./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 44de34ccc7195f8ba562241ad79de4cb2add35f6ad2c59de465184820d6f6382 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:43:19,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:43:19,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:43:19,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:43:19,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:43:19,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:43:19,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:43:19,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:43:19,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:43:19,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:43:19,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:43:19,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:43:19,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:43:19,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:43:19,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:43:20,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:43:20,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:43:20,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:43:20,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:43:20,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:43:20,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:43:20,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:43:20,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:43:20,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:43:20,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:43:20,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:43:20,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:43:20,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:43:20,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:43:20,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:43:20,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:43:20,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:43:20,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:43:20,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:43:20,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:43:20,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:43:20,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:43:20,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:43:20,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:43:20,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:43:20,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:43:20,038 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:43:20,083 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:43:20,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:43:20,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:43:20,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:43:20,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:43:20,086 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:43:20,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:43:20,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:43:20,088 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:43:20,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:43:20,089 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:43:20,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:43:20,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:43:20,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:43:20,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:43:20,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:43:20,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:43:20,091 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:43:20,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:43:20,091 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:43:20,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:43:20,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:43:20,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:43:20,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:43:20,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:43:20,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:43:20,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:43:20,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:43:20,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:43:20,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:43:20,094 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:43:20,094 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:43:20,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:43:20,095 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_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44de34ccc7195f8ba562241ad79de4cb2add35f6ad2c59de465184820d6f6382 [2022-11-20 11:43:20,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:43:20,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:43:20,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:43:20,385 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:43:20,386 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:43:20,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i [2022-11-20 11:43:23,562 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:43:23,974 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:43:23,975 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i [2022-11-20 11:43:23,999 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/data/7b38e0c5c/57503da23376445eb04eea1c37a74808/FLAG69b685044 [2022-11-20 11:43:24,020 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/data/7b38e0c5c/57503da23376445eb04eea1c37a74808 [2022-11-20 11:43:24,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:43:24,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:43:24,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:43:24,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:43:24,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:43:24,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:43:24" (1/1) ... [2022-11-20 11:43:24,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd47a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:24, skipping insertion in model container [2022-11-20 11:43:24,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:43:24" (1/1) ... [2022-11-20 11:43:24,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:43:24,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:43:24,291 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i[818,831] [2022-11-20 11:43:24,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:43:24,834 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:43:24,851 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i[818,831] [2022-11-20 11:43:24,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:43:25,032 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:43:25,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25 WrapperNode [2022-11-20 11:43:25,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:43:25,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:43:25,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:43:25,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:43:25,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (1/1) ... [2022-11-20 11:43:25,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (1/1) ... [2022-11-20 11:43:25,123 INFO L138 Inliner]: procedures = 365, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-20 11:43:25,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:43:25,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:43:25,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:43:25,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:43:25,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (1/1) ... [2022-11-20 11:43:25,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (1/1) ... [2022-11-20 11:43:25,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (1/1) ... [2022-11-20 11:43:25,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (1/1) ... [2022-11-20 11:43:25,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (1/1) ... [2022-11-20 11:43:25,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (1/1) ... [2022-11-20 11:43:25,178 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (1/1) ... [2022-11-20 11:43:25,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (1/1) ... [2022-11-20 11:43:25,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:43:25,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:43:25,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:43:25,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:43:25,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (1/1) ... [2022-11-20 11:43:25,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:43:25,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:25,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:43:25,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:43:25,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:43:25,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:43:25,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:43:25,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:43:25,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:43:25,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2022-11-20 11:43:25,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2022-11-20 11:43:25,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:43:25,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:43:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:43:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:43:25,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:43:25,274 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:43:25,480 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:43:25,488 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:43:25,709 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:43:25,717 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:43:25,717 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 11:43:25,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:43:25 BoogieIcfgContainer [2022-11-20 11:43:25,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:43:25,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:43:25,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:43:25,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:43:25,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:43:24" (1/3) ... [2022-11-20 11:43:25,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62aeec0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:43:25, skipping insertion in model container [2022-11-20 11:43:25,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:25" (2/3) ... [2022-11-20 11:43:25,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62aeec0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:43:25, skipping insertion in model container [2022-11-20 11:43:25,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:43:25" (3/3) ... [2022-11-20 11:43:25,749 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-3.i [2022-11-20 11:43:25,760 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:43:25,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:43:25,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:43:25,773 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:43:25,832 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 11:43:25,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 91 transitions, 190 flow [2022-11-20 11:43:25,930 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-11-20 11:43:25,931 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:43:25,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 7/90 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-11-20 11:43:25,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 91 transitions, 190 flow [2022-11-20 11:43:25,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 78 transitions, 162 flow [2022-11-20 11:43:25,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:43:25,964 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;@26f36767, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:43:25,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:43:25,994 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-11-20 11:43:25,995 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:43:25,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:25,996 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:25,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1953118610, now seen corresponding path program 1 times [2022-11-20 11:43:26,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:26,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207300460] [2022-11-20 11:43:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:26,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:26,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:26,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207300460] [2022-11-20 11:43:26,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207300460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:26,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:26,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:26,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130713013] [2022-11-20 11:43:26,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:26,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:43:26,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:26,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:43:26,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:43:26,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 91 [2022-11-20 11:43:26,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:26,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 91 [2022-11-20 11:43:26,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:26,448 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-20 11:43:26,455 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 11:43:26,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 72 events. 2/72 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 4/73 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2022-11-20 11:43:26,459 INFO L137 encePairwiseOnDemand]: 87/91 looper letters, 2 selfloop transitions, 0 changer transitions 0/72 dead transitions. [2022-11-20 11:43:26,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 154 flow [2022-11-20 11:43:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:43:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:43:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 168 transitions. [2022-11-20 11:43:26,475 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9230769230769231 [2022-11-20 11:43:26,476 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 168 transitions. [2022-11-20 11:43:26,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 168 transitions. [2022-11-20 11:43:26,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:26,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 168 transitions. [2022-11-20 11:43:26,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 84.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,489 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,492 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 162 flow. Second operand 2 states and 168 transitions. [2022-11-20 11:43:26,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 154 flow [2022-11-20 11:43:26,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:43:26,500 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 146 flow [2022-11-20 11:43:26,502 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2022-11-20 11:43:26,507 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2022-11-20 11:43:26,507 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 146 flow [2022-11-20 11:43:26,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:26,508 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:26,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:43:26,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash -426756140, now seen corresponding path program 1 times [2022-11-20 11:43:26,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:26,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367901246] [2022-11-20 11:43:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:26,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:26,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:26,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367901246] [2022-11-20 11:43:26,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367901246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:26,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:26,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:26,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220323850] [2022-11-20 11:43:26,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:26,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:43:26,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:26,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:43:26,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:26,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 91 [2022-11-20 11:43:26,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:26,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 91 [2022-11-20 11:43:26,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:26,815 INFO L130 PetriNetUnfolder]: 2/79 cut-off events. [2022-11-20 11:43:26,819 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:43:26,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 79 events. 2/79 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 58 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 91. Up to 9 conditions per place. [2022-11-20 11:43:26,824 INFO L137 encePairwiseOnDemand]: 88/91 looper letters, 9 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2022-11-20 11:43:26,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 75 transitions, 174 flow [2022-11-20 11:43:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:43:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:43:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2022-11-20 11:43:26,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8681318681318682 [2022-11-20 11:43:26,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2022-11-20 11:43:26,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2022-11-20 11:43:26,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:26,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2022-11-20 11:43:26,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 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) [2022-11-20 11:43:26,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,845 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 146 flow. Second operand 3 states and 237 transitions. [2022-11-20 11:43:26,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 75 transitions, 174 flow [2022-11-20 11:43:26,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 75 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:43:26,848 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 158 flow [2022-11-20 11:43:26,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2022-11-20 11:43:26,850 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 0 predicate places. [2022-11-20 11:43:26,851 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 158 flow [2022-11-20 11:43:26,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,852 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:26,853 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:26,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:43:26,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash -445185679, now seen corresponding path program 1 times [2022-11-20 11:43:26,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:26,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950453754] [2022-11-20 11:43:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:26,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:27,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:27,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950453754] [2022-11-20 11:43:27,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950453754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:27,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:27,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:27,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359520545] [2022-11-20 11:43:27,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:27,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:43:27,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:27,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:43:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:27,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 91 [2022-11-20 11:43:27,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:27,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 91 [2022-11-20 11:43:27,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:27,099 INFO L130 PetriNetUnfolder]: 2/83 cut-off events. [2022-11-20 11:43:27,100 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:43:27,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 83 events. 2/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 101. Up to 10 conditions per place. [2022-11-20 11:43:27,101 INFO L137 encePairwiseOnDemand]: 88/91 looper letters, 10 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-11-20 11:43:27,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 188 flow [2022-11-20 11:43:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:43:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:43:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2022-11-20 11:43:27,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8608058608058609 [2022-11-20 11:43:27,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2022-11-20 11:43:27,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2022-11-20 11:43:27,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:27,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2022-11-20 11:43:27,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 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) [2022-11-20 11:43:27,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,109 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 158 flow. Second operand 3 states and 235 transitions. [2022-11-20 11:43:27,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 188 flow [2022-11-20 11:43:27,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:43:27,120 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 168 flow [2022-11-20 11:43:27,121 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2022-11-20 11:43:27,123 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 2 predicate places. [2022-11-20 11:43:27,124 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 168 flow [2022-11-20 11:43:27,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,125 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:27,125 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:27,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:43:27,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:27,128 INFO L85 PathProgramCache]: Analyzing trace with hash 868716713, now seen corresponding path program 1 times [2022-11-20 11:43:27,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:27,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502468337] [2022-11-20 11:43:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:27,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:27,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:27,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502468337] [2022-11-20 11:43:27,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502468337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:27,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243882223] [2022-11-20 11:43:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:27,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:27,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:27,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:27,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:43:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:27,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:43:27,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:27,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:27,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243882223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:27,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:27,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:43:27,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931955036] [2022-11-20 11:43:27,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:27,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:43:27,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:27,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:43:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:43:27,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 91 [2022-11-20 11:43:27,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 168 flow. Second operand has 10 states, 10 states have (on average 75.9) internal successors, (759), 10 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:27,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 91 [2022-11-20 11:43:27,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:27,813 INFO L130 PetriNetUnfolder]: 2/93 cut-off events. [2022-11-20 11:43:27,813 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 11:43:27,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 93 events. 2/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 2/94 useless extension candidates. Maximal degree in co-relation 122. Up to 7 conditions per place. [2022-11-20 11:43:27,815 INFO L137 encePairwiseOnDemand]: 85/91 looper letters, 9 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2022-11-20 11:43:27,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 222 flow [2022-11-20 11:43:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:43:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:43:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 686 transitions. [2022-11-20 11:43:27,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8376068376068376 [2022-11-20 11:43:27,820 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 686 transitions. [2022-11-20 11:43:27,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 686 transitions. [2022-11-20 11:43:27,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:27,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 686 transitions. [2022-11-20 11:43:27,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 76.22222222222223) internal successors, (686), 9 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,829 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,829 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 168 flow. Second operand 9 states and 686 transitions. [2022-11-20 11:43:27,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 222 flow [2022-11-20 11:43:27,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 82 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:43:27,832 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 216 flow [2022-11-20 11:43:27,833 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=216, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2022-11-20 11:43:27,834 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2022-11-20 11:43:27,834 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 216 flow [2022-11-20 11:43:27,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 75.9) internal successors, (759), 10 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:27,840 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:27,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:28,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:28,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:28,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash 814704095, now seen corresponding path program 2 times [2022-11-20 11:43:28,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:28,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939665554] [2022-11-20 11:43:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:28,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:43:28,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:28,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939665554] [2022-11-20 11:43:28,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939665554] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:28,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47966227] [2022-11-20 11:43:28,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:43:28,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:28,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:28,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:28,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:43:28,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:43:28,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:43:28,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:43:28,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:43:28,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:43:28,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47966227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:28,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:28,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:43:28,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622080311] [2022-11-20 11:43:28,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:28,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:43:28,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:28,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:43:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:43:28,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 91 [2022-11-20 11:43:28,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 216 flow. Second operand has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:28,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:28,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 91 [2022-11-20 11:43:28,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:28,577 INFO L130 PetriNetUnfolder]: 2/100 cut-off events. [2022-11-20 11:43:28,578 INFO L131 PetriNetUnfolder]: For 7/21 co-relation queries the response was YES. [2022-11-20 11:43:28,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 100 events. 2/100 cut-off events. For 7/21 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 9/108 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-11-20 11:43:28,584 INFO L137 encePairwiseOnDemand]: 85/91 looper letters, 10 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2022-11-20 11:43:28,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 272 flow [2022-11-20 11:43:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:43:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:43:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 678 transitions. [2022-11-20 11:43:28,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8278388278388278 [2022-11-20 11:43:28,589 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 678 transitions. [2022-11-20 11:43:28,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 678 transitions. [2022-11-20 11:43:28,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:28,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 678 transitions. [2022-11-20 11:43:28,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 75.33333333333333) internal successors, (678), 9 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:28,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:28,596 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:28,597 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 216 flow. Second operand 9 states and 678 transitions. [2022-11-20 11:43:28,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 272 flow [2022-11-20 11:43:28,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 88 transitions, 266 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 11:43:28,602 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 260 flow [2022-11-20 11:43:28,602 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2022-11-20 11:43:28,603 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 22 predicate places. [2022-11-20 11:43:28,603 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 260 flow [2022-11-20 11:43:28,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:28,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:28,604 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:28,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 11:43:28,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:28,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:28,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1731941123, now seen corresponding path program 3 times [2022-11-20 11:43:28,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:28,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182131615] [2022-11-20 11:43:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:28,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:43:29,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:29,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182131615] [2022-11-20 11:43:29,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182131615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:29,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528563411] [2022-11-20 11:43:29,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:43:29,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:29,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:29,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:29,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:43:29,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:43:29,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:43:29,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:43:29,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:43:29,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:43:29,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528563411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:29,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:29,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:43:29,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095118805] [2022-11-20 11:43:29,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:29,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:43:29,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:29,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:43:29,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:43:29,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 91 [2022-11-20 11:43:29,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 260 flow. Second operand has 18 states, 18 states have (on average 75.0) internal successors, (1350), 18 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:29,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:29,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 91 [2022-11-20 11:43:29,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:29,715 INFO L130 PetriNetUnfolder]: 2/120 cut-off events. [2022-11-20 11:43:29,715 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-20 11:43:29,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 120 events. 2/120 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 4/123 useless extension candidates. Maximal degree in co-relation 231. Up to 11 conditions per place. [2022-11-20 11:43:29,719 INFO L137 encePairwiseOnDemand]: 85/91 looper letters, 14 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2022-11-20 11:43:29,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 104 transitions, 426 flow [2022-11-20 11:43:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:43:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:43:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1572 transitions. [2022-11-20 11:43:29,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8226059654631083 [2022-11-20 11:43:29,727 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1572 transitions. [2022-11-20 11:43:29,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1572 transitions. [2022-11-20 11:43:29,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:29,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1572 transitions. [2022-11-20 11:43:29,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 74.85714285714286) internal successors, (1572), 21 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:29,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 91.0) internal successors, (2002), 22 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:29,742 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 91.0) internal successors, (2002), 22 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:29,742 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 260 flow. Second operand 21 states and 1572 transitions. [2022-11-20 11:43:29,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 104 transitions, 426 flow [2022-11-20 11:43:29,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 104 transitions, 412 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:43:29,753 INFO L231 Difference]: Finished difference. Result has 122 places, 99 transitions, 384 flow [2022-11-20 11:43:29,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=384, PETRI_PLACES=122, PETRI_TRANSITIONS=99} [2022-11-20 11:43:29,757 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 46 predicate places. [2022-11-20 11:43:29,757 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 99 transitions, 384 flow [2022-11-20 11:43:29,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 75.0) internal successors, (1350), 18 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:29,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:29,763 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:29,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:29,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:29,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:29,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1924588193, now seen corresponding path program 4 times [2022-11-20 11:43:29,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:29,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301530192] [2022-11-20 11:43:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:29,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-20 11:43:30,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:30,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301530192] [2022-11-20 11:43:30,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301530192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:30,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969953283] [2022-11-20 11:43:30,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:43:30,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:30,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:30,220 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:30,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:43:30,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:43:30,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:43:30,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:43:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-20 11:43:30,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-20 11:43:30,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969953283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:30,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:30,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:43:30,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226366960] [2022-11-20 11:43:30,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:30,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:43:30,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:30,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:43:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:43:30,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 91 [2022-11-20 11:43:30,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 99 transitions, 384 flow. Second operand has 18 states, 18 states have (on average 75.94444444444444) internal successors, (1367), 18 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:30,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:30,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 91 [2022-11-20 11:43:30,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:30,819 INFO L130 PetriNetUnfolder]: 2/152 cut-off events. [2022-11-20 11:43:30,819 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-11-20 11:43:30,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 152 events. 2/152 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 105 event pairs, 0 based on Foata normal form. 4/155 useless extension candidates. Maximal degree in co-relation 316. Up to 11 conditions per place. [2022-11-20 11:43:30,823 INFO L137 encePairwiseOnDemand]: 85/91 looper letters, 13 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2022-11-20 11:43:30,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 117 transitions, 540 flow [2022-11-20 11:43:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:43:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:43:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1592 transitions. [2022-11-20 11:43:30,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8330716902145474 [2022-11-20 11:43:30,829 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1592 transitions. [2022-11-20 11:43:30,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1592 transitions. [2022-11-20 11:43:30,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:30,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1592 transitions. [2022-11-20 11:43:30,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 75.80952380952381) internal successors, (1592), 21 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:30,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 91.0) internal successors, (2002), 22 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:30,839 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 91.0) internal successors, (2002), 22 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:30,839 INFO L175 Difference]: Start difference. First operand has 122 places, 99 transitions, 384 flow. Second operand 21 states and 1592 transitions. [2022-11-20 11:43:30,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 117 transitions, 540 flow [2022-11-20 11:43:30,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 117 transitions, 516 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-11-20 11:43:30,849 INFO L231 Difference]: Finished difference. Result has 141 places, 112 transitions, 490 flow [2022-11-20 11:43:30,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=490, PETRI_PLACES=141, PETRI_TRANSITIONS=112} [2022-11-20 11:43:30,850 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 65 predicate places. [2022-11-20 11:43:30,850 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 112 transitions, 490 flow [2022-11-20 11:43:30,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 75.94444444444444) internal successors, (1367), 18 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:30,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:30,851 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:30,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:31,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:31,057 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1128218315, now seen corresponding path program 5 times [2022-11-20 11:43:31,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:31,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340568569] [2022-11-20 11:43:31,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:31,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-20 11:43:31,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:31,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340568569] [2022-11-20 11:43:31,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340568569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:31,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763853057] [2022-11-20 11:43:31,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:43:31,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:31,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:31,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:31,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:43:31,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 11:43:31,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:43:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:43:31,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-20 11:43:31,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-20 11:43:32,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763853057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:32,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:32,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-20 11:43:32,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563684222] [2022-11-20 11:43:32,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:32,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 11:43:32,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:32,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 11:43:32,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 11:43:32,477 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 91 [2022-11-20 11:43:32,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 112 transitions, 490 flow. Second operand has 47 states, 47 states have (on average 68.27659574468085) internal successors, (3209), 47 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:32,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:32,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 91 [2022-11-20 11:43:32,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:45:01,119 INFO L130 PetriNetUnfolder]: 2395/5830 cut-off events. [2022-11-20 11:45:01,120 INFO L131 PetriNetUnfolder]: For 24300/24300 co-relation queries the response was YES. [2022-11-20 11:45:01,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23049 conditions, 5830 events. 2395/5830 cut-off events. For 24300/24300 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 38376 event pairs, 18 based on Foata normal form. 367/6192 useless extension candidates. Maximal degree in co-relation 23028. Up to 988 conditions per place. [2022-11-20 11:45:01,189 INFO L137 encePairwiseOnDemand]: 80/91 looper letters, 1078 selfloop transitions, 2047 changer transitions 0/3180 dead transitions. [2022-11-20 11:45:01,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1153 places, 3180 transitions, 28814 flow [2022-11-20 11:45:01,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1013 states. [2022-11-20 11:45:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2022-11-20 11:45:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 70211 transitions. [2022-11-20 11:45:01,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.761648026208737 [2022-11-20 11:45:01,323 INFO L72 ComplementDD]: Start complementDD. Operand 1013 states and 70211 transitions. [2022-11-20 11:45:01,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1013 states and 70211 transitions. [2022-11-20 11:45:01,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:45:01,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 1013 states and 70211 transitions. [2022-11-20 11:45:01,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 1014 states, 1013 states have (on average 69.30997038499507) internal successors, (70211), 1013 states have internal predecessors, (70211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:01,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 1014 states, 1014 states have (on average 91.0) internal successors, (92274), 1014 states have internal predecessors, (92274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:01,719 INFO L81 ComplementDD]: Finished complementDD. Result has 1014 states, 1014 states have (on average 91.0) internal successors, (92274), 1014 states have internal predecessors, (92274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:01,720 INFO L175 Difference]: Start difference. First operand has 141 places, 112 transitions, 490 flow. Second operand 1013 states and 70211 transitions. [2022-11-20 11:45:01,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1153 places, 3180 transitions, 28814 flow [2022-11-20 11:45:01,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1147 places, 3180 transitions, 27670 flow, removed 308 selfloop flow, removed 6 redundant places. [2022-11-20 11:45:01,848 INFO L231 Difference]: Finished difference. Result has 1459 places, 2207 transitions, 20222 flow [2022-11-20 11:45:01,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=1013, PETRI_FLOW=20222, PETRI_PLACES=1459, PETRI_TRANSITIONS=2207} [2022-11-20 11:45:01,852 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 1383 predicate places. [2022-11-20 11:45:01,852 INFO L495 AbstractCegarLoop]: Abstraction has has 1459 places, 2207 transitions, 20222 flow [2022-11-20 11:45:01,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 68.27659574468085) internal successors, (3209), 47 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:01,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:01,854 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:01,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:02,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:02,068 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:02,069 INFO L85 PathProgramCache]: Analyzing trace with hash 68071328, now seen corresponding path program 6 times [2022-11-20 11:45:02,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:02,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119151244] [2022-11-20 11:45:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:02,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-11-20 11:45:03,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:03,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119151244] [2022-11-20 11:45:03,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119151244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:03,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047022857] [2022-11-20 11:45:03,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:45:03,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:03,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:03,472 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:03,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:45:03,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-20 11:45:03,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:03,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:45:03,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-11-20 11:45:03,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-11-20 11:45:04,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047022857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:04,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:04,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 43 [2022-11-20 11:45:04,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186605205] [2022-11-20 11:45:04,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:04,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 11:45:04,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 11:45:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:45:04,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 91 [2022-11-20 11:45:04,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1459 places, 2207 transitions, 20222 flow. Second operand has 43 states, 43 states have (on average 75.04651162790698) internal successors, (3227), 43 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:04,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:04,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 91 [2022-11-20 11:45:04,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:45:11,189 INFO L130 PetriNetUnfolder]: 1657/5179 cut-off events. [2022-11-20 11:45:11,189 INFO L131 PetriNetUnfolder]: For 909419/910339 co-relation queries the response was YES. [2022-11-20 11:45:11,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31137 conditions, 5179 events. 1657/5179 cut-off events. For 909419/910339 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 36506 event pairs, 48 based on Foata normal form. 98/5207 useless extension candidates. Maximal degree in co-relation 30804. Up to 848 conditions per place. [2022-11-20 11:45:11,340 INFO L137 encePairwiseOnDemand]: 85/91 looper letters, 181 selfloop transitions, 1380 changer transitions 0/2679 dead transitions. [2022-11-20 11:45:11,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1518 places, 2679 transitions, 28598 flow [2022-11-20 11:45:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-20 11:45:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-20 11:45:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4472 transitions. [2022-11-20 11:45:11,347 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.819047619047619 [2022-11-20 11:45:11,348 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4472 transitions. [2022-11-20 11:45:11,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4472 transitions. [2022-11-20 11:45:11,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:45:11,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4472 transitions. [2022-11-20 11:45:11,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 74.53333333333333) internal successors, (4472), 60 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:11,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 91.0) internal successors, (5551), 61 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:11,370 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 91.0) internal successors, (5551), 61 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:11,371 INFO L175 Difference]: Start difference. First operand has 1459 places, 2207 transitions, 20222 flow. Second operand 60 states and 4472 transitions. [2022-11-20 11:45:11,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1518 places, 2679 transitions, 28598 flow [2022-11-20 11:45:15,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1482 places, 2679 transitions, 25320 flow, removed 433 selfloop flow, removed 36 redundant places. [2022-11-20 11:45:15,247 INFO L231 Difference]: Finished difference. Result has 1488 places, 2575 transitions, 23716 flow [2022-11-20 11:45:15,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=17174, PETRI_DIFFERENCE_MINUEND_PLACES=1423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=23716, PETRI_PLACES=1488, PETRI_TRANSITIONS=2575} [2022-11-20 11:45:15,251 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 1412 predicate places. [2022-11-20 11:45:15,252 INFO L495 AbstractCegarLoop]: Abstraction has has 1488 places, 2575 transitions, 23716 flow [2022-11-20 11:45:15,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 75.04651162790698) internal successors, (3227), 43 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:15,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:15,254 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:15,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:15,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:15,461 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:15,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:15,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1722511618, now seen corresponding path program 7 times [2022-11-20 11:45:15,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:15,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089594717] [2022-11-20 11:45:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:15,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 399 proven. 232 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2022-11-20 11:45:16,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:16,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089594717] [2022-11-20 11:45:16,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089594717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:16,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715777730] [2022-11-20 11:45:16,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:45:16,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:16,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:16,159 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:16,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:45:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:45:16,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 399 proven. 232 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2022-11-20 11:45:16,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 399 proven. 232 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2022-11-20 11:45:16,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715777730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:16,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:16,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2022-11-20 11:45:16,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128442091] [2022-11-20 11:45:16,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:16,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 11:45:16,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:16,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 11:45:16,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:45:16,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 91 [2022-11-20 11:45:17,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1488 places, 2575 transitions, 23716 flow. Second operand has 38 states, 38 states have (on average 75.97368421052632) internal successors, (2887), 38 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:17,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:17,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 91 [2022-11-20 11:45:17,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:45:24,874 INFO L130 PetriNetUnfolder]: 2433/7600 cut-off events. [2022-11-20 11:45:24,875 INFO L131 PetriNetUnfolder]: For 2458637/2462133 co-relation queries the response was YES. [2022-11-20 11:45:25,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63634 conditions, 7600 events. 2433/7600 cut-off events. For 2458637/2462133 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 60608 event pairs, 297 based on Foata normal form. 765/8164 useless extension candidates. Maximal degree in co-relation 63295. Up to 1325 conditions per place. [2022-11-20 11:45:25,100 INFO L137 encePairwiseOnDemand]: 85/91 looper letters, 23 selfloop transitions, 1427 changer transitions 0/2960 dead transitions. [2022-11-20 11:45:25,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1538 places, 2960 transitions, 32646 flow [2022-11-20 11:45:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 11:45:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-20 11:45:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3857 transitions. [2022-11-20 11:45:25,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8310708898944194 [2022-11-20 11:45:25,106 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3857 transitions. [2022-11-20 11:45:25,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3857 transitions. [2022-11-20 11:45:25,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:45:25,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3857 transitions. [2022-11-20 11:45:25,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 75.62745098039215) internal successors, (3857), 51 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:25,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 91.0) internal successors, (4732), 52 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:25,122 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 91.0) internal successors, (4732), 52 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:25,122 INFO L175 Difference]: Start difference. First operand has 1488 places, 2575 transitions, 23716 flow. Second operand 51 states and 3857 transitions. [2022-11-20 11:45:25,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1538 places, 2960 transitions, 32646 flow [2022-11-20 11:45:36,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1496 places, 2960 transitions, 30714 flow, removed 0 selfloop flow, removed 42 redundant places. [2022-11-20 11:45:36,437 INFO L231 Difference]: Finished difference. Result has 1506 places, 2946 transitions, 30721 flow [2022-11-20 11:45:36,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=21784, PETRI_DIFFERENCE_MINUEND_PLACES=1446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=30721, PETRI_PLACES=1506, PETRI_TRANSITIONS=2946} [2022-11-20 11:45:36,441 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 1430 predicate places. [2022-11-20 11:45:36,441 INFO L495 AbstractCegarLoop]: Abstraction has has 1506 places, 2946 transitions, 30721 flow [2022-11-20 11:45:36,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 75.97368421052632) internal successors, (2887), 38 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:36,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:36,442 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:36,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:36,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:45:36,649 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:36,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1212264865, now seen corresponding path program 8 times [2022-11-20 11:45:36,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:36,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95656551] [2022-11-20 11:45:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:36,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2075 backedges. 0 proven. 2075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:40,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:40,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95656551] [2022-11-20 11:45:40,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95656551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:40,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329213814] [2022-11-20 11:45:40,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:45:40,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:40,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:40,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:40,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42c762d-dbdb-447f-93e4-4dea415c6be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:45:40,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:45:40,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:40,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:45:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2075 backedges. 0 proven. 1504 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2022-11-20 11:45:42,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2075 backedges. 0 proven. 1504 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2022-11-20 11:45:44,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329213814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:44,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:44,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 37, 37] total 100 [2022-11-20 11:45:44,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522136632] [2022-11-20 11:45:44,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:44,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-20 11:45:44,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-20 11:45:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1432, Invalid=8468, Unknown=0, NotChecked=0, Total=9900 [2022-11-20 11:45:44,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 91 [2022-11-20 11:45:44,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1506 places, 2946 transitions, 30721 flow. Second operand has 100 states, 100 states have (on average 66.0) internal successors, (6600), 100 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:44,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:44,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 91 [2022-11-20 11:45:44,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand