./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc --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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- 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-5e519f3 [2022-11-02 20:59:05,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:59:05,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:59:05,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:59:05,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:59:05,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:59:05,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:59:05,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:59:05,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:59:05,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:59:05,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:59:05,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:59:05,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:59:05,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:59:05,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:59:05,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:59:05,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:59:05,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:59:05,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:59:05,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:59:05,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:59:05,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:59:05,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:59:05,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:59:05,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:59:05,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:59:05,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:59:05,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:59:05,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:59:05,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:59:05,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:59:05,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:59:06,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:59:06,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:59:06,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:59:06,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:59:06,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:59:06,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:59:06,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:59:06,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:59:06,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:59:06,008 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:59:06,046 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:59:06,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:59:06,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:59:06,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:59:06,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:59:06,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:59:06,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:59:06,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:59:06,050 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:59:06,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:59:06,052 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:59:06,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:59:06,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:59:06,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:59:06,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:59:06,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:59:06,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:59:06,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:59:06,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:59:06,054 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:59:06,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:59:06,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:59:06,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:59:06,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:59:06,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:59:06,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:59:06,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:59:06,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:59:06,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:59:06,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:59:06,058 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:59:06,058 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:59:06,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:59:06,058 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_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2022-11-02 20:59:06,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:59:06,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:59:06,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:59:06,383 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:59:06,383 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:59:06,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-02 20:59:06,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/data/a4c3d8e98/25260af1afe544498fd8ef4b9ae9cccb/FLAG9d6b1c062 [2022-11-02 20:59:07,014 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:59:07,015 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-02 20:59:07,046 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/data/a4c3d8e98/25260af1afe544498fd8ef4b9ae9cccb/FLAG9d6b1c062 [2022-11-02 20:59:07,293 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/data/a4c3d8e98/25260af1afe544498fd8ef4b9ae9cccb [2022-11-02 20:59:07,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:59:07,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:59:07,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:59:07,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:59:07,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:59:07,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:59:07" (1/1) ... [2022-11-02 20:59:07,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fafc357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:07, skipping insertion in model container [2022-11-02 20:59:07,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:59:07" (1/1) ... [2022-11-02 20:59:07,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:59:07,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:59:07,835 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-02 20:59:07,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:59:07,870 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:59:07,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-02 20:59:07,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:59:08,001 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:59:08,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08 WrapperNode [2022-11-02 20:59:08,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:59:08,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:59:08,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:59:08,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:59:08,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (1/1) ... [2022-11-02 20:59:08,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (1/1) ... [2022-11-02 20:59:08,072 INFO L138 Inliner]: procedures = 277, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 150 [2022-11-02 20:59:08,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:59:08,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:59:08,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:59:08,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:59:08,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (1/1) ... [2022-11-02 20:59:08,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (1/1) ... [2022-11-02 20:59:08,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (1/1) ... [2022-11-02 20:59:08,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (1/1) ... [2022-11-02 20:59:08,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (1/1) ... [2022-11-02 20:59:08,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (1/1) ... [2022-11-02 20:59:08,103 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (1/1) ... [2022-11-02 20:59:08,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (1/1) ... [2022-11-02 20:59:08,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:59:08,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:59:08,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:59:08,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:59:08,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (1/1) ... [2022-11-02 20:59:08,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:59:08,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:08,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:59:08,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:59:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-02 20:59:08,206 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-02 20:59:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-02 20:59:08,207 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-02 20:59:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:59:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:59:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:59:08,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:59:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:59:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:59:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:59:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:59:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:59:08,217 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:59:08,390 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:59:08,392 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:59:08,712 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:59:08,721 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:59:08,721 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:59:08,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:59:08 BoogieIcfgContainer [2022-11-02 20:59:08,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:59:08,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:59:08,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:59:08,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:59:08,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:59:07" (1/3) ... [2022-11-02 20:59:08,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d03015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:59:08, skipping insertion in model container [2022-11-02 20:59:08,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:08" (2/3) ... [2022-11-02 20:59:08,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d03015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:59:08, skipping insertion in model container [2022-11-02 20:59:08,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:59:08" (3/3) ... [2022-11-02 20:59:08,734 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-11-02 20:59:08,743 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:59:08,754 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:59:08,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 20:59:08,754 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:59:08,919 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:59:08,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 360 flow [2022-11-02 20:59:09,126 INFO L130 PetriNetUnfolder]: 10/170 cut-off events. [2022-11-02 20:59:09,126 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:59:09,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 170 events. 10/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 414 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-02 20:59:09,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 172 transitions, 360 flow [2022-11-02 20:59:09,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 160 transitions, 329 flow [2022-11-02 20:59:09,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:59:09,177 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;@3f53fb1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:59:09,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:59:09,233 INFO L130 PetriNetUnfolder]: 5/129 cut-off events. [2022-11-02 20:59:09,233 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:59:09,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:09,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:09,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:59:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:09,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2105074172, now seen corresponding path program 1 times [2022-11-02 20:59:09,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:09,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580270863] [2022-11-02 20:59:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:09,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:09,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580270863] [2022-11-02 20:59:09,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580270863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:09,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:09,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:59:09,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096221552] [2022-11-02 20:59:09,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:09,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:59:09,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:09,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:59:09,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:59:09,757 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 172 [2022-11-02 20:59:09,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 160 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:09,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:09,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 172 [2022-11-02 20:59:09,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:59:10,031 INFO L130 PetriNetUnfolder]: 88/699 cut-off events. [2022-11-02 20:59:10,031 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-02 20:59:10,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 699 events. 88/699 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3112 event pairs, 32 based on Foata normal form. 69/702 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-11-02 20:59:10,042 INFO L137 encePairwiseOnDemand]: 162/172 looper letters, 20 selfloop transitions, 3 changer transitions 0/158 dead transitions. [2022-11-02 20:59:10,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 158 transitions, 377 flow [2022-11-02 20:59:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:59:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:59:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2022-11-02 20:59:10,069 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9282945736434108 [2022-11-02 20:59:10,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2022-11-02 20:59:10,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2022-11-02 20:59:10,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:59:10,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2022-11-02 20:59:10,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:10,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:10,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:10,095 INFO L175 Difference]: Start difference. First operand has 157 places, 160 transitions, 329 flow. Second operand 3 states and 479 transitions. [2022-11-02 20:59:10,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 158 transitions, 377 flow [2022-11-02 20:59:10,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 158 transitions, 369 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-02 20:59:10,111 INFO L231 Difference]: Finished difference. Result has 153 places, 152 transitions, 323 flow [2022-11-02 20:59:10,114 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=153, PETRI_TRANSITIONS=152} [2022-11-02 20:59:10,119 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, -4 predicate places. [2022-11-02 20:59:10,120 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 152 transitions, 323 flow [2022-11-02 20:59:10,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:10,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:10,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:10,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:59:10,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:59:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1103212847, now seen corresponding path program 1 times [2022-11-02 20:59:10,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:10,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247290677] [2022-11-02 20:59:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:10,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:10,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:10,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247290677] [2022-11-02 20:59:10,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247290677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:10,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:10,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:59:10,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955094320] [2022-11-02 20:59:10,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:10,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:59:10,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:59:10,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:59:10,319 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 172 [2022-11-02 20:59:10,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 152 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:10,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:10,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 172 [2022-11-02 20:59:10,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:59:10,524 INFO L130 PetriNetUnfolder]: 34/590 cut-off events. [2022-11-02 20:59:10,524 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-02 20:59:10,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 590 events. 34/590 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2053 event pairs, 11 based on Foata normal form. 0/553 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-11-02 20:59:10,530 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 16 selfloop transitions, 4 changer transitions 0/160 dead transitions. [2022-11-02 20:59:10,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 384 flow [2022-11-02 20:59:10,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:59:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-02 20:59:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2022-11-02 20:59:10,534 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9142441860465116 [2022-11-02 20:59:10,535 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2022-11-02 20:59:10,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2022-11-02 20:59:10,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:59:10,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2022-11-02 20:59:10,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:10,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:10,542 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:10,542 INFO L175 Difference]: Start difference. First operand has 153 places, 152 transitions, 323 flow. Second operand 4 states and 629 transitions. [2022-11-02 20:59:10,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 384 flow [2022-11-02 20:59:10,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 160 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:59:10,551 INFO L231 Difference]: Finished difference. Result has 157 places, 155 transitions, 348 flow [2022-11-02 20:59:10,551 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=348, PETRI_PLACES=157, PETRI_TRANSITIONS=155} [2022-11-02 20:59:10,552 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 0 predicate places. [2022-11-02 20:59:10,552 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 155 transitions, 348 flow [2022-11-02 20:59:10,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:10,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:10,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:10,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:59:10,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:59:10,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:10,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1628458080, now seen corresponding path program 1 times [2022-11-02 20:59:10,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:10,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54832998] [2022-11-02 20:59:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:10,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:10,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:10,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54832998] [2022-11-02 20:59:10,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54832998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:10,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:10,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:59:10,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008220799] [2022-11-02 20:59:10,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:10,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:59:10,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:10,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:59:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:59:10,783 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 172 [2022-11-02 20:59:10,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 155 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:10,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:10,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 172 [2022-11-02 20:59:10,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:59:11,155 INFO L130 PetriNetUnfolder]: 127/1267 cut-off events. [2022-11-02 20:59:11,155 INFO L131 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-11-02 20:59:11,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 1267 events. 127/1267 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6944 event pairs, 33 based on Foata normal form. 12/1205 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-11-02 20:59:11,168 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 25 selfloop transitions, 4 changer transitions 0/167 dead transitions. [2022-11-02 20:59:11,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 167 transitions, 439 flow [2022-11-02 20:59:11,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:59:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:59:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2022-11-02 20:59:11,171 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9186046511627907 [2022-11-02 20:59:11,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2022-11-02 20:59:11,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2022-11-02 20:59:11,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:59:11,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2022-11-02 20:59:11,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:11,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:11,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:11,177 INFO L175 Difference]: Start difference. First operand has 157 places, 155 transitions, 348 flow. Second operand 3 states and 474 transitions. [2022-11-02 20:59:11,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 167 transitions, 439 flow [2022-11-02 20:59:11,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 167 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:59:11,186 INFO L231 Difference]: Finished difference. Result has 160 places, 159 transitions, 388 flow [2022-11-02 20:59:11,187 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=388, PETRI_PLACES=160, PETRI_TRANSITIONS=159} [2022-11-02 20:59:11,189 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 3 predicate places. [2022-11-02 20:59:11,189 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 159 transitions, 388 flow [2022-11-02 20:59:11,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:11,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:11,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:11,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:59:11,191 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:59:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash 585023441, now seen corresponding path program 1 times [2022-11-02 20:59:11,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:11,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926803952] [2022-11-02 20:59:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:11,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:11,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:11,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926803952] [2022-11-02 20:59:11,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926803952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:11,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175406319] [2022-11-02 20:59:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:11,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:11,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:11,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:11,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:59:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:11,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:59:11,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:11,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:12,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175406319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:12,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:12,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:59:12,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922314730] [2022-11-02 20:59:12,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:12,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:59:12,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:59:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:59:12,169 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-11-02 20:59:12,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 159 transitions, 388 flow. Second operand has 10 states, 10 states have (on average 148.5) internal successors, (1485), 10 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:12,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:12,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-11-02 20:59:12,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:59:12,889 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([465] L1008-->L1008-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][178], [Black: 174#(= ~top~0 0), 113#L945-2true, 30#L1008-1true, Black: 182#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), Black: 179#(= |t1Thread1of1ForFork0_push_#res#1| 0), 186#true, t2Thread1of1ForFork1InUse, 19#L1022-4true, 230#(<= ~top~0 0), Black: 188#(<= 1 ~top~0)]) [2022-11-02 20:59:12,890 INFO L383 tUnfolder$Statistics]: this new event has 185 ancestors and is cut-off event [2022-11-02 20:59:12,893 INFO L386 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2022-11-02 20:59:12,893 INFO L386 tUnfolder$Statistics]: existing Event has 164 ancestors and is cut-off event [2022-11-02 20:59:12,893 INFO L386 tUnfolder$Statistics]: existing Event has 157 ancestors and is cut-off event [2022-11-02 20:59:12,894 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([464] L1008-->L1010: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][179], [Black: 174#(= ~top~0 0), 72#L1010true, 113#L945-2true, Black: 182#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), 192#true, Black: 179#(= |t1Thread1of1ForFork0_push_#res#1| 0), t2Thread1of1ForFork1InUse, 19#L1022-4true, 188#(<= 1 ~top~0), Black: 186#true]) [2022-11-02 20:59:12,894 INFO L383 tUnfolder$Statistics]: this new event has 185 ancestors and is cut-off event [2022-11-02 20:59:12,895 INFO L386 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2022-11-02 20:59:12,895 INFO L386 tUnfolder$Statistics]: existing Event has 164 ancestors and is cut-off event [2022-11-02 20:59:12,895 INFO L386 tUnfolder$Statistics]: existing Event has 157 ancestors and is cut-off event [2022-11-02 20:59:13,000 INFO L130 PetriNetUnfolder]: 387/2990 cut-off events. [2022-11-02 20:59:13,005 INFO L131 PetriNetUnfolder]: For 1008/1064 co-relation queries the response was YES. [2022-11-02 20:59:13,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4470 conditions, 2990 events. 387/2990 cut-off events. For 1008/1064 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 21596 event pairs, 43 based on Foata normal form. 40/2871 useless extension candidates. Maximal degree in co-relation 3934. Up to 300 conditions per place. [2022-11-02 20:59:13,029 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 86 selfloop transitions, 46 changer transitions 1/269 dead transitions. [2022-11-02 20:59:13,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 269 transitions, 1070 flow [2022-11-02 20:59:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:59:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:59:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2759 transitions. [2022-11-02 20:59:13,036 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8911498708010336 [2022-11-02 20:59:13,036 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2759 transitions. [2022-11-02 20:59:13,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2759 transitions. [2022-11-02 20:59:13,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:59:13,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2759 transitions. [2022-11-02 20:59:13,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.27777777777777) internal successors, (2759), 18 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:13,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:13,051 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:13,051 INFO L175 Difference]: Start difference. First operand has 160 places, 159 transitions, 388 flow. Second operand 18 states and 2759 transitions. [2022-11-02 20:59:13,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 269 transitions, 1070 flow [2022-11-02 20:59:13,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 269 transitions, 1008 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-02 20:59:13,060 INFO L231 Difference]: Finished difference. Result has 181 places, 214 transitions, 759 flow [2022-11-02 20:59:13,060 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=759, PETRI_PLACES=181, PETRI_TRANSITIONS=214} [2022-11-02 20:59:13,061 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 24 predicate places. [2022-11-02 20:59:13,061 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 214 transitions, 759 flow [2022-11-02 20:59:13,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.5) internal successors, (1485), 10 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:13,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:13,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:13,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:13,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:13,282 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:59:13,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:13,282 INFO L85 PathProgramCache]: Analyzing trace with hash -240965741, now seen corresponding path program 1 times [2022-11-02 20:59:13,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:13,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879028312] [2022-11-02 20:59:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:13,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:13,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:13,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879028312] [2022-11-02 20:59:13,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879028312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:13,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:13,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:59:13,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528928140] [2022-11-02 20:59:13,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:13,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:59:13,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:13,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:59:13,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:59:13,520 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 172 [2022-11-02 20:59:13,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 214 transitions, 759 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:13,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:13,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 172 [2022-11-02 20:59:13,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:59:13,750 INFO L130 PetriNetUnfolder]: 53/1113 cut-off events. [2022-11-02 20:59:13,751 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-02 20:59:13,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 1113 events. 53/1113 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4912 event pairs, 9 based on Foata normal form. 17/1088 useless extension candidates. Maximal degree in co-relation 997. Up to 49 conditions per place. [2022-11-02 20:59:13,758 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 12 selfloop transitions, 4 changer transitions 0/173 dead transitions. [2022-11-02 20:59:13,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 173 transitions, 536 flow [2022-11-02 20:59:13,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:59:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:59:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2022-11-02 20:59:13,760 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9069767441860465 [2022-11-02 20:59:13,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2022-11-02 20:59:13,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2022-11-02 20:59:13,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:59:13,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2022-11-02 20:59:13,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:13,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:13,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:13,763 INFO L175 Difference]: Start difference. First operand has 181 places, 214 transitions, 759 flow. Second operand 3 states and 468 transitions. [2022-11-02 20:59:13,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 173 transitions, 536 flow [2022-11-02 20:59:13,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 173 transitions, 514 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-02 20:59:13,770 INFO L231 Difference]: Finished difference. Result has 171 places, 171 transitions, 483 flow [2022-11-02 20:59:13,770 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=483, PETRI_PLACES=171, PETRI_TRANSITIONS=171} [2022-11-02 20:59:13,772 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 14 predicate places. [2022-11-02 20:59:13,773 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 171 transitions, 483 flow [2022-11-02 20:59:13,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:13,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:13,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:13,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:59:13,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:59:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 230931441, now seen corresponding path program 1 times [2022-11-02 20:59:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:13,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356486123] [2022-11-02 20:59:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:13,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:16,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:16,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356486123] [2022-11-02 20:59:16,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356486123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:16,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:16,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-11-02 20:59:16,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293023208] [2022-11-02 20:59:16,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:16,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:59:16,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:16,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:59:16,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:59:16,335 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 172 [2022-11-02 20:59:16,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 171 transitions, 483 flow. Second operand has 30 states, 30 states have (on average 85.23333333333333) internal successors, (2557), 30 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:16,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:16,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 172 [2022-11-02 20:59:16,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:59:20,123 INFO L130 PetriNetUnfolder]: 1065/4236 cut-off events. [2022-11-02 20:59:20,124 INFO L131 PetriNetUnfolder]: For 781/781 co-relation queries the response was YES. [2022-11-02 20:59:20,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7972 conditions, 4236 events. 1065/4236 cut-off events. For 781/781 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 31527 event pairs, 73 based on Foata normal form. 0/4095 useless extension candidates. Maximal degree in co-relation 5815. Up to 1366 conditions per place. [2022-11-02 20:59:20,163 INFO L137 encePairwiseOnDemand]: 137/172 looper letters, 264 selfloop transitions, 37 changer transitions 2/379 dead transitions. [2022-11-02 20:59:20,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 379 transitions, 1680 flow [2022-11-02 20:59:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:59:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-02 20:59:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3092 transitions. [2022-11-02 20:59:20,174 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5287277701778386 [2022-11-02 20:59:20,175 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3092 transitions. [2022-11-02 20:59:20,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3092 transitions. [2022-11-02 20:59:20,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:59:20,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3092 transitions. [2022-11-02 20:59:20,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 90.94117647058823) internal successors, (3092), 34 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:20,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 172.0) internal successors, (6020), 35 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:20,208 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 172.0) internal successors, (6020), 35 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:20,208 INFO L175 Difference]: Start difference. First operand has 171 places, 171 transitions, 483 flow. Second operand 34 states and 3092 transitions. [2022-11-02 20:59:20,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 379 transitions, 1680 flow [2022-11-02 20:59:20,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 379 transitions, 1676 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:59:20,222 INFO L231 Difference]: Finished difference. Result has 226 places, 200 transitions, 724 flow [2022-11-02 20:59:20,223 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=724, PETRI_PLACES=226, PETRI_TRANSITIONS=200} [2022-11-02 20:59:20,228 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 69 predicate places. [2022-11-02 20:59:20,228 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 200 transitions, 724 flow [2022-11-02 20:59:20,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 85.23333333333333) internal successors, (2557), 30 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:20,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:20,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:20,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:59:20,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:59:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:20,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1232739005, now seen corresponding path program 1 times [2022-11-02 20:59:20,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:20,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052625349] [2022-11-02 20:59:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:20,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:20,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:20,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052625349] [2022-11-02 20:59:20,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052625349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:20,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723643732] [2022-11-02 20:59:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:20,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:20,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:20,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:20,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:59:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:20,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:59:20,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:59:20,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:59:21,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723643732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:21,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:21,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-11-02 20:59:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101403660] [2022-11-02 20:59:21,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:59:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:59:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:59:21,114 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 172 [2022-11-02 20:59:21,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 200 transitions, 724 flow. Second operand has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:21,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:21,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 172 [2022-11-02 20:59:21,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:59:21,749 INFO L130 PetriNetUnfolder]: 147/1995 cut-off events. [2022-11-02 20:59:21,750 INFO L131 PetriNetUnfolder]: For 707/707 co-relation queries the response was YES. [2022-11-02 20:59:21,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3517 conditions, 1995 events. 147/1995 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12044 event pairs, 27 based on Foata normal form. 9/1962 useless extension candidates. Maximal degree in co-relation 2527. Up to 76 conditions per place. [2022-11-02 20:59:21,770 INFO L137 encePairwiseOnDemand]: 161/172 looper letters, 50 selfloop transitions, 39 changer transitions 0/243 dead transitions. [2022-11-02 20:59:21,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 243 transitions, 1070 flow [2022-11-02 20:59:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:59:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:59:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2665 transitions. [2022-11-02 20:59:21,776 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8607881136950905 [2022-11-02 20:59:21,776 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2665 transitions. [2022-11-02 20:59:21,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2665 transitions. [2022-11-02 20:59:21,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:59:21,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2665 transitions. [2022-11-02 20:59:21,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 148.05555555555554) internal successors, (2665), 18 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:21,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:21,791 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:21,792 INFO L175 Difference]: Start difference. First operand has 226 places, 200 transitions, 724 flow. Second operand 18 states and 2665 transitions. [2022-11-02 20:59:21,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 243 transitions, 1070 flow [2022-11-02 20:59:21,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 243 transitions, 1052 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-11-02 20:59:21,807 INFO L231 Difference]: Finished difference. Result has 240 places, 212 transitions, 892 flow [2022-11-02 20:59:21,808 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=892, PETRI_PLACES=240, PETRI_TRANSITIONS=212} [2022-11-02 20:59:21,808 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 83 predicate places. [2022-11-02 20:59:21,808 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 212 transitions, 892 flow [2022-11-02 20:59:21,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:21,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:21,810 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:21,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:22,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:59:22,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:59:22,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:22,035 INFO L85 PathProgramCache]: Analyzing trace with hash 228903536, now seen corresponding path program 1 times [2022-11-02 20:59:22,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:22,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527982196] [2022-11-02 20:59:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:59:23,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:23,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527982196] [2022-11-02 20:59:23,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527982196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:23,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873287270] [2022-11-02 20:59:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:23,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:23,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:23,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:23,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:59:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-02 20:59:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:25,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-02 20:59:26,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-02 20:59:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:59:26,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:27,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-02 20:59:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:59:28,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873287270] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:28,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:59:28,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [23, 26] total 66 [2022-11-02 20:59:28,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640147752] [2022-11-02 20:59:28,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:28,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:59:28,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:28,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:59:28,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4050, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:59:28,398 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 172 [2022-11-02 20:59:28,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 212 transitions, 892 flow. Second operand has 22 states, 22 states have (on average 100.45454545454545) internal successors, (2210), 22 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:28,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:28,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 172 [2022-11-02 20:59:28,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:59:37,791 INFO L130 PetriNetUnfolder]: 2268/9129 cut-off events. [2022-11-02 20:59:37,791 INFO L131 PetriNetUnfolder]: For 4300/4300 co-relation queries the response was YES. [2022-11-02 20:59:37,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19922 conditions, 9129 events. 2268/9129 cut-off events. For 4300/4300 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 80378 event pairs, 341 based on Foata normal form. 12/8952 useless extension candidates. Maximal degree in co-relation 13458. Up to 1194 conditions per place. [2022-11-02 20:59:37,887 INFO L137 encePairwiseOnDemand]: 137/172 looper letters, 268 selfloop transitions, 174 changer transitions 3/531 dead transitions. [2022-11-02 20:59:37,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 531 transitions, 3109 flow [2022-11-02 20:59:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-02 20:59:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-02 20:59:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 6726 transitions. [2022-11-02 20:59:37,901 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5924947145877378 [2022-11-02 20:59:37,901 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 6726 transitions. [2022-11-02 20:59:37,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 6726 transitions. [2022-11-02 20:59:37,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:59:37,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 6726 transitions. [2022-11-02 20:59:37,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 101.9090909090909) internal successors, (6726), 66 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:37,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 172.0) internal successors, (11524), 67 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:37,944 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 172.0) internal successors, (11524), 67 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:37,944 INFO L175 Difference]: Start difference. First operand has 240 places, 212 transitions, 892 flow. Second operand 66 states and 6726 transitions. [2022-11-02 20:59:37,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 531 transitions, 3109 flow [2022-11-02 20:59:37,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 531 transitions, 2944 flow, removed 32 selfloop flow, removed 6 redundant places. [2022-11-02 20:59:37,976 INFO L231 Difference]: Finished difference. Result has 318 places, 351 transitions, 2045 flow [2022-11-02 20:59:37,977 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2045, PETRI_PLACES=318, PETRI_TRANSITIONS=351} [2022-11-02 20:59:37,977 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 161 predicate places. [2022-11-02 20:59:37,977 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 351 transitions, 2045 flow [2022-11-02 20:59:37,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.45454545454545) internal successors, (2210), 22 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:37,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:59:37,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:38,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:38,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:59:38,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:59:38,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:38,207 INFO L85 PathProgramCache]: Analyzing trace with hash -243293540, now seen corresponding path program 2 times [2022-11-02 20:59:38,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:38,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93690878] [2022-11-02 20:59:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:38,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:59:40,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:40,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93690878] [2022-11-02 20:59:40,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93690878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:40,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258659145] [2022-11-02 20:59:40,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:59:40,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:40,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:40,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:40,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:59:40,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:59:40,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:40,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-02 20:59:40,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:40,700 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:59:40,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:59:40,717 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:59:40,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:59:41,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-02 20:59:42,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2022-11-02 20:59:43,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 21 [2022-11-02 20:59:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:59:43,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:44,131 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_265 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_265) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-02 20:59:44,140 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_265 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_265) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset|)) 4294967296)))) is different from false [2022-11-02 20:59:44,149 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_265 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_265) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-02 20:59:44,184 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:59:44,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-02 20:59:44,195 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:59:44,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-02 20:59:44,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-02 20:59:45,461 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:59:45,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-02 20:59:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 5 not checked. [2022-11-02 20:59:45,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258659145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:45,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:45,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 74 [2022-11-02 20:59:45,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358443715] [2022-11-02 20:59:45,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:45,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-02 20:59:45,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-02 20:59:45,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=4694, Unknown=3, NotChecked=420, Total=5402 [2022-11-02 20:59:45,478 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 172 [2022-11-02 20:59:45,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 351 transitions, 2045 flow. Second operand has 74 states, 74 states have (on average 86.22972972972973) internal successors, (6381), 74 states have internal predecessors, (6381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:45,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:59:45,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 172 [2022-11-02 20:59:45,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:00:19,091 INFO L130 PetriNetUnfolder]: 3287/13198 cut-off events. [2022-11-02 21:00:19,091 INFO L131 PetriNetUnfolder]: For 10070/10070 co-relation queries the response was YES. [2022-11-02 21:00:19,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32775 conditions, 13198 events. 3287/13198 cut-off events. For 10070/10070 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 127703 event pairs, 489 based on Foata normal form. 8/12943 useless extension candidates. Maximal degree in co-relation 24537. Up to 1713 conditions per place. [2022-11-02 21:00:19,260 INFO L137 encePairwiseOnDemand]: 133/172 looper letters, 454 selfloop transitions, 376 changer transitions 4/910 dead transitions. [2022-11-02 21:00:19,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 910 transitions, 6664 flow [2022-11-02 21:00:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-02 21:00:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-11-02 21:00:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 8027 transitions. [2022-11-02 21:00:19,275 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5128418093534373 [2022-11-02 21:00:19,275 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 8027 transitions. [2022-11-02 21:00:19,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 8027 transitions. [2022-11-02 21:00:19,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:00:19,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 8027 transitions. [2022-11-02 21:00:19,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 88.20879120879121) internal successors, (8027), 91 states have internal predecessors, (8027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:19,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 172.0) internal successors, (15824), 92 states have internal predecessors, (15824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:19,322 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 172.0) internal successors, (15824), 92 states have internal predecessors, (15824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:19,322 INFO L175 Difference]: Start difference. First operand has 318 places, 351 transitions, 2045 flow. Second operand 91 states and 8027 transitions. [2022-11-02 21:00:19,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 910 transitions, 6664 flow [2022-11-02 21:00:19,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 910 transitions, 6445 flow, removed 83 selfloop flow, removed 9 redundant places. [2022-11-02 21:00:19,443 INFO L231 Difference]: Finished difference. Result has 437 places, 599 transitions, 5019 flow [2022-11-02 21:00:19,444 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=5019, PETRI_PLACES=437, PETRI_TRANSITIONS=599} [2022-11-02 21:00:19,445 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 280 predicate places. [2022-11-02 21:00:19,445 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 599 transitions, 5019 flow [2022-11-02 21:00:19,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 86.22972972972973) internal successors, (6381), 74 states have internal predecessors, (6381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:19,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:00:19,448 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:19,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:19,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:19,674 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 21:00:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:19,675 INFO L85 PathProgramCache]: Analyzing trace with hash 397251088, now seen corresponding path program 3 times [2022-11-02 21:00:19,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:19,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223454068] [2022-11-02 21:00:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:19,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:23,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:23,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223454068] [2022-11-02 21:00:23,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223454068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:23,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575814468] [2022-11-02 21:00:23,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:00:23,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:23,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:23,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:23,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:00:23,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-02 21:00:23,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:23,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-02 21:00:23,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:23,351 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 21:00:23,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 21:00:23,369 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 21:00:23,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 21:00:24,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-02 21:00:24,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-11-02 21:00:25,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 21 [2022-11-02 21:00:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:00:26,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:27,092 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_319 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_319) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset|)) 4294967296)))) is different from false [2022-11-02 21:00:27,124 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_319 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_319) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2022-11-02 21:00:27,152 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:00:27,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-02 21:00:27,163 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:00:27,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-02 21:00:27,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-02 21:00:28,373 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 21:00:28,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-02 21:00:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 4 not checked. [2022-11-02 21:00:28,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575814468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:28,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:28,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 76 [2022-11-02 21:00:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661442763] [2022-11-02 21:00:28,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:28,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-02 21:00:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-02 21:00:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=5159, Unknown=2, NotChecked=290, Total=5700 [2022-11-02 21:00:28,385 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 172 [2022-11-02 21:00:28,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 599 transitions, 5019 flow. Second operand has 76 states, 76 states have (on average 87.17105263157895) internal successors, (6625), 76 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:28,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:00:28,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 172 [2022-11-02 21:00:28,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:02:12,391 INFO L130 PetriNetUnfolder]: 7264/29906 cut-off events. [2022-11-02 21:02:12,391 INFO L131 PetriNetUnfolder]: For 81837/81877 co-relation queries the response was YES. [2022-11-02 21:02:12,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98937 conditions, 29906 events. 7264/29906 cut-off events. For 81837/81877 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 341972 event pairs, 977 based on Foata normal form. 49/29345 useless extension candidates. Maximal degree in co-relation 91801. Up to 4233 conditions per place. [2022-11-02 21:02:13,032 INFO L137 encePairwiseOnDemand]: 129/172 looper letters, 1391 selfloop transitions, 926 changer transitions 42/2435 dead transitions. [2022-11-02 21:02:13,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 711 places, 2435 transitions, 24494 flow [2022-11-02 21:02:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2022-11-02 21:02:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2022-11-02 21:02:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 24476 transitions. [2022-11-02 21:02:13,064 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5174630021141648 [2022-11-02 21:02:13,064 INFO L72 ComplementDD]: Start complementDD. Operand 275 states and 24476 transitions. [2022-11-02 21:02:13,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 275 states and 24476 transitions. [2022-11-02 21:02:13,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:02:13,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 275 states and 24476 transitions. [2022-11-02 21:02:13,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 276 states, 275 states have (on average 89.00363636363636) internal successors, (24476), 275 states have internal predecessors, (24476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:13,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 276 states, 276 states have (on average 172.0) internal successors, (47472), 276 states have internal predecessors, (47472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:13,189 INFO L81 ComplementDD]: Finished complementDD. Result has 276 states, 276 states have (on average 172.0) internal successors, (47472), 276 states have internal predecessors, (47472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:13,189 INFO L175 Difference]: Start difference. First operand has 437 places, 599 transitions, 5019 flow. Second operand 275 states and 24476 transitions. [2022-11-02 21:02:13,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 711 places, 2435 transitions, 24494 flow [2022-11-02 21:02:13,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 690 places, 2435 transitions, 24038 flow, removed 163 selfloop flow, removed 21 redundant places. [2022-11-02 21:02:13,932 INFO L231 Difference]: Finished difference. Result has 802 places, 1411 transitions, 16363 flow [2022-11-02 21:02:13,933 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=4856, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=275, PETRI_FLOW=16363, PETRI_PLACES=802, PETRI_TRANSITIONS=1411} [2022-11-02 21:02:13,934 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 645 predicate places. [2022-11-02 21:02:13,934 INFO L495 AbstractCegarLoop]: Abstraction has has 802 places, 1411 transitions, 16363 flow [2022-11-02 21:02:13,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 87.17105263157895) internal successors, (6625), 76 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:13,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:02:13,937 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:13,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:14,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:02:14,158 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 21:02:14,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:14,159 INFO L85 PathProgramCache]: Analyzing trace with hash -453573317, now seen corresponding path program 2 times [2022-11-02 21:02:14,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:14,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099379725] [2022-11-02 21:02:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:14,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:14,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:14,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099379725] [2022-11-02 21:02:14,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099379725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:14,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008412689] [2022-11-02 21:02:14,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:02:14,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:14,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:14,447 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:14,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:02:14,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:02:14,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:14,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:02:14,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:14,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:15,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008412689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:15,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:02:15,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 21:02:15,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639242447] [2022-11-02 21:02:15,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:15,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 21:02:15,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:15,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 21:02:15,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:02:15,171 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-11-02 21:02:15,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 1411 transitions, 16363 flow. Second operand has 18 states, 18 states have (on average 148.72222222222223) internal successors, (2677), 18 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:15,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:02:15,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-11-02 21:02:15,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:02:33,028 INFO L130 PetriNetUnfolder]: 2507/27475 cut-off events. [2022-11-02 21:02:33,029 INFO L131 PetriNetUnfolder]: For 167417/167509 co-relation queries the response was YES. [2022-11-02 21:02:34,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94990 conditions, 27475 events. 2507/27475 cut-off events. For 167417/167509 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 305898 event pairs, 541 based on Foata normal form. 146/26842 useless extension candidates. Maximal degree in co-relation 93637. Up to 1968 conditions per place. [2022-11-02 21:02:34,124 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 556 selfloop transitions, 488 changer transitions 1/1909 dead transitions. [2022-11-02 21:02:34,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 1909 transitions, 25276 flow [2022-11-02 21:02:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 21:02:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-02 21:02:34,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3631 transitions. [2022-11-02 21:02:34,129 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8796027131782945 [2022-11-02 21:02:34,129 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3631 transitions. [2022-11-02 21:02:34,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3631 transitions. [2022-11-02 21:02:34,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:02:34,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3631 transitions. [2022-11-02 21:02:34,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 151.29166666666666) internal successors, (3631), 24 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:34,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 172.0) internal successors, (4300), 25 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:34,142 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 172.0) internal successors, (4300), 25 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:34,142 INFO L175 Difference]: Start difference. First operand has 802 places, 1411 transitions, 16363 flow. Second operand 24 states and 3631 transitions. [2022-11-02 21:02:34,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 1909 transitions, 25276 flow [2022-11-02 21:02:35,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 1909 transitions, 24378 flow, removed 380 selfloop flow, removed 16 redundant places. [2022-11-02 21:02:35,802 INFO L231 Difference]: Finished difference. Result has 804 places, 1679 transitions, 20876 flow [2022-11-02 21:02:35,803 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=15725, PETRI_DIFFERENCE_MINUEND_PLACES=777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=20876, PETRI_PLACES=804, PETRI_TRANSITIONS=1679} [2022-11-02 21:02:35,804 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 647 predicate places. [2022-11-02 21:02:35,804 INFO L495 AbstractCegarLoop]: Abstraction has has 804 places, 1679 transitions, 20876 flow [2022-11-02 21:02:35,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.72222222222223) internal successors, (2677), 18 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:35,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:02:35,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:35,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:36,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 21:02:36,006 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 21:02:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:36,006 INFO L85 PathProgramCache]: Analyzing trace with hash 62342287, now seen corresponding path program 1 times [2022-11-02 21:02:36,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:36,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436944523] [2022-11-02 21:02:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:36,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:39,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:39,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436944523] [2022-11-02 21:02:39,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436944523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:39,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367449561] [2022-11-02 21:02:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:39,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:39,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:39,508 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:39,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf4c9de-90a7-44a1-b38d-6fcf18e794bf/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:02:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:39,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-02 21:02:39,701 INFO L286 TraceCheckSpWp]: Computing forward predicates...