./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/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_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/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_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- 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 21:04:04,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:04:04,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:04:05,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:04:05,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:04:05,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:04:05,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:04:05,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:04:05,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:04:05,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:04:05,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:04:05,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:04:05,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:04:05,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:04:05,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:04:05,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:04:05,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:04:05,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:04:05,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:04:05,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:04:05,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:04:05,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:04:05,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:04:05,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:04:05,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:04:05,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:04:05,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:04:05,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:04:05,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:04:05,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:04:05,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:04:05,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:04:05,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:04:05,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:04:05,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:04:05,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:04:05,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:04:05,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:04:05,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:04:05,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:04:05,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:04:05,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:04:05,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:04:05,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:04:05,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:04:05,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:04:05,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:04:05,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:04:05,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:04:05,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:04:05,174 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:04:05,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:04:05,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:04:05,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:04:05,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:04:05,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:04:05,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:04:05,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:04:05,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:04:05,178 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:04:05,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:04:05,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:04:05,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:04:05,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:04:05,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:04:05,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:04:05,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:04:05,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:04:05,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:04:05,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:04:05,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:04:05,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:04:05,184 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:04:05,184 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:04:05,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:04:05,185 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_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2022-11-02 21:04:05,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:04:05,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:04:05,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:04:05,627 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:04:05,628 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:04:05,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread/stack-1.i [2022-11-02 21:04:05,728 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/data/d3366ff0e/e8bd7ad22a6d41a5bb4047e25c653d72/FLAG165919867 [2022-11-02 21:04:06,464 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:04:06,471 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/sv-benchmarks/c/pthread/stack-1.i [2022-11-02 21:04:06,492 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/data/d3366ff0e/e8bd7ad22a6d41a5bb4047e25c653d72/FLAG165919867 [2022-11-02 21:04:06,683 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/data/d3366ff0e/e8bd7ad22a6d41a5bb4047e25c653d72 [2022-11-02 21:04:06,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:04:06,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:04:06,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:04:06,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:04:06,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:04:06,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:04:06" (1/1) ... [2022-11-02 21:04:06,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a48ba17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:06, skipping insertion in model container [2022-11-02 21:04:06,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:04:06" (1/1) ... [2022-11-02 21:04:06,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:04:06,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:04:07,239 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_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-11-02 21:04:07,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:04:07,293 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:04:07,354 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_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-11-02 21:04:07,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:04:07,449 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:04:07,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07 WrapperNode [2022-11-02 21:04:07,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:04:07,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:04:07,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:04:07,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:04:07,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (1/1) ... [2022-11-02 21:04:07,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (1/1) ... [2022-11-02 21:04:07,546 INFO L138 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 154 [2022-11-02 21:04:07,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:04:07,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:04:07,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:04:07,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:04:07,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (1/1) ... [2022-11-02 21:04:07,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (1/1) ... [2022-11-02 21:04:07,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (1/1) ... [2022-11-02 21:04:07,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (1/1) ... [2022-11-02 21:04:07,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (1/1) ... [2022-11-02 21:04:07,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (1/1) ... [2022-11-02 21:04:07,577 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (1/1) ... [2022-11-02 21:04:07,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (1/1) ... [2022-11-02 21:04:07,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:04:07,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:04:07,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:04:07,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:04:07,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (1/1) ... [2022-11-02 21:04:07,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:04:07,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:07,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:04:07,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:04:07,709 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-02 21:04:07,710 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-02 21:04:07,710 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-02 21:04:07,710 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-02 21:04:07,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:04:07,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:04:07,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:04:07,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:04:07,711 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 21:04:07,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:04:07,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:04:07,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:04:07,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:04:07,714 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 21:04:07,921 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:04:07,924 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:04:08,219 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:04:08,230 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:04:08,230 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 21:04:08,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:04:08 BoogieIcfgContainer [2022-11-02 21:04:08,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:04:08,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:04:08,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:04:08,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:04:08,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:04:06" (1/3) ... [2022-11-02 21:04:08,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be7bb2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:04:08, skipping insertion in model container [2022-11-02 21:04:08,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:07" (2/3) ... [2022-11-02 21:04:08,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be7bb2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:04:08, skipping insertion in model container [2022-11-02 21:04:08,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:04:08" (3/3) ... [2022-11-02 21:04:08,245 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2022-11-02 21:04:08,255 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 21:04:08,264 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:04:08,264 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 21:04:08,264 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 21:04:08,376 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 21:04:08,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 176 transitions, 368 flow [2022-11-02 21:04:08,493 INFO L130 PetriNetUnfolder]: 10/174 cut-off events. [2022-11-02 21:04:08,493 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 21:04:08,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 174 events. 10/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 416 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-02 21:04:08,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 176 transitions, 368 flow [2022-11-02 21:04:08,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 164 transitions, 337 flow [2022-11-02 21:04:08,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:04:08,532 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;@56204353, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:04:08,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 21:04:08,583 INFO L130 PetriNetUnfolder]: 5/134 cut-off events. [2022-11-02 21:04:08,584 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 21:04:08,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:04:08,585 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] [2022-11-02 21:04:08,585 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 21:04:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:08,591 INFO L85 PathProgramCache]: Analyzing trace with hash -211887483, now seen corresponding path program 1 times [2022-11-02 21:04:08,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:08,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734210489] [2022-11-02 21:04:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:08,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:09,144 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 21:04:09,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:09,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734210489] [2022-11-02 21:04:09,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734210489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:09,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:09,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:09,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134188905] [2022-11-02 21:04:09,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:09,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:09,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:09,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:09,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:09,198 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 176 [2022-11-02 21:04:09,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 164 transitions, 337 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 21:04:09,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:04:09,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 176 [2022-11-02 21:04:09,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:04:09,423 INFO L130 PetriNetUnfolder]: 88/703 cut-off events. [2022-11-02 21:04:09,424 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-02 21:04:09,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 703 events. 88/703 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3086 event pairs, 32 based on Foata normal form. 69/706 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-11-02 21:04:09,434 INFO L137 encePairwiseOnDemand]: 166/176 looper letters, 20 selfloop transitions, 3 changer transitions 0/162 dead transitions. [2022-11-02 21:04:09,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 162 transitions, 385 flow [2022-11-02 21:04:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 21:04:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-11-02 21:04:09,452 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9299242424242424 [2022-11-02 21:04:09,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-11-02 21:04:09,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-11-02 21:04:09,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:04:09,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-11-02 21:04:09,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 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 21:04:09,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 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 21:04:09,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 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 21:04:09,480 INFO L175 Difference]: Start difference. First operand has 161 places, 164 transitions, 337 flow. Second operand 3 states and 491 transitions. [2022-11-02 21:04:09,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 162 transitions, 385 flow [2022-11-02 21:04:09,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 162 transitions, 377 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-02 21:04:09,509 INFO L231 Difference]: Finished difference. Result has 157 places, 156 transitions, 331 flow [2022-11-02 21:04:09,512 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=157, PETRI_TRANSITIONS=156} [2022-11-02 21:04:09,518 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, -4 predicate places. [2022-11-02 21:04:09,519 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 156 transitions, 331 flow [2022-11-02 21:04:09,520 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 21:04:09,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:04:09,520 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] [2022-11-02 21:04:09,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:04:09,521 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 21:04:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:09,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2060462298, now seen corresponding path program 1 times [2022-11-02 21:04:09,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:09,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57437651] [2022-11-02 21:04:09,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:09,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:09,890 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 21:04:09,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:09,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57437651] [2022-11-02 21:04:09,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57437651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:09,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:09,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:04:09,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913820846] [2022-11-02 21:04:09,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:09,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:04:09,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:09,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:04:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:04:09,902 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 176 [2022-11-02 21:04:09,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 156 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 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 21:04:09,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:04:09,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 176 [2022-11-02 21:04:09,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:04:10,136 INFO L130 PetriNetUnfolder]: 34/594 cut-off events. [2022-11-02 21:04:10,137 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-02 21:04:10,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 594 events. 34/594 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2032 event pairs, 11 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-11-02 21:04:10,145 INFO L137 encePairwiseOnDemand]: 171/176 looper letters, 16 selfloop transitions, 4 changer transitions 0/164 dead transitions. [2022-11-02 21:04:10,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 164 transitions, 392 flow [2022-11-02 21:04:10,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:04:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-02 21:04:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 645 transitions. [2022-11-02 21:04:10,151 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9161931818181818 [2022-11-02 21:04:10,152 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 645 transitions. [2022-11-02 21:04:10,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 645 transitions. [2022-11-02 21:04:10,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:04:10,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 645 transitions. [2022-11-02 21:04:10,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 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 21:04:10,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 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 21:04:10,161 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 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 21:04:10,161 INFO L175 Difference]: Start difference. First operand has 157 places, 156 transitions, 331 flow. Second operand 4 states and 645 transitions. [2022-11-02 21:04:10,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 164 transitions, 392 flow [2022-11-02 21:04:10,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 164 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:04:10,170 INFO L231 Difference]: Finished difference. Result has 161 places, 159 transitions, 356 flow [2022-11-02 21:04:10,171 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=356, PETRI_PLACES=161, PETRI_TRANSITIONS=159} [2022-11-02 21:04:10,172 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2022-11-02 21:04:10,172 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 159 transitions, 356 flow [2022-11-02 21:04:10,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 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 21:04:10,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:04:10,174 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] [2022-11-02 21:04:10,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:04:10,175 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 21:04:10,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:10,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1664854431, now seen corresponding path program 1 times [2022-11-02 21:04:10,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:10,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146852496] [2022-11-02 21:04:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:10,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,373 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 21:04:10,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146852496] [2022-11-02 21:04:10,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146852496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:10,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:10,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055657213] [2022-11-02 21:04:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:10,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:10,379 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 176 [2022-11-02 21:04:10,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 159 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 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 21:04:10,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:04:10,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 176 [2022-11-02 21:04:10,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:04:10,746 INFO L130 PetriNetUnfolder]: 127/1271 cut-off events. [2022-11-02 21:04:10,747 INFO L131 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-11-02 21:04:10,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1676 conditions, 1271 events. 127/1271 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6922 event pairs, 33 based on Foata normal form. 12/1209 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-11-02 21:04:10,803 INFO L137 encePairwiseOnDemand]: 170/176 looper letters, 25 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2022-11-02 21:04:10,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 171 transitions, 447 flow [2022-11-02 21:04:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 21:04:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2022-11-02 21:04:10,807 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9204545454545454 [2022-11-02 21:04:10,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2022-11-02 21:04:10,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2022-11-02 21:04:10,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:04:10,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2022-11-02 21:04:10,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 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 21:04:10,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 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 21:04:10,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 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 21:04:10,814 INFO L175 Difference]: Start difference. First operand has 161 places, 159 transitions, 356 flow. Second operand 3 states and 486 transitions. [2022-11-02 21:04:10,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 171 transitions, 447 flow [2022-11-02 21:04:10,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 171 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:04:10,825 INFO L231 Difference]: Finished difference. Result has 164 places, 163 transitions, 396 flow [2022-11-02 21:04:10,826 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=396, PETRI_PLACES=164, PETRI_TRANSITIONS=163} [2022-11-02 21:04:10,829 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 3 predicate places. [2022-11-02 21:04:10,829 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 163 transitions, 396 flow [2022-11-02 21:04:10,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 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 21:04:10,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:04:10,831 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] [2022-11-02 21:04:10,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:04:10,832 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 21:04:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:10,833 INFO L85 PathProgramCache]: Analyzing trace with hash 172146190, now seen corresponding path program 1 times [2022-11-02 21:04:10,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:10,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494374759] [2022-11-02 21:04:10,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:10,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:11,175 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 21:04:11,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:11,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494374759] [2022-11-02 21:04:11,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494374759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:11,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62638311] [2022-11-02 21:04:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:11,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:11,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:11,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:11,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:04:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:04:11,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:11,700 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 21:04:11,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:11,982 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 21:04:11,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62638311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:11,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:04:11,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 21:04:11,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409221256] [2022-11-02 21:04:11,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:04:11,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:04:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:04:11,992 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 176 [2022-11-02 21:04:11,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 163 transitions, 396 flow. Second operand has 10 states, 10 states have (on average 152.5) internal successors, (1525), 10 states have internal predecessors, (1525), 0 states have call successors, (0), 0 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 21:04:11,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:04:11,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 176 [2022-11-02 21:04:11,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:04:12,833 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L1009-->L1009-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][182], [Black: 192#(<= 1 ~top~0), Black: 178#(= ~top~0 0), 33#L946-2true, 190#true, 31#L1023-4true, 86#L1009-1true, 234#(<= ~top~0 0), Black: 183#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 186#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), t2Thread1of1ForFork1InUse]) [2022-11-02 21:04:12,837 INFO L383 tUnfolder$Statistics]: this new event has 189 ancestors and is cut-off event [2022-11-02 21:04:12,838 INFO L386 tUnfolder$Statistics]: existing Event has 161 ancestors and is cut-off event [2022-11-02 21:04:12,838 INFO L386 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-11-02 21:04:12,838 INFO L386 tUnfolder$Statistics]: existing Event has 169 ancestors and is cut-off event [2022-11-02 21:04:12,838 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([472] L1009-->L1011: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][183], [116#L1011true, Black: 190#true, Black: 178#(= ~top~0 0), 33#L946-2true, 31#L1023-4true, 192#(<= 1 ~top~0), Black: 183#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 186#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), 196#true, t2Thread1of1ForFork1InUse]) [2022-11-02 21:04:12,839 INFO L383 tUnfolder$Statistics]: this new event has 189 ancestors and is cut-off event [2022-11-02 21:04:12,839 INFO L386 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-11-02 21:04:12,839 INFO L386 tUnfolder$Statistics]: existing Event has 161 ancestors and is cut-off event [2022-11-02 21:04:12,839 INFO L386 tUnfolder$Statistics]: existing Event has 169 ancestors and is cut-off event [2022-11-02 21:04:13,024 INFO L130 PetriNetUnfolder]: 387/3002 cut-off events. [2022-11-02 21:04:13,027 INFO L131 PetriNetUnfolder]: For 1007/1065 co-relation queries the response was YES. [2022-11-02 21:04:13,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4482 conditions, 3002 events. 387/3002 cut-off events. For 1007/1065 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 21707 event pairs, 43 based on Foata normal form. 40/2882 useless extension candidates. Maximal degree in co-relation 3942. Up to 300 conditions per place. [2022-11-02 21:04:13,056 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 86 selfloop transitions, 46 changer transitions 1/273 dead transitions. [2022-11-02 21:04:13,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 273 transitions, 1078 flow [2022-11-02 21:04:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:04:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 21:04:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2831 transitions. [2022-11-02 21:04:13,065 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8936237373737373 [2022-11-02 21:04:13,065 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2831 transitions. [2022-11-02 21:04:13,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2831 transitions. [2022-11-02 21:04:13,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:04:13,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2831 transitions. [2022-11-02 21:04:13,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 157.27777777777777) internal successors, (2831), 18 states have internal predecessors, (2831), 0 states have call successors, (0), 0 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 21:04:13,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 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 21:04:13,089 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 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 21:04:13,089 INFO L175 Difference]: Start difference. First operand has 164 places, 163 transitions, 396 flow. Second operand 18 states and 2831 transitions. [2022-11-02 21:04:13,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 273 transitions, 1078 flow [2022-11-02 21:04:13,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 273 transitions, 1016 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-02 21:04:13,104 INFO L231 Difference]: Finished difference. Result has 185 places, 218 transitions, 767 flow [2022-11-02 21:04:13,105 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=767, PETRI_PLACES=185, PETRI_TRANSITIONS=218} [2022-11-02 21:04:13,106 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 24 predicate places. [2022-11-02 21:04:13,107 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 218 transitions, 767 flow [2022-11-02 21:04:13,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.5) internal successors, (1525), 10 states have internal predecessors, (1525), 0 states have call successors, (0), 0 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 21:04:13,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:04:13,108 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] [2022-11-02 21:04:13,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 21:04:13,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:13,330 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 21:04:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:13,331 INFO L85 PathProgramCache]: Analyzing trace with hash 754166100, now seen corresponding path program 1 times [2022-11-02 21:04:13,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:13,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082211734] [2022-11-02 21:04:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:13,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:13,589 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 21:04:13,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:13,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082211734] [2022-11-02 21:04:13,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082211734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:13,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:13,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152360179] [2022-11-02 21:04:13,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:13,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:13,593 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 176 [2022-11-02 21:04:13,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 218 transitions, 767 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 21:04:13,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:04:13,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 176 [2022-11-02 21:04:13,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:04:13,862 INFO L130 PetriNetUnfolder]: 54/1111 cut-off events. [2022-11-02 21:04:13,862 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-02 21:04:13,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 1111 events. 54/1111 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4871 event pairs, 9 based on Foata normal form. 18/1086 useless extension candidates. Maximal degree in co-relation 1132. Up to 51 conditions per place. [2022-11-02 21:04:13,871 INFO L137 encePairwiseOnDemand]: 172/176 looper letters, 12 selfloop transitions, 4 changer transitions 0/177 dead transitions. [2022-11-02 21:04:13,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 177 transitions, 544 flow [2022-11-02 21:04:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 21:04:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2022-11-02 21:04:13,873 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9090909090909091 [2022-11-02 21:04:13,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2022-11-02 21:04:13,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2022-11-02 21:04:13,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:04:13,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2022-11-02 21:04:13,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 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 21:04:13,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 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 21:04:13,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 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 21:04:13,878 INFO L175 Difference]: Start difference. First operand has 185 places, 218 transitions, 767 flow. Second operand 3 states and 480 transitions. [2022-11-02 21:04:13,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 177 transitions, 544 flow [2022-11-02 21:04:13,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 177 transitions, 522 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-02 21:04:13,885 INFO L231 Difference]: Finished difference. Result has 175 places, 175 transitions, 491 flow [2022-11-02 21:04:13,886 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=491, PETRI_PLACES=175, PETRI_TRANSITIONS=175} [2022-11-02 21:04:13,887 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 14 predicate places. [2022-11-02 21:04:13,887 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 175 transitions, 491 flow [2022-11-02 21:04:13,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 21:04:13,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:04:13,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:13,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:04:13,889 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 21:04:13,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:13,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1068928020, now seen corresponding path program 1 times [2022-11-02 21:04:13,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:13,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819997133] [2022-11-02 21:04:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:13,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:16,192 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 21:04:16,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:16,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819997133] [2022-11-02 21:04:16,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819997133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:16,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:16,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-02 21:04:16,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160543775] [2022-11-02 21:04:16,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:16,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 21:04:16,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:16,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 21:04:16,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:04:16,198 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 176 [2022-11-02 21:04:16,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 175 transitions, 491 flow. Second operand has 24 states, 24 states have (on average 99.54166666666667) internal successors, (2389), 24 states have internal predecessors, (2389), 0 states have call successors, (0), 0 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 21:04:16,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:04:16,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 176 [2022-11-02 21:04:16,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:04:21,564 INFO L130 PetriNetUnfolder]: 1122/4497 cut-off events. [2022-11-02 21:04:21,564 INFO L131 PetriNetUnfolder]: For 907/907 co-relation queries the response was YES. [2022-11-02 21:04:21,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8479 conditions, 4497 events. 1122/4497 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 31889 event pairs, 171 based on Foata normal form. 20/4368 useless extension candidates. Maximal degree in co-relation 5127. Up to 1458 conditions per place. [2022-11-02 21:04:21,608 INFO L137 encePairwiseOnDemand]: 139/176 looper letters, 249 selfloop transitions, 59 changer transitions 33/427 dead transitions. [2022-11-02 21:04:21,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 427 transitions, 1859 flow [2022-11-02 21:04:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 21:04:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-02 21:04:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4579 transitions. [2022-11-02 21:04:21,622 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5912964876033058 [2022-11-02 21:04:21,623 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4579 transitions. [2022-11-02 21:04:21,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4579 transitions. [2022-11-02 21:04:21,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:04:21,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4579 transitions. [2022-11-02 21:04:21,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 104.06818181818181) internal successors, (4579), 44 states have internal predecessors, (4579), 0 states have call successors, (0), 0 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 21:04:21,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 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 21:04:21,661 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 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 21:04:21,661 INFO L175 Difference]: Start difference. First operand has 175 places, 175 transitions, 491 flow. Second operand 44 states and 4579 transitions. [2022-11-02 21:04:21,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 427 transitions, 1859 flow [2022-11-02 21:04:21,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 427 transitions, 1855 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:04:21,677 INFO L231 Difference]: Finished difference. Result has 256 places, 230 transitions, 974 flow [2022-11-02 21:04:21,678 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=974, PETRI_PLACES=256, PETRI_TRANSITIONS=230} [2022-11-02 21:04:21,679 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 95 predicate places. [2022-11-02 21:04:21,680 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 230 transitions, 974 flow [2022-11-02 21:04:21,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 99.54166666666667) internal successors, (2389), 24 states have internal predecessors, (2389), 0 states have call successors, (0), 0 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 21:04:21,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:04:21,682 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, 1, 1, 1, 1] [2022-11-02 21:04:21,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 21:04:21,682 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 21:04:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:21,683 INFO L85 PathProgramCache]: Analyzing trace with hash 401984948, now seen corresponding path program 2 times [2022-11-02 21:04:21,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:21,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666396526] [2022-11-02 21:04:21,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:21,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:24,587 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 21:04:24,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:24,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666396526] [2022-11-02 21:04:24,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666396526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:24,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:24,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-11-02 21:04:24,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031961145] [2022-11-02 21:04:24,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:24,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 21:04:24,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:24,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 21:04:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-11-02 21:04:24,594 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 176 [2022-11-02 21:04:24,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 230 transitions, 974 flow. Second operand has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 0 states have call successors, (0), 0 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 21:04:24,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:04:24,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 176 [2022-11-02 21:04:24,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:04:31,177 INFO L130 PetriNetUnfolder]: 1758/7110 cut-off events. [2022-11-02 21:04:31,177 INFO L131 PetriNetUnfolder]: For 5414/5417 co-relation queries the response was YES. [2022-11-02 21:04:31,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16637 conditions, 7110 events. 1758/7110 cut-off events. For 5414/5417 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 54615 event pairs, 448 based on Foata normal form. 15/6993 useless extension candidates. Maximal degree in co-relation 11020. Up to 2353 conditions per place. [2022-11-02 21:04:31,284 INFO L137 encePairwiseOnDemand]: 138/176 looper letters, 291 selfloop transitions, 61 changer transitions 26/454 dead transitions. [2022-11-02 21:04:31,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 454 transitions, 2771 flow [2022-11-02 21:04:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-02 21:04:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-02 21:04:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3181 transitions. [2022-11-02 21:04:31,297 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5163961038961039 [2022-11-02 21:04:31,298 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3181 transitions. [2022-11-02 21:04:31,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3181 transitions. [2022-11-02 21:04:31,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:04:31,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3181 transitions. [2022-11-02 21:04:31,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.88571428571429) internal successors, (3181), 35 states have internal predecessors, (3181), 0 states have call successors, (0), 0 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 21:04:31,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 176.0) internal successors, (6336), 36 states have internal predecessors, (6336), 0 states have call successors, (0), 0 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 21:04:31,342 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 176.0) internal successors, (6336), 36 states have internal predecessors, (6336), 0 states have call successors, (0), 0 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 21:04:31,342 INFO L175 Difference]: Start difference. First operand has 256 places, 230 transitions, 974 flow. Second operand 35 states and 3181 transitions. [2022-11-02 21:04:31,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 454 transitions, 2771 flow [2022-11-02 21:04:31,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 454 transitions, 2759 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-02 21:04:31,381 INFO L231 Difference]: Finished difference. Result has 304 places, 265 transitions, 1449 flow [2022-11-02 21:04:31,382 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1449, PETRI_PLACES=304, PETRI_TRANSITIONS=265} [2022-11-02 21:04:31,382 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 143 predicate places. [2022-11-02 21:04:31,383 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 265 transitions, 1449 flow [2022-11-02 21:04:31,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 0 states have call successors, (0), 0 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 21:04:31,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:04:31,384 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, 1, 1, 1, 1] [2022-11-02 21:04:31,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 21:04:31,385 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 21:04:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:31,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1187351346, now seen corresponding path program 3 times [2022-11-02 21:04:31,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:31,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872035028] [2022-11-02 21:04:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:31,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:33,348 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 21:04:33,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872035028] [2022-11-02 21:04:33,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872035028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:33,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:33,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-11-02 21:04:33,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647375648] [2022-11-02 21:04:33,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:33,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 21:04:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:33,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 21:04:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-11-02 21:04:33,354 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 176 [2022-11-02 21:04:33,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 265 transitions, 1449 flow. Second operand has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 0 states have call successors, (0), 0 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 21:04:33,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:04:33,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 176 [2022-11-02 21:04:33,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:04:39,148 INFO L130 PetriNetUnfolder]: 2029/8293 cut-off events. [2022-11-02 21:04:39,148 INFO L131 PetriNetUnfolder]: For 8659/8662 co-relation queries the response was YES. [2022-11-02 21:04:39,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20371 conditions, 8293 events. 2029/8293 cut-off events. For 8659/8662 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 67639 event pairs, 336 based on Foata normal form. 13/8152 useless extension candidates. Maximal degree in co-relation 12386. Up to 2262 conditions per place. [2022-11-02 21:04:39,274 INFO L137 encePairwiseOnDemand]: 140/176 looper letters, 293 selfloop transitions, 77 changer transitions 26/472 dead transitions. [2022-11-02 21:04:39,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 472 transitions, 3227 flow [2022-11-02 21:04:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 21:04:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-02 21:04:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3098 transitions. [2022-11-02 21:04:39,283 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5177139037433155 [2022-11-02 21:04:39,284 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3098 transitions. [2022-11-02 21:04:39,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3098 transitions. [2022-11-02 21:04:39,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:04:39,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3098 transitions. [2022-11-02 21:04:39,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 91.11764705882354) internal successors, (3098), 34 states have internal predecessors, (3098), 0 states have call successors, (0), 0 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 21:04:39,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 176.0) internal successors, (6160), 35 states have internal predecessors, (6160), 0 states have call successors, (0), 0 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 21:04:39,311 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 176.0) internal successors, (6160), 35 states have internal predecessors, (6160), 0 states have call successors, (0), 0 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 21:04:39,311 INFO L175 Difference]: Start difference. First operand has 304 places, 265 transitions, 1449 flow. Second operand 34 states and 3098 transitions. [2022-11-02 21:04:39,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 472 transitions, 3227 flow [2022-11-02 21:04:39,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 472 transitions, 3175 flow, removed 7 selfloop flow, removed 14 redundant places. [2022-11-02 21:04:39,369 INFO L231 Difference]: Finished difference. Result has 338 places, 283 transitions, 1836 flow [2022-11-02 21:04:39,370 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1836, PETRI_PLACES=338, PETRI_TRANSITIONS=283} [2022-11-02 21:04:39,371 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 177 predicate places. [2022-11-02 21:04:39,371 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 283 transitions, 1836 flow [2022-11-02 21:04:39,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 0 states have call successors, (0), 0 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 21:04:39,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:04:39,373 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, 1, 1, 1, 1] [2022-11-02 21:04:39,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 21:04:39,374 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 21:04:39,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2012317005, now seen corresponding path program 1 times [2022-11-02 21:04:39,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:39,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578933159] [2022-11-02 21:04:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:39,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:41,532 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 21:04:41,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:41,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578933159] [2022-11-02 21:04:41,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578933159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:41,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440254185] [2022-11-02 21:04:41,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:41,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:41,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:41,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:41,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:04:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-02 21:04:41,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:43,564 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 22 treesize of output 17 [2022-11-02 21:04:45,202 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 44 treesize of output 23 [2022-11-02 21:04:45,494 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 21:04:45,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:46,550 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 21:04:47,384 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 21:04:47,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440254185] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:47,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:47,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [26, 26] total 68 [2022-11-02 21:04:47,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978863019] [2022-11-02 21:04:47,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:47,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 21:04:47,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:47,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 21:04:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4315, Unknown=0, NotChecked=0, Total=4556 [2022-11-02 21:04:47,400 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 176 [2022-11-02 21:04:47,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 283 transitions, 1836 flow. Second operand has 22 states, 22 states have (on average 100.63636363636364) internal successors, (2214), 22 states have internal predecessors, (2214), 0 states have call successors, (0), 0 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 21:04:47,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:04:47,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 176 [2022-11-02 21:04:47,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:04:59,370 INFO L130 PetriNetUnfolder]: 2737/11232 cut-off events. [2022-11-02 21:04:59,371 INFO L131 PetriNetUnfolder]: For 15474/15477 co-relation queries the response was YES. [2022-11-02 21:04:59,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28440 conditions, 11232 events. 2737/11232 cut-off events. For 15474/15477 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 100586 event pairs, 411 based on Foata normal form. 9/11020 useless extension candidates. Maximal degree in co-relation 15396. Up to 1518 conditions per place. [2022-11-02 21:04:59,552 INFO L137 encePairwiseOnDemand]: 143/176 looper letters, 281 selfloop transitions, 210 changer transitions 3/580 dead transitions. [2022-11-02 21:04:59,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 580 transitions, 4357 flow [2022-11-02 21:04:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-02 21:04:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-02 21:04:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 6634 transitions. [2022-11-02 21:04:59,571 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5798951048951049 [2022-11-02 21:04:59,571 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 6634 transitions. [2022-11-02 21:04:59,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 6634 transitions. [2022-11-02 21:04:59,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:04:59,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 6634 transitions. [2022-11-02 21:04:59,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 102.06153846153846) internal successors, (6634), 65 states have internal predecessors, (6634), 0 states have call successors, (0), 0 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 21:04:59,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 176.0) internal successors, (11616), 66 states have internal predecessors, (11616), 0 states have call successors, (0), 0 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 21:04:59,616 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 176.0) internal successors, (11616), 66 states have internal predecessors, (11616), 0 states have call successors, (0), 0 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 21:04:59,617 INFO L175 Difference]: Start difference. First operand has 338 places, 283 transitions, 1836 flow. Second operand 65 states and 6634 transitions. [2022-11-02 21:04:59,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 580 transitions, 4357 flow [2022-11-02 21:04:59,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 580 transitions, 4291 flow, removed 8 selfloop flow, removed 18 redundant places. [2022-11-02 21:04:59,720 INFO L231 Difference]: Finished difference. Result has 401 places, 402 transitions, 3325 flow [2022-11-02 21:04:59,721 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=3325, PETRI_PLACES=401, PETRI_TRANSITIONS=402} [2022-11-02 21:04:59,722 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 240 predicate places. [2022-11-02 21:04:59,723 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 402 transitions, 3325 flow [2022-11-02 21:04:59,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.63636363636364) internal successors, (2214), 22 states have internal predecessors, (2214), 0 states have call successors, (0), 0 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 21:04:59,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:04:59,724 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, 1, 1, 1, 1] [2022-11-02 21:04:59,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:59,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:59,938 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 21:04:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1575078097, now seen corresponding path program 2 times [2022-11-02 21:04:59,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:59,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489283226] [2022-11-02 21:04:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:59,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:02,944 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 21:05:02,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:02,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489283226] [2022-11-02 21:05:02,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489283226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:02,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111537021] [2022-11-02 21:05:02,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:05:02,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:02,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:02,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:02,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:05:03,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 21:05:03,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-02 21:05:03,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:03,283 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 21:05:03,284 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 21:05:03,301 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 21:05:03,302 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 21:05:04,564 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 22 treesize of output 17 [2022-11-02 21:05:04,688 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 59 treesize of output 54 [2022-11-02 21:05:05,730 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 64 treesize of output 23 [2022-11-02 21:05:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:05:05,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:06,789 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_244 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_244) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-02 21:05:06,817 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:05:06,817 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 21:05:06,829 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:05:06,830 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 21:05:06,836 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 21:05:08,339 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 21:05:08,340 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 21:05:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2022-11-02 21:05:08,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111537021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:08,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:08,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 75 [2022-11-02 21:05:08,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206881899] [2022-11-02 21:05:08,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:08,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-02 21:05:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:08,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-02 21:05:08,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=5093, Unknown=1, NotChecked=144, Total=5550 [2022-11-02 21:05:08,366 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 176 [2022-11-02 21:05:08,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 402 transitions, 3325 flow. Second operand has 75 states, 75 states have (on average 87.37333333333333) internal successors, (6553), 75 states have internal predecessors, (6553), 0 states have call successors, (0), 0 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 21:05:08,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:08,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 176 [2022-11-02 21:05:08,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:06:36,882 INFO L130 PetriNetUnfolder]: 4049/16643 cut-off events. [2022-11-02 21:06:36,882 INFO L131 PetriNetUnfolder]: For 34682/34689 co-relation queries the response was YES. [2022-11-02 21:06:37,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47291 conditions, 16643 events. 4049/16643 cut-off events. For 34682/34689 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 159250 event pairs, 220 based on Foata normal form. 44/16383 useless extension candidates. Maximal degree in co-relation 28651. Up to 2316 conditions per place. [2022-11-02 21:06:37,169 INFO L137 encePairwiseOnDemand]: 131/176 looper letters, 528 selfloop transitions, 575 changer transitions 25/1204 dead transitions. [2022-11-02 21:06:37,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1204 transitions, 10337 flow [2022-11-02 21:06:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-11-02 21:06:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2022-11-02 21:06:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 16818 transitions. [2022-11-02 21:06:37,199 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5002974773917183 [2022-11-02 21:06:37,200 INFO L72 ComplementDD]: Start complementDD. Operand 191 states and 16818 transitions. [2022-11-02 21:06:37,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 191 states and 16818 transitions. [2022-11-02 21:06:37,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:06:37,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 191 states and 16818 transitions. [2022-11-02 21:06:37,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 192 states, 191 states have (on average 88.05235602094241) internal successors, (16818), 191 states have internal predecessors, (16818), 0 states have call successors, (0), 0 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 21:06:37,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 192 states, 192 states have (on average 176.0) internal successors, (33792), 192 states have internal predecessors, (33792), 0 states have call successors, (0), 0 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 21:06:37,302 INFO L81 ComplementDD]: Finished complementDD. Result has 192 states, 192 states have (on average 176.0) internal successors, (33792), 192 states have internal predecessors, (33792), 0 states have call successors, (0), 0 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 21:06:37,302 INFO L175 Difference]: Start difference. First operand has 401 places, 402 transitions, 3325 flow. Second operand 191 states and 16818 transitions. [2022-11-02 21:06:37,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 1204 transitions, 10337 flow [2022-11-02 21:06:37,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 1204 transitions, 9008 flow, removed 633 selfloop flow, removed 9 redundant places. [2022-11-02 21:06:37,668 INFO L231 Difference]: Finished difference. Result has 607 places, 758 transitions, 6726 flow [2022-11-02 21:06:37,669 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=191, PETRI_FLOW=6726, PETRI_PLACES=607, PETRI_TRANSITIONS=758} [2022-11-02 21:06:37,670 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 446 predicate places. [2022-11-02 21:06:37,670 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 758 transitions, 6726 flow [2022-11-02 21:06:37,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 87.37333333333333) internal successors, (6553), 75 states have internal predecessors, (6553), 0 states have call successors, (0), 0 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 21:06:37,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:06:37,673 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:06:37,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:37,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:37,886 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 21:06:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:37,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1157067499, now seen corresponding path program 1 times [2022-11-02 21:06:37,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:37,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143872944] [2022-11-02 21:06:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:37,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:06:38,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:38,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143872944] [2022-11-02 21:06:38,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143872944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:38,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113905955] [2022-11-02 21:06:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:38,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:38,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:38,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:38,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:06:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:06:38,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-02 21:06:38,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:06:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-02 21:06:39,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113905955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:06:39,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:06:39,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-11-02 21:06:39,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541512790] [2022-11-02 21:06:39,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:06:39,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:06:39,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:39,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:06:39,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:06:39,297 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 176 [2022-11-02 21:06:39,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 758 transitions, 6726 flow. Second operand has 12 states, 12 states have (on average 151.5) internal successors, (1818), 12 states have internal predecessors, (1818), 0 states have call successors, (0), 0 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 21:06:39,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:06:39,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 176 [2022-11-02 21:06:39,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:06:44,803 INFO L130 PetriNetUnfolder]: 1037/10761 cut-off events. [2022-11-02 21:06:44,803 INFO L131 PetriNetUnfolder]: For 38025/38363 co-relation queries the response was YES. [2022-11-02 21:06:44,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32923 conditions, 10761 events. 1037/10761 cut-off events. For 38025/38363 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 100267 event pairs, 268 based on Foata normal form. 22/10485 useless extension candidates. Maximal degree in co-relation 27109. Up to 763 conditions per place. [2022-11-02 21:06:44,999 INFO L137 encePairwiseOnDemand]: 166/176 looper letters, 189 selfloop transitions, 141 changer transitions 3/862 dead transitions. [2022-11-02 21:06:44,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 862 transitions, 8352 flow [2022-11-02 21:06:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:06:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 21:06:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2756 transitions. [2022-11-02 21:06:45,004 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8699494949494949 [2022-11-02 21:06:45,004 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2756 transitions. [2022-11-02 21:06:45,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2756 transitions. [2022-11-02 21:06:45,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:06:45,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2756 transitions. [2022-11-02 21:06:45,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.11111111111111) internal successors, (2756), 18 states have internal predecessors, (2756), 0 states have call successors, (0), 0 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 21:06:45,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 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 21:06:45,017 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 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 21:06:45,017 INFO L175 Difference]: Start difference. First operand has 607 places, 758 transitions, 6726 flow. Second operand 18 states and 2756 transitions. [2022-11-02 21:06:45,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 862 transitions, 8352 flow [2022-11-02 21:06:45,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 862 transitions, 7223 flow, removed 368 selfloop flow, removed 31 redundant places. [2022-11-02 21:06:45,468 INFO L231 Difference]: Finished difference. Result has 594 places, 789 transitions, 6453 flow [2022-11-02 21:06:45,470 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=5669, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6453, PETRI_PLACES=594, PETRI_TRANSITIONS=789} [2022-11-02 21:06:45,471 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 433 predicate places. [2022-11-02 21:06:45,471 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 789 transitions, 6453 flow [2022-11-02 21:06:45,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.5) internal successors, (1818), 12 states have internal predecessors, (1818), 0 states have call successors, (0), 0 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 21:06:45,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:06:45,472 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, 1, 1, 1, 1] [2022-11-02 21:06:45,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:45,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 21:06:45,694 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 21:06:45,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:45,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1324549368, now seen corresponding path program 2 times [2022-11-02 21:06:45,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:45,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316313325] [2022-11-02 21:06:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:45,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:46,045 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 21:06:46,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:46,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316313325] [2022-11-02 21:06:46,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316313325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:46,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336187945] [2022-11-02 21:06:46,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:06:46,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:46,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:46,050 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:46,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:06:46,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:06:46,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:06:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:06:46,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:46,621 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 21:06:46,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:06:47,138 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 21:06:47,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336187945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:06:47,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:06:47,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-02 21:06:47,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168332621] [2022-11-02 21:06:47,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:06:47,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 21:06:47,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:47,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 21:06:47,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:06:47,147 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 176 [2022-11-02 21:06:47,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 789 transitions, 6453 flow. Second operand has 13 states, 13 states have (on average 152.84615384615384) internal successors, (1987), 13 states have internal predecessors, (1987), 0 states have call successors, (0), 0 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 21:06:47,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:06:47,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 176 [2022-11-02 21:06:47,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:06:54,271 INFO L130 PetriNetUnfolder]: 1230/13140 cut-off events. [2022-11-02 21:06:54,271 INFO L131 PetriNetUnfolder]: For 48447/48865 co-relation queries the response was YES. [2022-11-02 21:06:54,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38174 conditions, 13140 events. 1230/13140 cut-off events. For 48447/48865 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 125122 event pairs, 320 based on Foata normal form. 35/12803 useless extension candidates. Maximal degree in co-relation 34257. Up to 1115 conditions per place. [2022-11-02 21:06:54,562 INFO L137 encePairwiseOnDemand]: 169/176 looper letters, 252 selfloop transitions, 134 changer transitions 1/929 dead transitions. [2022-11-02 21:06:54,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 929 transitions, 8515 flow [2022-11-02 21:06:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:06:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 21:06:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2795 transitions. [2022-11-02 21:06:54,570 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.882260101010101 [2022-11-02 21:06:54,570 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2795 transitions. [2022-11-02 21:06:54,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2795 transitions. [2022-11-02 21:06:54,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:06:54,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2795 transitions. [2022-11-02 21:06:54,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.27777777777777) internal successors, (2795), 18 states have internal predecessors, (2795), 0 states have call successors, (0), 0 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 21:06:54,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 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 21:06:54,585 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 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 21:06:54,586 INFO L175 Difference]: Start difference. First operand has 594 places, 789 transitions, 6453 flow. Second operand 18 states and 2795 transitions. [2022-11-02 21:06:54,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 929 transitions, 8515 flow [2022-11-02 21:06:54,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 929 transitions, 8411 flow, removed 46 selfloop flow, removed 3 redundant places. [2022-11-02 21:06:55,016 INFO L231 Difference]: Finished difference. Result has 610 places, 828 transitions, 7088 flow [2022-11-02 21:06:55,018 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=6363, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7088, PETRI_PLACES=610, PETRI_TRANSITIONS=828} [2022-11-02 21:06:55,018 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, 449 predicate places. [2022-11-02 21:06:55,019 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 828 transitions, 7088 flow [2022-11-02 21:06:55,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 152.84615384615384) internal successors, (1987), 13 states have internal predecessors, (1987), 0 states have call successors, (0), 0 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 21:06:55,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:06:55,020 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, 1, 1, 1, 1] [2022-11-02 21:06:55,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-02 21:06:55,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 21:06:55,234 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 21:06:55,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:55,235 INFO L85 PathProgramCache]: Analyzing trace with hash 661608962, now seen corresponding path program 1 times [2022-11-02 21:06:55,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:55,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355782093] [2022-11-02 21:06:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:55,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:58,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:58,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355782093] [2022-11-02 21:06:58,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355782093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:58,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59434865] [2022-11-02 21:06:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:58,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:58,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:58,510 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:58,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e1b030-efdc-48c3-a5ba-f1e363ff1cc4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:06:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:58,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-02 21:06:58,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:00,134 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 22 treesize of output 17 [2022-11-02 21:07:01,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:07:01,720 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 52 treesize of output 38 [2022-11-02 21:07:04,226 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 44 treesize of output 23 [2022-11-02 21:07:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:04,564 INFO L328 TraceCheckSpWp]: Computing backward predicates...