 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2770 event pairs, 28 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 815. Up to 156 conditions per place. [2022-10-17 10:25:04,403 INFO L137 encePairwiseOnDemand]: 64/74 looper letters, 15 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2022-10-17 10:25:04,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 428 flow [2022-10-17 10:25:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:25:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:25:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 293 transitions. [2022-10-17 10:25:04,406 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7918918918918919 [2022-10-17 10:25:04,406 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 293 transitions. [2022-10-17 10:25:04,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 293 transitions. [2022-10-17 10:25:04,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:04,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 293 transitions. [2022-10-17 10:25:04,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:04,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:04,410 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:04,410 INFO L175 Difference]: Start difference. First operand has 93 places, 130 transitions, 851 flow. Second operand 5 states and 293 transitions. [2022-10-17 10:25:04,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 428 flow [2022-10-17 10:25:04,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 87 transitions, 379 flow, removed 8 selfloop flow, removed 7 redundant places. [2022-10-17 10:25:04,417 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 355 flow [2022-10-17 10:25:04,417 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-10-17 10:25:04,419 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-10-17 10:25:04,419 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 355 flow [2022-10-17 10:25:04,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.4) internal successors, (272), 5 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:04,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:04,420 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:04,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:25:04,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:25:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1387387467, now seen corresponding path program 1 times [2022-10-17 10:25:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:04,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725598417] [2022-10-17 10:25:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:04,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:25:04,441 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:25:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:25:04,456 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:25:04,457 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:25:04,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-10-17 10:25:04,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-10-17 10:25:04,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-10-17 10:25:04,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-10-17 10:25:04,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-10-17 10:25:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:25:04,459 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-10-17 10:25:04,460 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:25:04,460 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-10-17 10:25:04,502 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:25:04,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 89 transitions, 210 flow [2022-10-17 10:25:04,552 INFO L130 PetriNetUnfolder]: 13/139 cut-off events. [2022-10-17 10:25:04,553 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-10-17 10:25:04,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 139 events. 13/139 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 293 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 119. Up to 10 conditions per place. [2022-10-17 10:25:04,554 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 89 transitions, 210 flow [2022-10-17 10:25:04,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 89 transitions, 210 flow [2022-10-17 10:25:04,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:25:04,563 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;@27bb515a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:25:04,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-17 10:25:04,568 INFO L130 PetriNetUnfolder]: 3/53 cut-off events. [2022-10-17 10:25:04,569 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:25:04,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:04,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:04,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 10:25:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:04,570 INFO L85 PathProgramCache]: Analyzing trace with hash 894277633, now seen corresponding path program 1 times [2022-10-17 10:25:04,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:04,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860183848] [2022-10-17 10:25:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:04,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:25:04,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:04,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860183848] [2022-10-17 10:25:04,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860183848] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:04,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:04,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:25:04,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738774080] [2022-10-17 10:25:04,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:04,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:25:04,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:04,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:25:04,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:25:04,816 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-10-17 10:25:04,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:04,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:04,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-10-17 10:25:04,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:06,006 INFO L130 PetriNetUnfolder]: 3217/6028 cut-off events. [2022-10-17 10:25:06,006 INFO L131 PetriNetUnfolder]: For 2395/2395 co-relation queries the response was YES. [2022-10-17 10:25:06,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11639 conditions, 6028 events. 3217/6028 cut-off events. For 2395/2395 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 44601 event pairs, 1068 based on Foata normal form. 1820/6773 useless extension candidates. Maximal degree in co-relation 2074. Up to 3830 conditions per place. [2022-10-17 10:25:06,098 INFO L137 encePairwiseOnDemand]: 75/89 looper letters, 55 selfloop transitions, 18 changer transitions 0/124 dead transitions. [2022-10-17 10:25:06,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 124 transitions, 510 flow [2022-10-17 10:25:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:25:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:25:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2022-10-17 10:25:06,102 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.799625468164794 [2022-10-17 10:25:06,103 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 427 transitions. [2022-10-17 10:25:06,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 427 transitions. [2022-10-17 10:25:06,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:06,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 427 transitions. [2022-10-17 10:25:06,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 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) [2022-10-17 10:25:06,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:06,108 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:06,109 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 210 flow. Second operand 6 states and 427 transitions. [2022-10-17 10:25:06,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 124 transitions, 510 flow [2022-10-17 10:25:06,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 124 transitions, 474 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-10-17 10:25:06,115 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 271 flow [2022-10-17 10:25:06,115 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2022-10-17 10:25:06,117 INFO L287 CegarLoopForPetriNet]: 89 programPoint places, -2 predicate places. [2022-10-17 10:25:06,118 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 271 flow [2022-10-17 10:25:06,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:06,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:06,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:06,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 10:25:06,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 10:25:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:06,120 INFO L85 PathProgramCache]: Analyzing trace with hash -256042260, now seen corresponding path program 1 times [2022-10-17 10:25:06,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:06,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667618407] [2022-10-17 10:25:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:06,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:25:06,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:06,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667618407] [2022-10-17 10:25:06,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667618407] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:06,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:06,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:25:06,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251040554] [2022-10-17 10:25:06,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:06,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:25:06,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:06,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:25:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:25:06,298 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-10-17 10:25:06,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 91 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:06,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:06,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-10-17 10:25:06,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:08,005 INFO L130 PetriNetUnfolder]: 5680/9273 cut-off events. [2022-10-17 10:25:08,005 INFO L131 PetriNetUnfolder]: For 3502/3502 co-relation queries the response was YES. [2022-10-17 10:25:08,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21837 conditions, 9273 events. 5680/9273 cut-off events. For 3502/3502 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 65932 event pairs, 1693 based on Foata normal form. 297/8235 useless extension candidates. Maximal degree in co-relation 21720. Up to 4829 conditions per place. [2022-10-17 10:25:08,174 INFO L137 encePairwiseOnDemand]: 82/89 looper letters, 64 selfloop transitions, 14 changer transitions 0/129 dead transitions. [2022-10-17 10:25:08,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 129 transitions, 562 flow [2022-10-17 10:25:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:25:08,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:25:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 284 transitions. [2022-10-17 10:25:08,177 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.797752808988764 [2022-10-17 10:25:08,177 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 284 transitions. [2022-10-17 10:25:08,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 284 transitions. [2022-10-17 10:25:08,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:08,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 284 transitions. [2022-10-17 10:25:08,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:08,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:08,182 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:08,182 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 271 flow. Second operand 4 states and 284 transitions. [2022-10-17 10:25:08,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 129 transitions, 562 flow [2022-10-17 10:25:08,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 129 transitions, 562 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:25:08,196 INFO L231 Difference]: Finished difference. Result has 93 places, 104 transitions, 402 flow [2022-10-17 10:25:08,197 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=402, PETRI_PLACES=93, PETRI_TRANSITIONS=104} [2022-10-17 10:25:08,198 INFO L287 CegarLoopForPetriNet]: 89 programPoint places, 4 predicate places. [2022-10-17 10:25:08,198 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 104 transitions, 402 flow [2022-10-17 10:25:08,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:08,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:08,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:08,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:25:08,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 10:25:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:08,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1275921609, now seen corresponding path program 1 times [2022-10-17 10:25:08,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:08,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093670382] [2022-10-17 10:25:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:08,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:25:08,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:08,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093670382] [2022-10-17 10:25:08,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093670382] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:08,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:08,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:25:08,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384735698] [2022-10-17 10:25:08,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:08,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:25:08,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:08,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:25:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:25:08,501 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-10-17 10:25:08,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 104 transitions, 402 flow. Second operand has 6 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:08,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:08,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-10-17 10:25:08,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:10,756 INFO L130 PetriNetUnfolder]: 7598/13215 cut-off events. [2022-10-17 10:25:10,757 INFO L131 PetriNetUnfolder]: For 14094/14175 co-relation queries the response was YES. [2022-10-17 10:25:10,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36097 conditions, 13215 events. 7598/13215 cut-off events. For 14094/14175 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 105840 event pairs, 2335 based on Foata normal form. 81/11611 useless extension candidates. Maximal degree in co-relation 35988. Up to 9496 conditions per place. [2022-10-17 10:25:11,098 INFO L137 encePairwiseOnDemand]: 81/89 looper letters, 71 selfloop transitions, 38 changer transitions 0/163 dead transitions. [2022-10-17 10:25:11,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 163 transitions, 901 flow [2022-10-17 10:25:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:25:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:25:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 406 transitions. [2022-10-17 10:25:11,101 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7602996254681648 [2022-10-17 10:25:11,101 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 406 transitions. [2022-10-17 10:25:11,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 406 transitions. [2022-10-17 10:25:11,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:11,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 406 transitions. [2022-10-17 10:25:11,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.66666666666667) internal successors, (406), 6 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:11,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:11,107 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:11,107 INFO L175 Difference]: Start difference. First operand has 93 places, 104 transitions, 402 flow. Second operand 6 states and 406 transitions. [2022-10-17 10:25:11,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 163 transitions, 901 flow [2022-10-17 10:25:11,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 163 transitions, 891 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-10-17 10:25:11,138 INFO L231 Difference]: Finished difference. Result has 101 places, 134 transitions, 717 flow [2022-10-17 10:25:11,139 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=717, PETRI_PLACES=101, PETRI_TRANSITIONS=134} [2022-10-17 10:25:11,140 INFO L287 CegarLoopForPetriNet]: 89 programPoint places, 12 predicate places. [2022-10-17 10:25:11,140 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 134 transitions, 717 flow [2022-10-17 10:25:11,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:11,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:11,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:11,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 10:25:11,142 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 10:25:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash -518940092, now seen corresponding path program 1 times [2022-10-17 10:25:11,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:11,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288015370] [2022-10-17 10:25:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:11,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:25:11,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:11,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288015370] [2022-10-17 10:25:11,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288015370] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:11,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:11,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:25:11,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469199075] [2022-10-17 10:25:11,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:11,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:25:11,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:11,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:25:11,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:25:11,296 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-10-17 10:25:11,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 134 transitions, 717 flow. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:11,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:11,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-10-17 10:25:11,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:14,309 INFO L130 PetriNetUnfolder]: 12548/20172 cut-off events. [2022-10-17 10:25:14,309 INFO L131 PetriNetUnfolder]: For 30780/30943 co-relation queries the response was YES. [2022-10-17 10:25:14,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62461 conditions, 20172 events. 12548/20172 cut-off events. For 30780/30943 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 156386 event pairs, 3752 based on Foata normal form. 772/18791 useless extension candidates. Maximal degree in co-relation 62345. Up to 10950 conditions per place. [2022-10-17 10:25:14,769 INFO L137 encePairwiseOnDemand]: 82/89 looper letters, 103 selfloop transitions, 34 changer transitions 0/191 dead transitions. [2022-10-17 10:25:14,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 191 transitions, 1320 flow [2022-10-17 10:25:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:25:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:25:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2022-10-17 10:25:14,772 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7921348314606742 [2022-10-17 10:25:14,772 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 282 transitions. [2022-10-17 10:25:14,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 282 transitions. [2022-10-17 10:25:14,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:14,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 282 transitions. [2022-10-17 10:25:14,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:14,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:14,775 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:14,775 INFO L175 Difference]: Start difference. First operand has 101 places, 134 transitions, 717 flow. Second operand 4 states and 282 transitions. [2022-10-17 10:25:14,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 191 transitions, 1320 flow [2022-10-17 10:25:14,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 191 transitions, 1306 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-10-17 10:25:14,857 INFO L231 Difference]: Finished difference. Result has 107 places, 166 transitions, 1116 flow [2022-10-17 10:25:14,857 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1116, PETRI_PLACES=107, PETRI_TRANSITIONS=166} [2022-10-17 10:25:14,858 INFO L287 CegarLoopForPetriNet]: 89 programPoint places, 18 predicate places. [2022-10-17 10:25:14,858 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 166 transitions, 1116 flow [2022-10-17 10:25:14,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:14,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:14,858 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:14,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 10:25:14,859 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 10:25:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:14,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1969730463, now seen corresponding path program 1 times [2022-10-17 10:25:14,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:14,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348298635] [2022-10-17 10:25:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:14,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:25:14,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:14,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348298635] [2022-10-17 10:25:14,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348298635] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:14,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:14,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:25:14,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286503950] [2022-10-17 10:25:14,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:14,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:25:14,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:25:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:25:14,966 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 89 [2022-10-17 10:25:14,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 166 transitions, 1116 flow. Second operand has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:14,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:14,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 89 [2022-10-17 10:25:14,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:15,267 INFO L130 PetriNetUnfolder]: 617/1730 cut-off events. [2022-10-17 10:25:15,267 INFO L131 PetriNetUnfolder]: For 572/572 co-relation queries the response was YES. [2022-10-17 10:25:15,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3488 conditions, 1730 events. 617/1730 cut-off events. For 572/572 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14285 event pairs, 302 based on Foata normal form. 0/1648 useless extension candidates. Maximal degree in co-relation 3390. Up to 1000 conditions per place. [2022-10-17 10:25:15,287 INFO L137 encePairwiseOnDemand]: 76/89 looper letters, 21 selfloop transitions, 9 changer transitions 0/111 dead transitions. [2022-10-17 10:25:15,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 111 transitions, 557 flow [2022-10-17 10:25:15,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:25:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:25:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 348 transitions. [2022-10-17 10:25:15,289 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7820224719101123 [2022-10-17 10:25:15,289 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 348 transitions. [2022-10-17 10:25:15,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 348 transitions. [2022-10-17 10:25:15,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:15,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 348 transitions. [2022-10-17 10:25:15,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.6) internal successors, (348), 5 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:15,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:15,293 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:15,293 INFO L175 Difference]: Start difference. First operand has 107 places, 166 transitions, 1116 flow. Second operand 5 states and 348 transitions. [2022-10-17 10:25:15,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 111 transitions, 557 flow [2022-10-17 10:25:15,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 111 transitions, 498 flow, removed 11 selfloop flow, removed 7 redundant places. [2022-10-17 10:25:15,300 INFO L231 Difference]: Finished difference. Result has 102 places, 106 transitions, 457 flow [2022-10-17 10:25:15,301 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=457, PETRI_PLACES=102, PETRI_TRANSITIONS=106} [2022-10-17 10:25:15,301 INFO L287 CegarLoopForPetriNet]: 89 programPoint places, 13 predicate places. [2022-10-17 10:25:15,302 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 106 transitions, 457 flow [2022-10-17 10:25:15,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:15,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:15,302 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:15,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 10:25:15,303 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 10:25:15,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:15,303 INFO L85 PathProgramCache]: Analyzing trace with hash -345034686, now seen corresponding path program 1 times [2022-10-17 10:25:15,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:15,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337098322] [2022-10-17 10:25:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:15,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-17 10:25:15,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:15,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337098322] [2022-10-17 10:25:15,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337098322] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:15,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:15,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:25:15,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912581538] [2022-10-17 10:25:15,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:15,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:25:15,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:15,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:25:15,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:25:15,488 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-10-17 10:25:15,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 106 transitions, 457 flow. Second operand has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:15,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:15,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-10-17 10:25:15,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:16,372 INFO L130 PetriNetUnfolder]: 2167/5516 cut-off events. [2022-10-17 10:25:16,373 INFO L131 PetriNetUnfolder]: For 4429/4459 co-relation queries the response was YES. [2022-10-17 10:25:16,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13751 conditions, 5516 events. 2167/5516 cut-off events. For 4429/4459 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 54889 event pairs, 879 based on Foata normal form. 2/5030 useless extension candidates. Maximal degree in co-relation 12402. Up to 1806 conditions per place. [2022-10-17 10:25:16,442 INFO L137 encePairwiseOnDemand]: 81/89 looper letters, 79 selfloop transitions, 35 changer transitions 0/167 dead transitions. [2022-10-17 10:25:16,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 167 transitions, 1026 flow [2022-10-17 10:25:16,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:25:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:25:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-10-17 10:25:16,445 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7415730337078652 [2022-10-17 10:25:16,445 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-10-17 10:25:16,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-10-17 10:25:16,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:16,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-10-17 10:25:16,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:16,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:16,450 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:16,450 INFO L175 Difference]: Start difference. First operand has 102 places, 106 transitions, 457 flow. Second operand 6 states and 396 transitions. [2022-10-17 10:25:16,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 167 transitions, 1026 flow [2022-10-17 10:25:16,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 167 transitions, 1025 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:25:16,458 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 714 flow [2022-10-17 10:25:16,459 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=714, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2022-10-17 10:25:16,460 INFO L287 CegarLoopForPetriNet]: 89 programPoint places, 20 predicate places. [2022-10-17 10:25:16,460 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 714 flow [2022-10-17 10:25:16,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:16,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:16,461 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:16,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-17 10:25:16,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 10:25:16,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:16,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1070488977, now seen corresponding path program 1 times [2022-10-17 10:25:16,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:16,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906400096] [2022-10-17 10:25:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:16,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-17 10:25:16,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:16,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906400096] [2022-10-17 10:25:16,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906400096] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:16,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:16,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:25:16,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623556947] [2022-10-17 10:25:16,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:16,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:25:16,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:16,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:25:16,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:25:16,622 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-10-17 10:25:16,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 714 flow. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:16,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:16,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-10-17 10:25:16,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:17,308 INFO L130 PetriNetUnfolder]: 2160/5567 cut-off events. [2022-10-17 10:25:17,308 INFO L131 PetriNetUnfolder]: For 6096/6096 co-relation queries the response was YES. [2022-10-17 10:25:17,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14635 conditions, 5567 events. 2160/5567 cut-off events. For 6096/6096 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 56605 event pairs, 1250 based on Foata normal form. 27/5142 useless extension candidates. Maximal degree in co-relation 14519. Up to 2336 conditions per place. [2022-10-17 10:25:17,382 INFO L137 encePairwiseOnDemand]: 85/89 looper letters, 79 selfloop transitions, 7 changer transitions 0/138 dead transitions. [2022-10-17 10:25:17,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 138 transitions, 956 flow [2022-10-17 10:25:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:25:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:25:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 256 transitions. [2022-10-17 10:25:17,385 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7191011235955056 [2022-10-17 10:25:17,385 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 256 transitions. [2022-10-17 10:25:17,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 256 transitions. [2022-10-17 10:25:17,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:17,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 256 transitions. [2022-10-17 10:25:17,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:17,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:17,388 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:17,388 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 714 flow. Second operand 4 states and 256 transitions. [2022-10-17 10:25:17,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 138 transitions, 956 flow [2022-10-17 10:25:17,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 138 transitions, 935 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:25:17,402 INFO L231 Difference]: Finished difference. Result has 110 places, 124 transitions, 706 flow [2022-10-17 10:25:17,402 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=706, PETRI_PLACES=110, PETRI_TRANSITIONS=124} [2022-10-17 10:25:17,403 INFO L287 CegarLoopForPetriNet]: 89 programPoint places, 21 predicate places. [2022-10-17 10:25:17,403 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 706 flow [2022-10-17 10:25:17,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:17,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:17,404 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:17,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-17 10:25:17,404 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 10:25:17,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:17,405 INFO L85 PathProgramCache]: Analyzing trace with hash 399352504, now seen corresponding path program 1 times [2022-10-17 10:25:17,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:17,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647904171] [2022-10-17 10:25:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:17,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:25:17,419 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:25:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:25:17,435 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:25:17,436 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:25:17,436 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-10-17 10:25:17,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-10-17 10:25:17,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-10-17 10:25:17,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-10-17 10:25:17,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-10-17 10:25:17,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-10-17 10:25:17,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-17 10:25:17,438 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:17,438 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:25:17,439 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-10-17 10:25:17,461 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:25:17,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 104 transitions, 253 flow [2022-10-17 10:25:17,484 INFO L130 PetriNetUnfolder]: 16/167 cut-off events. [2022-10-17 10:25:17,484 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-10-17 10:25:17,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 167 events. 16/167 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 367 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 152. Up to 12 conditions per place. [2022-10-17 10:25:17,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 104 transitions, 253 flow [2022-10-17 10:25:17,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 104 transitions, 253 flow [2022-10-17 10:25:17,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:25:17,489 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;@27bb515a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:25:17,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-10-17 10:25:17,494 INFO L130 PetriNetUnfolder]: 4/53 cut-off events. [2022-10-17 10:25:17,494 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:25:17,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:17,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:17,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-10-17 10:25:17,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:17,495 INFO L85 PathProgramCache]: Analyzing trace with hash 310982927, now seen corresponding path program 1 times [2022-10-17 10:25:17,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:17,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455885090] [2022-10-17 10:25:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:17,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:25:17,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:17,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455885090] [2022-10-17 10:25:17,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455885090] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:17,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:17,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:25:17,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787839618] [2022-10-17 10:25:17,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:17,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:25:17,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:17,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:25:17,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:25:17,654 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-10-17 10:25:17,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 65.16666666666667) internal successors, (391), 6 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:17,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:17,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-10-17 10:25:17,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:25:21,496 INFO L130 PetriNetUnfolder]: 20084/32390 cut-off events. [2022-10-17 10:25:21,496 INFO L131 PetriNetUnfolder]: For 16000/16000 co-relation queries the response was YES. [2022-10-17 10:25:21,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64373 conditions, 32390 events. 20084/32390 cut-off events. For 16000/16000 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 255908 event pairs, 7650 based on Foata normal form. 9560/36136 useless extension candidates. Maximal degree in co-relation 11483. Up to 23743 conditions per place. [2022-10-17 10:25:21,931 INFO L137 encePairwiseOnDemand]: 88/104 looper letters, 70 selfloop transitions, 22 changer transitions 0/151 dead transitions. [2022-10-17 10:25:21,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 151 transitions, 659 flow [2022-10-17 10:25:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:25:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:25:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 496 transitions. [2022-10-17 10:25:21,936 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2022-10-17 10:25:21,936 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 496 transitions. [2022-10-17 10:25:21,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 496 transitions. [2022-10-17 10:25:21,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:25:21,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 496 transitions. [2022-10-17 10:25:21,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:21,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:21,943 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:21,943 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 253 flow. Second operand 6 states and 496 transitions. [2022-10-17 10:25:21,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 151 transitions, 659 flow [2022-10-17 10:25:21,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 151 transitions, 591 flow, removed 34 selfloop flow, removed 0 redundant places. [2022-10-17 10:25:21,954 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 324 flow [2022-10-17 10:25:21,954 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2022-10-17 10:25:21,955 INFO L287 CegarLoopForPetriNet]: 104 programPoint places, -3 predicate places. [2022-10-17 10:25:21,955 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 324 flow [2022-10-17 10:25:21,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.16666666666667) internal successors, (391), 6 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:21,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:25:21,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:25:21,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-10-17 10:25:21,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-10-17 10:25:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:25:21,957 INFO L85 PathProgramCache]: Analyzing trace with hash 249140280, now seen corresponding path program 1 times [2022-10-17 10:25:21,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:25:21,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131484027] [2022-10-17 10:25:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:25:21,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:25:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:25:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:25:22,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:25:22,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131484027] [2022-10-17 10:25:22,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131484027] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:25:22,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:25:22,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:25:22,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732378530] [2022-10-17 10:25:22,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:25:22,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:25:22,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:25:22,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:25:22,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:25:22,115 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-10-17 10:25:22,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:25:22,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:25:22,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-10-17 10:25:22,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand