./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:49:03,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:49:03,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:49:03,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:49:03,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:49:03,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:49:03,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:49:03,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:49:03,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:49:03,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:49:03,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:49:03,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:49:03,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:49:03,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:49:03,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:49:03,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:49:03,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:49:03,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:49:03,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:49:03,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:49:03,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:49:03,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:49:03,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:49:03,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:49:03,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:49:03,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:49:03,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:49:03,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:49:03,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:49:03,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:49:03,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:49:03,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:49:03,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:49:03,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:49:03,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:49:03,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:49:03,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:49:03,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:49:03,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:49:03,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:49:03,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:49:03,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:49:03,691 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:49:03,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:49:03,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:49:03,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:49:03,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:49:03,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:49:03,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:49:03,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:49:03,693 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:49:03,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:49:03,693 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:49:03,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:49:03,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:49:03,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:49:03,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:49:03,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:49:03,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:49:03,695 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:49:03,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:49:03,695 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:49:03,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:49:03,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:49:03,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:49:03,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:49:03,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:49:03,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:49:03,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:49:03,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:49:03,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:49:03,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:49:03,697 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:49:03,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:49:03,697 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:49:03,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:49:03,698 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:49:03,698 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2022-12-13 11:49:03,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:49:03,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:49:03,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:49:03,898 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:49:03,898 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:49:03,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/stack_longest-2.i [2022-12-13 11:49:06,518 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:49:06,754 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:49:06,754 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/sv-benchmarks/c/pthread/stack_longest-2.i [2022-12-13 11:49:06,767 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/data/ab36b65ec/5b44eecad4964e42b086811ee519b099/FLAG765f2d817 [2022-12-13 11:49:06,781 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/data/ab36b65ec/5b44eecad4964e42b086811ee519b099 [2022-12-13 11:49:06,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:49:06,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:49:06,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:49:06,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:49:06,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:49:06,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:49:06" (1/1) ... [2022-12-13 11:49:06,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4197ced2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:06, skipping insertion in model container [2022-12-13 11:49:06,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:49:06" (1/1) ... [2022-12-13 11:49:06,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:49:06,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:49:07,097 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-12-13 11:49:07,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:49:07,125 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:49:07,159 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-12-13 11:49:07,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:49:07,199 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:49:07,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07 WrapperNode [2022-12-13 11:49:07,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:49:07,200 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:49:07,200 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:49:07,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:49:07,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (1/1) ... [2022-12-13 11:49:07,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (1/1) ... [2022-12-13 11:49:07,235 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-12-13 11:49:07,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:49:07,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:49:07,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:49:07,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:49:07,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (1/1) ... [2022-12-13 11:49:07,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (1/1) ... [2022-12-13 11:49:07,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (1/1) ... [2022-12-13 11:49:07,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (1/1) ... [2022-12-13 11:49:07,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (1/1) ... [2022-12-13 11:49:07,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (1/1) ... [2022-12-13 11:49:07,263 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (1/1) ... [2022-12-13 11:49:07,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (1/1) ... [2022-12-13 11:49:07,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:49:07,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:49:07,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:49:07,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:49:07,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (1/1) ... [2022-12-13 11:49:07,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:49:07,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:07,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:49:07,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:49:07,337 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 11:49:07,337 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 11:49:07,337 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 11:49:07,337 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 11:49:07,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:49:07,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:49:07,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:49:07,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:49:07,338 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 11:49:07,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:49:07,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:49:07,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:49:07,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:49:07,340 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:49:07,461 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:49:07,463 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:49:07,663 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:49:07,671 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:49:07,672 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 11:49:07,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:49:07 BoogieIcfgContainer [2022-12-13 11:49:07,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:49:07,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:49:07,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:49:07,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:49:07,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:49:06" (1/3) ... [2022-12-13 11:49:07,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a98a5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:49:07, skipping insertion in model container [2022-12-13 11:49:07,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:07" (2/3) ... [2022-12-13 11:49:07,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a98a5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:49:07, skipping insertion in model container [2022-12-13 11:49:07,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:49:07" (3/3) ... [2022-12-13 11:49:07,683 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-12-13 11:49:07,692 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 11:49:07,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:49:07,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 11:49:07,702 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:49:07,779 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 11:49:07,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2022-12-13 11:49:07,878 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2022-12-13 11:49:07,878 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:49:07,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 407 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-12-13 11:49:07,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2022-12-13 11:49:07,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 158 transitions, 325 flow [2022-12-13 11:49:07,891 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:49:07,899 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 158 transitions, 325 flow [2022-12-13 11:49:07,901 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 158 transitions, 325 flow [2022-12-13 11:49:07,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 325 flow [2022-12-13 11:49:07,926 INFO L130 PetriNetUnfolder]: 10/158 cut-off events. [2022-12-13 11:49:07,926 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:49:07,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 158 events. 10/158 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 322 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-12-13 11:49:07,930 INFO L119 LiptonReduction]: Number of co-enabled transitions 8324 [2022-12-13 11:49:10,688 INFO L134 LiptonReduction]: Checked pairs total: 10336 [2022-12-13 11:49:10,688 INFO L136 LiptonReduction]: Total number of compositions: 150 [2022-12-13 11:49:10,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:49:10,703 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;@39096877, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:49:10,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 11:49:10,707 INFO L130 PetriNetUnfolder]: 1/13 cut-off events. [2022-12-13 11:49:10,707 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:49:10,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:10,708 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:49:10,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:10,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1262481847, now seen corresponding path program 1 times [2022-12-13 11:49:10,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:10,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945282212] [2022-12-13 11:49:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:10,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:10,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:10,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945282212] [2022-12-13 11:49:10,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945282212] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:10,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:10,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:49:10,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697462421] [2022-12-13 11:49:10,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:10,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:49:10,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:10,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:49:10,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:49:10,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 320 [2022-12-13 11:49:10,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:10,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:10,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 320 [2022-12-13 11:49:10,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:11,102 INFO L130 PetriNetUnfolder]: 511/891 cut-off events. [2022-12-13 11:49:11,102 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-12-13 11:49:11,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 891 events. 511/891 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3450 event pairs, 211 based on Foata normal form. 20/726 useless extension candidates. Maximal degree in co-relation 1614. Up to 527 conditions per place. [2022-12-13 11:49:11,107 INFO L137 encePairwiseOnDemand]: 315/320 looper letters, 45 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2022-12-13 11:49:11,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 213 flow [2022-12-13 11:49:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:49:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:49:11,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2022-12-13 11:49:11,118 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5270833333333333 [2022-12-13 11:49:11,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2022-12-13 11:49:11,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2022-12-13 11:49:11,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:11,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2022-12-13 11:49:11,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:11,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:11,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:11,137 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 506 transitions. [2022-12-13 11:49:11,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 213 flow [2022-12-13 11:49:11,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:49:11,141 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2022-12-13 11:49:11,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2022-12-13 11:49:11,147 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2022-12-13 11:49:11,147 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2022-12-13 11:49:11,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:11,148 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:11,148 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:11,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:49:11,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:11,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:11,149 INFO L85 PathProgramCache]: Analyzing trace with hash -66010489, now seen corresponding path program 1 times [2022-12-13 11:49:11,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:11,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610764521] [2022-12-13 11:49:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:11,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:11,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:11,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610764521] [2022-12-13 11:49:11,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610764521] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:11,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:11,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:49:11,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921359171] [2022-12-13 11:49:11,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:11,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:49:11,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:11,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:49:11,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:49:11,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 320 [2022-12-13 11:49:11,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:11,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:11,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 320 [2022-12-13 11:49:11,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:11,376 INFO L130 PetriNetUnfolder]: 562/973 cut-off events. [2022-12-13 11:49:11,376 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-12-13 11:49:11,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2040 conditions, 973 events. 562/973 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4288 event pairs, 263 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 1696. Up to 831 conditions per place. [2022-12-13 11:49:11,379 INFO L137 encePairwiseOnDemand]: 317/320 looper letters, 43 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2022-12-13 11:49:11,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 216 flow [2022-12-13 11:49:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:49:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:49:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2022-12-13 11:49:11,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5322916666666667 [2022-12-13 11:49:11,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2022-12-13 11:49:11,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2022-12-13 11:49:11,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:11,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2022-12-13 11:49:11,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:11,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:11,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:11,385 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 511 transitions. [2022-12-13 11:49:11,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 216 flow [2022-12-13 11:49:11,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:49:11,386 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2022-12-13 11:49:11,387 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2022-12-13 11:49:11,387 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2022-12-13 11:49:11,387 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2022-12-13 11:49:11,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:11,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:11,388 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:11,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:49:11,388 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash 578386092, now seen corresponding path program 1 times [2022-12-13 11:49:11,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:11,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091883243] [2022-12-13 11:49:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:11,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:11,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091883243] [2022-12-13 11:49:11,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091883243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:49:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418789755] [2022-12-13 11:49:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:11,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:11,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:11,473 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:11,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:49:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:11,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:49:11,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:11,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:11,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418789755] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:11,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:49:11,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-12-13 11:49:11,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891535418] [2022-12-13 11:49:11,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:11,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:49:11,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:11,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:49:11,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:49:11,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 320 [2022-12-13 11:49:11,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 151.4) internal successors, (1514), 10 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:11,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:11,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 320 [2022-12-13 11:49:11,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:12,127 INFO L130 PetriNetUnfolder]: 1530/2544 cut-off events. [2022-12-13 11:49:12,127 INFO L131 PetriNetUnfolder]: For 792/792 co-relation queries the response was YES. [2022-12-13 11:49:12,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5832 conditions, 2544 events. 1530/2544 cut-off events. For 792/792 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11722 event pairs, 226 based on Foata normal form. 78/2285 useless extension candidates. Maximal degree in co-relation 5253. Up to 737 conditions per place. [2022-12-13 11:49:12,137 INFO L137 encePairwiseOnDemand]: 312/320 looper letters, 150 selfloop transitions, 26 changer transitions 3/180 dead transitions. [2022-12-13 11:49:12,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 180 transitions, 837 flow [2022-12-13 11:49:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:49:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:49:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1958 transitions. [2022-12-13 11:49:12,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5098958333333333 [2022-12-13 11:49:12,142 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1958 transitions. [2022-12-13 11:49:12,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1958 transitions. [2022-12-13 11:49:12,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:12,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1958 transitions. [2022-12-13 11:49:12,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 163.16666666666666) internal successors, (1958), 12 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 320.0) internal successors, (4160), 13 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,154 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 320.0) internal successors, (4160), 13 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,155 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1958 transitions. [2022-12-13 11:49:12,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 180 transitions, 837 flow [2022-12-13 11:49:12,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 180 transitions, 822 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:49:12,161 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2022-12-13 11:49:12,161 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2022-12-13 11:49:12,161 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2022-12-13 11:49:12,162 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2022-12-13 11:49:12,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.4) internal successors, (1514), 10 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,163 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:12,163 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:12,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:49:12,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:12,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash -447914001, now seen corresponding path program 1 times [2022-12-13 11:49:12,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:12,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919535833] [2022-12-13 11:49:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:12,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:12,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:12,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919535833] [2022-12-13 11:49:12,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919535833] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:12,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:12,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:49:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604908253] [2022-12-13 11:49:12,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:12,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:49:12,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:12,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:49:12,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:49:12,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 320 [2022-12-13 11:49:12,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:12,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 320 [2022-12-13 11:49:12,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:12,712 INFO L130 PetriNetUnfolder]: 494/959 cut-off events. [2022-12-13 11:49:12,712 INFO L131 PetriNetUnfolder]: For 587/587 co-relation queries the response was YES. [2022-12-13 11:49:12,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2418 conditions, 959 events. 494/959 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4186 event pairs, 98 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 2306. Up to 634 conditions per place. [2022-12-13 11:49:12,716 INFO L137 encePairwiseOnDemand]: 315/320 looper letters, 41 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2022-12-13 11:49:12,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 340 flow [2022-12-13 11:49:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:49:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:49:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2022-12-13 11:49:12,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5197916666666667 [2022-12-13 11:49:12,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2022-12-13 11:49:12,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2022-12-13 11:49:12,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:12,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2022-12-13 11:49:12,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,720 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 499 transitions. [2022-12-13 11:49:12,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 340 flow [2022-12-13 11:49:12,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 319 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-12-13 11:49:12,724 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2022-12-13 11:49:12,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2022-12-13 11:49:12,725 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2022-12-13 11:49:12,725 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2022-12-13 11:49:12,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:12,725 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:12,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:49:12,726 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:12,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1795109846, now seen corresponding path program 1 times [2022-12-13 11:49:12,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:12,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85187329] [2022-12-13 11:49:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:12,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:12,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:12,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85187329] [2022-12-13 11:49:12,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85187329] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:12,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:12,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:49:12,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119989449] [2022-12-13 11:49:12,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:12,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:49:12,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:12,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:49:12,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:49:12,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 320 [2022-12-13 11:49:12,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:12,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 320 [2022-12-13 11:49:12,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:12,914 INFO L130 PetriNetUnfolder]: 557/1078 cut-off events. [2022-12-13 11:49:12,914 INFO L131 PetriNetUnfolder]: For 473/473 co-relation queries the response was YES. [2022-12-13 11:49:12,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2756 conditions, 1078 events. 557/1078 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4679 event pairs, 353 based on Foata normal form. 24/1102 useless extension candidates. Maximal degree in co-relation 2048. Up to 773 conditions per place. [2022-12-13 11:49:12,920 INFO L137 encePairwiseOnDemand]: 314/320 looper letters, 49 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2022-12-13 11:49:12,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 365 flow [2022-12-13 11:49:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:49:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:49:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2022-12-13 11:49:12,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.525 [2022-12-13 11:49:12,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2022-12-13 11:49:12,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2022-12-13 11:49:12,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:12,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2022-12-13 11:49:12,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,924 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 504 transitions. [2022-12-13 11:49:12,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 365 flow [2022-12-13 11:49:12,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:49:12,927 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2022-12-13 11:49:12,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2022-12-13 11:49:12,927 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2022-12-13 11:49:12,928 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2022-12-13 11:49:12,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:12,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:12,928 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:12,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 11:49:12,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:12,928 INFO L85 PathProgramCache]: Analyzing trace with hash -622672814, now seen corresponding path program 1 times [2022-12-13 11:49:12,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:12,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245063699] [2022-12-13 11:49:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:12,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:13,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:13,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245063699] [2022-12-13 11:49:13,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245063699] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:13,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:13,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 11:49:13,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027772945] [2022-12-13 11:49:13,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:13,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 11:49:13,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:13,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 11:49:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:49:13,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 320 [2022-12-13 11:49:13,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 139.72727272727272) internal successors, (1537), 11 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:13,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:13,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 320 [2022-12-13 11:49:13,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:14,410 INFO L130 PetriNetUnfolder]: 814/1582 cut-off events. [2022-12-13 11:49:14,410 INFO L131 PetriNetUnfolder]: For 1281/1281 co-relation queries the response was YES. [2022-12-13 11:49:14,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4029 conditions, 1582 events. 814/1582 cut-off events. For 1281/1281 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7807 event pairs, 237 based on Foata normal form. 0/1559 useless extension candidates. Maximal degree in co-relation 2384. Up to 850 conditions per place. [2022-12-13 11:49:14,418 INFO L137 encePairwiseOnDemand]: 310/320 looper letters, 87 selfloop transitions, 11 changer transitions 13/121 dead transitions. [2022-12-13 11:49:14,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 121 transitions, 711 flow [2022-12-13 11:49:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:49:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:49:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1341 transitions. [2022-12-13 11:49:14,423 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.465625 [2022-12-13 11:49:14,423 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1341 transitions. [2022-12-13 11:49:14,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1341 transitions. [2022-12-13 11:49:14,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:14,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1341 transitions. [2022-12-13 11:49:14,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.0) internal successors, (1341), 9 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:14,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 320.0) internal successors, (3200), 10 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:14,433 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 320.0) internal successors, (3200), 10 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:14,433 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 9 states and 1341 transitions. [2022-12-13 11:49:14,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 121 transitions, 711 flow [2022-12-13 11:49:14,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 121 transitions, 671 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-12-13 11:49:14,438 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 310 flow [2022-12-13 11:49:14,439 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=310, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2022-12-13 11:49:14,439 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2022-12-13 11:49:14,439 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 310 flow [2022-12-13 11:49:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.72727272727272) internal successors, (1537), 11 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:14,440 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:14,440 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:14,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 11:49:14,441 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:14,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:14,441 INFO L85 PathProgramCache]: Analyzing trace with hash 302294868, now seen corresponding path program 2 times [2022-12-13 11:49:14,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:14,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697418353] [2022-12-13 11:49:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:14,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:14,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:14,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697418353] [2022-12-13 11:49:14,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697418353] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:14,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:14,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 11:49:14,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938576635] [2022-12-13 11:49:14,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:14,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 11:49:14,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:14,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 11:49:14,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:49:15,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 320 [2022-12-13 11:49:15,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 310 flow. Second operand has 11 states, 11 states have (on average 139.72727272727272) internal successors, (1537), 11 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:15,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:15,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 320 [2022-12-13 11:49:15,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:15,950 INFO L130 PetriNetUnfolder]: 1054/2046 cut-off events. [2022-12-13 11:49:15,950 INFO L131 PetriNetUnfolder]: For 1356/1356 co-relation queries the response was YES. [2022-12-13 11:49:15,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5482 conditions, 2046 events. 1054/2046 cut-off events. For 1356/1356 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10736 event pairs, 289 based on Foata normal form. 0/2016 useless extension candidates. Maximal degree in co-relation 3905. Up to 803 conditions per place. [2022-12-13 11:49:15,957 INFO L137 encePairwiseOnDemand]: 311/320 looper letters, 87 selfloop transitions, 16 changer transitions 13/126 dead transitions. [2022-12-13 11:49:15,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 126 transitions, 778 flow [2022-12-13 11:49:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:49:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:49:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1341 transitions. [2022-12-13 11:49:15,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.465625 [2022-12-13 11:49:15,960 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1341 transitions. [2022-12-13 11:49:15,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1341 transitions. [2022-12-13 11:49:15,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:15,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1341 transitions. [2022-12-13 11:49:15,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.0) internal successors, (1341), 9 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:15,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 320.0) internal successors, (3200), 10 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:15,965 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 320.0) internal successors, (3200), 10 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:15,965 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 310 flow. Second operand 9 states and 1341 transitions. [2022-12-13 11:49:15,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 126 transitions, 778 flow [2022-12-13 11:49:15,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 126 transitions, 778 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:49:15,970 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 406 flow [2022-12-13 11:49:15,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2022-12-13 11:49:15,971 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2022-12-13 11:49:15,971 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 406 flow [2022-12-13 11:49:15,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.72727272727272) internal successors, (1537), 11 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:15,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:15,971 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:15,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 11:49:15,972 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:15,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1182292392, now seen corresponding path program 1 times [2022-12-13 11:49:15,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:15,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255301903] [2022-12-13 11:49:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:15,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:16,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:16,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255301903] [2022-12-13 11:49:16,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255301903] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:49:16,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730212964] [2022-12-13 11:49:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:16,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:16,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:16,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:16,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:49:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:16,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:49:16,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:49:16,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:49:16,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730212964] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:16,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:49:16,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-13 11:49:16,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996325983] [2022-12-13 11:49:16,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:16,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:49:16,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:16,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:49:16,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:49:16,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 320 [2022-12-13 11:49:16,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 406 flow. Second operand has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:16,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:16,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 320 [2022-12-13 11:49:16,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:16,492 INFO L130 PetriNetUnfolder]: 1190/2211 cut-off events. [2022-12-13 11:49:16,492 INFO L131 PetriNetUnfolder]: For 1984/1984 co-relation queries the response was YES. [2022-12-13 11:49:16,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6321 conditions, 2211 events. 1190/2211 cut-off events. For 1984/1984 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10860 event pairs, 493 based on Foata normal form. 34/2225 useless extension candidates. Maximal degree in co-relation 4719. Up to 933 conditions per place. [2022-12-13 11:49:16,500 INFO L137 encePairwiseOnDemand]: 312/320 looper letters, 101 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2022-12-13 11:49:16,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 862 flow [2022-12-13 11:49:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:49:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:49:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 960 transitions. [2022-12-13 11:49:16,502 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-13 11:49:16,502 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 960 transitions. [2022-12-13 11:49:16,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 960 transitions. [2022-12-13 11:49:16,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:16,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 960 transitions. [2022-12-13 11:49:16,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:16,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:16,506 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:16,506 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 406 flow. Second operand 6 states and 960 transitions. [2022-12-13 11:49:16,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 862 flow [2022-12-13 11:49:16,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 834 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-12-13 11:49:16,513 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 507 flow [2022-12-13 11:49:16,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2022-12-13 11:49:16,514 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2022-12-13 11:49:16,514 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 507 flow [2022-12-13 11:49:16,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:16,515 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:16,515 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 11:49:16,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:49:16,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:16,715 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:16,716 INFO L85 PathProgramCache]: Analyzing trace with hash -82105844, now seen corresponding path program 2 times [2022-12-13 11:49:16,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:16,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335356254] [2022-12-13 11:49:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:16,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:16,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335356254] [2022-12-13 11:49:16,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335356254] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:49:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111046238] [2022-12-13 11:49:16,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:49:16,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:16,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:16,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:49:16,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:49:16,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:49:16,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:49:16,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:16,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:17,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111046238] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:17,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:49:17,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-13 11:49:17,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744873145] [2022-12-13 11:49:17,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:17,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:49:17,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:17,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:49:17,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:49:17,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 320 [2022-12-13 11:49:17,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 507 flow. Second operand has 18 states, 18 states have (on average 151.44444444444446) internal successors, (2726), 18 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:17,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:17,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 320 [2022-12-13 11:49:17,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:17,645 INFO L130 PetriNetUnfolder]: 1578/2975 cut-off events. [2022-12-13 11:49:17,645 INFO L131 PetriNetUnfolder]: For 4128/4128 co-relation queries the response was YES. [2022-12-13 11:49:17,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8870 conditions, 2975 events. 1578/2975 cut-off events. For 4128/4128 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 13922 event pairs, 335 based on Foata normal form. 32/2987 useless extension candidates. Maximal degree in co-relation 7508. Up to 912 conditions per place. [2022-12-13 11:49:17,657 INFO L137 encePairwiseOnDemand]: 314/320 looper letters, 203 selfloop transitions, 31 changer transitions 6/242 dead transitions. [2022-12-13 11:49:17,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 242 transitions, 1697 flow [2022-12-13 11:49:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 11:49:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 11:49:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2732 transitions. [2022-12-13 11:49:17,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5022058823529412 [2022-12-13 11:49:17,661 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2732 transitions. [2022-12-13 11:49:17,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2732 transitions. [2022-12-13 11:49:17,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:17,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2732 transitions. [2022-12-13 11:49:17,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 160.7058823529412) internal successors, (2732), 17 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:17,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 320.0) internal successors, (5760), 18 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:17,671 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 320.0) internal successors, (5760), 18 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:17,671 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 507 flow. Second operand 17 states and 2732 transitions. [2022-12-13 11:49:17,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 242 transitions, 1697 flow [2022-12-13 11:49:17,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 242 transitions, 1693 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-13 11:49:17,680 INFO L231 Difference]: Finished difference. Result has 100 places, 87 transitions, 745 flow [2022-12-13 11:49:17,680 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=745, PETRI_PLACES=100, PETRI_TRANSITIONS=87} [2022-12-13 11:49:17,681 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 66 predicate places. [2022-12-13 11:49:17,681 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 87 transitions, 745 flow [2022-12-13 11:49:17,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 151.44444444444446) internal successors, (2726), 18 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:17,681 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:17,682 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:17,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:49:17,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 11:49:17,883 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:17,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:17,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1955895191, now seen corresponding path program 3 times [2022-12-13 11:49:17,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:17,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351969674] [2022-12-13 11:49:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:17,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:20,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:20,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351969674] [2022-12-13 11:49:20,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351969674] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:49:20,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781698981] [2022-12-13 11:49:20,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:49:20,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:20,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:20,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:20,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:49:20,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 11:49:20,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:49:20,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 11:49:20,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:20,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-13 11:49:21,331 INFO L350 Elim1Store]: Elim1 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 108 treesize of output 44 [2022-12-13 11:49:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:49:21,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:49:21,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781698981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:21,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:49:21,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [18] total 31 [2022-12-13 11:49:21,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580368858] [2022-12-13 11:49:21,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:21,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:49:21,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:21,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:49:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 11:49:23,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 320 [2022-12-13 11:49:23,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 87 transitions, 745 flow. Second operand has 15 states, 15 states have (on average 131.86666666666667) internal successors, (1978), 15 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:23,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:23,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 320 [2022-12-13 11:49:23,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:26,109 INFO L130 PetriNetUnfolder]: 2655/4959 cut-off events. [2022-12-13 11:49:26,109 INFO L131 PetriNetUnfolder]: For 7434/7434 co-relation queries the response was YES. [2022-12-13 11:49:26,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15520 conditions, 4959 events. 2655/4959 cut-off events. For 7434/7434 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 26225 event pairs, 726 based on Foata normal form. 0/4931 useless extension candidates. Maximal degree in co-relation 14069. Up to 1528 conditions per place. [2022-12-13 11:49:26,131 INFO L137 encePairwiseOnDemand]: 302/320 looper letters, 140 selfloop transitions, 113 changer transitions 4/267 dead transitions. [2022-12-13 11:49:26,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 267 transitions, 2258 flow [2022-12-13 11:49:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 11:49:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 11:49:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3669 transitions. [2022-12-13 11:49:26,140 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42465277777777777 [2022-12-13 11:49:26,140 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3669 transitions. [2022-12-13 11:49:26,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3669 transitions. [2022-12-13 11:49:26,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:26,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3669 transitions. [2022-12-13 11:49:26,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 135.88888888888889) internal successors, (3669), 27 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:26,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 320.0) internal successors, (8960), 28 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:26,159 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 320.0) internal successors, (8960), 28 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:26,159 INFO L175 Difference]: Start difference. First operand has 100 places, 87 transitions, 745 flow. Second operand 27 states and 3669 transitions. [2022-12-13 11:49:26,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 267 transitions, 2258 flow [2022-12-13 11:49:26,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 267 transitions, 2051 flow, removed 76 selfloop flow, removed 7 redundant places. [2022-12-13 11:49:26,180 INFO L231 Difference]: Finished difference. Result has 125 places, 173 transitions, 1654 flow [2022-12-13 11:49:26,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1654, PETRI_PLACES=125, PETRI_TRANSITIONS=173} [2022-12-13 11:49:26,180 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 91 predicate places. [2022-12-13 11:49:26,181 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 173 transitions, 1654 flow [2022-12-13 11:49:26,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.86666666666667) internal successors, (1978), 15 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:26,182 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:26,182 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:26,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:49:26,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 11:49:26,384 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash -170041675, now seen corresponding path program 4 times [2022-12-13 11:49:26,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:26,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806926341] [2022-12-13 11:49:26,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:26,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:49:27,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:27,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806926341] [2022-12-13 11:49:27,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806926341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:49:27,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445752419] [2022-12-13 11:49:27,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:49:27,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:27,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:27,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:27,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:49:27,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:49:27,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:49:27,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-13 11:49:27,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:27,111 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 11:49:27,111 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2022-12-13 11:49:27,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-13 11:49:27,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-12-13 11:49:27,857 INFO L350 Elim1Store]: Elim1 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 76 treesize of output 44 [2022-12-13 11:49:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:27,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:28,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:49:28,270 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:49:28,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:49:28,279 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:49:28,283 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:49:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:49:28,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445752419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:28,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:49:28,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 44 [2022-12-13 11:49:28,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728835182] [2022-12-13 11:49:28,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:28,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 11:49:28,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:28,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 11:49:28,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1894, Unknown=7, NotChecked=0, Total=2070 [2022-12-13 11:49:30,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 320 [2022-12-13 11:49:30,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 173 transitions, 1654 flow. Second operand has 46 states, 46 states have (on average 105.82608695652173) internal successors, (4868), 46 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:30,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:30,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 320 [2022-12-13 11:49:30,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:37,489 INFO L130 PetriNetUnfolder]: 3432/6372 cut-off events. [2022-12-13 11:49:37,489 INFO L131 PetriNetUnfolder]: For 12799/12799 co-relation queries the response was YES. [2022-12-13 11:49:37,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22070 conditions, 6372 events. 3432/6372 cut-off events. For 12799/12799 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 35694 event pairs, 544 based on Foata normal form. 54/6389 useless extension candidates. Maximal degree in co-relation 18180. Up to 1562 conditions per place. [2022-12-13 11:49:37,517 INFO L137 encePairwiseOnDemand]: 302/320 looper letters, 277 selfloop transitions, 229 changer transitions 15/521 dead transitions. [2022-12-13 11:49:37,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 521 transitions, 4361 flow [2022-12-13 11:49:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-13 11:49:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-12-13 11:49:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 6710 transitions. [2022-12-13 11:49:37,527 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34375 [2022-12-13 11:49:37,528 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 6710 transitions. [2022-12-13 11:49:37,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 6710 transitions. [2022-12-13 11:49:37,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:37,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 6710 transitions. [2022-12-13 11:49:37,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 110.0) internal successors, (6710), 61 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:37,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 320.0) internal successors, (19840), 62 states have internal predecessors, (19840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:37,556 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 320.0) internal successors, (19840), 62 states have internal predecessors, (19840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:37,556 INFO L175 Difference]: Start difference. First operand has 125 places, 173 transitions, 1654 flow. Second operand 61 states and 6710 transitions. [2022-12-13 11:49:37,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 521 transitions, 4361 flow [2022-12-13 11:49:37,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 521 transitions, 4184 flow, removed 47 selfloop flow, removed 6 redundant places. [2022-12-13 11:49:37,597 INFO L231 Difference]: Finished difference. Result has 190 places, 275 transitions, 3052 flow [2022-12-13 11:49:37,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=3052, PETRI_PLACES=190, PETRI_TRANSITIONS=275} [2022-12-13 11:49:37,597 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 156 predicate places. [2022-12-13 11:49:37,597 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 275 transitions, 3052 flow [2022-12-13 11:49:37,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 105.82608695652173) internal successors, (4868), 46 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:37,598 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:37,598 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:37,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:49:37,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:37,800 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:49:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:37,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1808128207, now seen corresponding path program 1 times [2022-12-13 11:49:37,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:37,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255124311] [2022-12-13 11:49:37,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:37,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:38,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:38,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255124311] [2022-12-13 11:49:38,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255124311] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:49:38,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054693774] [2022-12-13 11:49:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:38,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:38,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:38,970 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:38,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:49:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:39,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-13 11:49:39,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:39,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-13 11:49:39,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:49:39,558 INFO L350 Elim1Store]: Elim1 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 69 treesize of output 41 [2022-12-13 11:49:40,101 INFO L350 Elim1Store]: Elim1 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 108 treesize of output 44 [2022-12-13 11:49:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:40,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:41,032 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:49:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:41,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054693774] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:41,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:49:41,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 18] total 60 [2022-12-13 11:49:41,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76215118] [2022-12-13 11:49:41,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:41,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 11:49:41,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:41,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 11:49:41,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=3445, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 11:49:50,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 320 [2022-12-13 11:49:50,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 275 transitions, 3052 flow. Second operand has 61 states, 61 states have (on average 125.77049180327869) internal successors, (7672), 61 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:50,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:50,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 320 [2022-12-13 11:49:50,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:50:45,210 INFO L130 PetriNetUnfolder]: 8558/15864 cut-off events. [2022-12-13 11:50:45,210 INFO L131 PetriNetUnfolder]: For 42025/42025 co-relation queries the response was YES. [2022-12-13 11:50:45,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60203 conditions, 15864 events. 8558/15864 cut-off events. For 42025/42025 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 108161 event pairs, 1268 based on Foata normal form. 44/15835 useless extension candidates. Maximal degree in co-relation 49359. Up to 2858 conditions per place. [2022-12-13 11:50:45,325 INFO L137 encePairwiseOnDemand]: 301/320 looper letters, 766 selfloop transitions, 669 changer transitions 143/1578 dead transitions. [2022-12-13 11:50:45,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1578 transitions, 14048 flow [2022-12-13 11:50:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-12-13 11:50:45,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2022-12-13 11:50:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 29450 transitions. [2022-12-13 11:50:45,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4036458333333333 [2022-12-13 11:50:45,363 INFO L72 ComplementDD]: Start complementDD. Operand 228 states and 29450 transitions. [2022-12-13 11:50:45,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 228 states and 29450 transitions. [2022-12-13 11:50:45,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:50:45,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 228 states and 29450 transitions. [2022-12-13 11:50:45,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 229 states, 228 states have (on average 129.16666666666666) internal successors, (29450), 228 states have internal predecessors, (29450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:50:45,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 229 states, 229 states have (on average 320.0) internal successors, (73280), 229 states have internal predecessors, (73280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:50:45,477 INFO L81 ComplementDD]: Finished complementDD. Result has 229 states, 229 states have (on average 320.0) internal successors, (73280), 229 states have internal predecessors, (73280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:50:45,477 INFO L175 Difference]: Start difference. First operand has 190 places, 275 transitions, 3052 flow. Second operand 228 states and 29450 transitions. [2022-12-13 11:50:45,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1578 transitions, 14048 flow [2022-12-13 11:50:45,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1578 transitions, 13088 flow, removed 336 selfloop flow, removed 11 redundant places. [2022-12-13 11:50:45,745 INFO L231 Difference]: Finished difference. Result has 424 places, 753 transitions, 9286 flow [2022-12-13 11:50:45,745 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=2668, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=228, PETRI_FLOW=9286, PETRI_PLACES=424, PETRI_TRANSITIONS=753} [2022-12-13 11:50:45,746 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 390 predicate places. [2022-12-13 11:50:45,746 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 753 transitions, 9286 flow [2022-12-13 11:50:45,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 125.77049180327869) internal successors, (7672), 61 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:50:45,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:50:45,747 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:50:45,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 11:50:45,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:50:45,948 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:50:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:50:45,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1600129767, now seen corresponding path program 2 times [2022-12-13 11:50:45,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:50:45,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688054967] [2022-12-13 11:50:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:50:45,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:50:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:50:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:50:47,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:50:47,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688054967] [2022-12-13 11:50:47,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688054967] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:50:47,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38634114] [2022-12-13 11:50:47,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:50:47,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:50:47,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:50:47,144 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:50:47,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:50:47,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:50:47,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:50:47,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-13 11:50:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:50:47,339 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-13 11:50:47,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 11:50:47,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-13 11:50:47,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-12-13 11:50:47,981 INFO L321 Elim1Store]: treesize reduction 31, result has 44.6 percent of original size [2022-12-13 11:50:47,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 73 treesize of output 58 [2022-12-13 11:50:48,501 INFO L350 Elim1Store]: Elim1 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 108 treesize of output 44 [2022-12-13 11:50:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:50:48,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:50:49,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:50:49,562 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:50:49,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:50:49,567 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:50:49,571 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:50:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:50:49,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38634114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:50:49,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:50:49,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 63 [2022-12-13 11:50:49,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327448879] [2022-12-13 11:50:49,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:50:49,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-13 11:50:49,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:50:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-13 11:50:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3920, Unknown=2, NotChecked=0, Total=4160 [2022-12-13 11:50:59,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 320 [2022-12-13 11:50:59,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 753 transitions, 9286 flow. Second operand has 65 states, 65 states have (on average 122.66153846153846) internal successors, (7973), 65 states have internal predecessors, (7973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:50:59,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:50:59,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 320 [2022-12-13 11:50:59,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:51:45,000 INFO L130 PetriNetUnfolder]: 12956/24100 cut-off events. [2022-12-13 11:51:45,000 INFO L131 PetriNetUnfolder]: For 81591/81591 co-relation queries the response was YES. [2022-12-13 11:51:45,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98254 conditions, 24100 events. 12956/24100 cut-off events. For 81591/81591 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 174184 event pairs, 1439 based on Foata normal form. 160/24151 useless extension candidates. Maximal degree in co-relation 98117. Up to 4432 conditions per place. [2022-12-13 11:51:45,162 INFO L137 encePairwiseOnDemand]: 301/320 looper letters, 518 selfloop transitions, 1281 changer transitions 102/1901 dead transitions. [2022-12-13 11:51:45,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1901 transitions, 22276 flow [2022-12-13 11:51:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-12-13 11:51:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2022-12-13 11:51:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 21892 transitions. [2022-12-13 11:51:45,177 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39317528735632185 [2022-12-13 11:51:45,177 INFO L72 ComplementDD]: Start complementDD. Operand 174 states and 21892 transitions. [2022-12-13 11:51:45,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 174 states and 21892 transitions. [2022-12-13 11:51:45,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:51:45,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 174 states and 21892 transitions. [2022-12-13 11:51:45,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 175 states, 174 states have (on average 125.816091954023) internal successors, (21892), 174 states have internal predecessors, (21892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:45,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 175 states, 175 states have (on average 320.0) internal successors, (56000), 175 states have internal predecessors, (56000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:45,243 INFO L81 ComplementDD]: Finished complementDD. Result has 175 states, 175 states have (on average 320.0) internal successors, (56000), 175 states have internal predecessors, (56000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:45,243 INFO L175 Difference]: Start difference. First operand has 424 places, 753 transitions, 9286 flow. Second operand 174 states and 21892 transitions. [2022-12-13 11:51:45,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1901 transitions, 22276 flow [2022-12-13 11:51:46,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 1901 transitions, 20284 flow, removed 357 selfloop flow, removed 33 redundant places. [2022-12-13 11:51:46,048 INFO L231 Difference]: Finished difference. Result has 532 places, 1368 transitions, 18244 flow [2022-12-13 11:51:46,049 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=7484, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=174, PETRI_FLOW=18244, PETRI_PLACES=532, PETRI_TRANSITIONS=1368} [2022-12-13 11:51:46,049 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 498 predicate places. [2022-12-13 11:51:46,049 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1368 transitions, 18244 flow [2022-12-13 11:51:46,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 122.66153846153846) internal successors, (7973), 65 states have internal predecessors, (7973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:46,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:51:46,050 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:51:46,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:51:46,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 11:51:46,251 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:51:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:51:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1987026760, now seen corresponding path program 2 times [2022-12-13 11:51:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:51:46,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463826898] [2022-12-13 11:51:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:51:46,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:51:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:51:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:51:46,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:51:46,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463826898] [2022-12-13 11:51:46,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463826898] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:51:46,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338425473] [2022-12-13 11:51:46,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:51:46,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:51:46,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:51:46,383 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:51:46,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:51:46,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:51:46,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:51:46,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:51:46,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:51:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:51:46,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:51:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:51:46,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338425473] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:51:46,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:51:46,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-13 11:51:46,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220070873] [2022-12-13 11:51:46,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:51:46,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 11:51:46,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:51:46,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 11:51:46,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-12-13 11:51:46,706 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 320 [2022-12-13 11:51:46,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1368 transitions, 18244 flow. Second operand has 20 states, 20 states have (on average 148.25) internal successors, (2965), 20 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:46,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:51:46,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 320 [2022-12-13 11:51:46,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:51:54,907 INFO L130 PetriNetUnfolder]: 14190/26470 cut-off events. [2022-12-13 11:51:54,907 INFO L131 PetriNetUnfolder]: For 103718/103718 co-relation queries the response was YES. [2022-12-13 11:51:55,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116728 conditions, 26470 events. 14190/26470 cut-off events. For 103718/103718 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 194400 event pairs, 3311 based on Foata normal form. 136/26553 useless extension candidates. Maximal degree in co-relation 109223. Up to 5515 conditions per place. [2022-12-13 11:51:55,160 INFO L137 encePairwiseOnDemand]: 312/320 looper letters, 1287 selfloop transitions, 777 changer transitions 12/2076 dead transitions. [2022-12-13 11:51:55,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 2076 transitions, 30303 flow [2022-12-13 11:51:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 11:51:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 11:51:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3538 transitions. [2022-12-13 11:51:55,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4807065217391304 [2022-12-13 11:51:55,166 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3538 transitions. [2022-12-13 11:51:55,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3538 transitions. [2022-12-13 11:51:55,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:51:55,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3538 transitions. [2022-12-13 11:51:55,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 153.82608695652175) internal successors, (3538), 23 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:55,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 320.0) internal successors, (7680), 24 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:55,176 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 320.0) internal successors, (7680), 24 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:55,176 INFO L175 Difference]: Start difference. First operand has 532 places, 1368 transitions, 18244 flow. Second operand 23 states and 3538 transitions. [2022-12-13 11:51:55,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 2076 transitions, 30303 flow [2022-12-13 11:51:56,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 2076 transitions, 29123 flow, removed 492 selfloop flow, removed 15 redundant places. [2022-12-13 11:51:56,670 INFO L231 Difference]: Finished difference. Result has 543 places, 1468 transitions, 21024 flow [2022-12-13 11:51:56,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=16708, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=627, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=21024, PETRI_PLACES=543, PETRI_TRANSITIONS=1468} [2022-12-13 11:51:56,671 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 509 predicate places. [2022-12-13 11:51:56,671 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 1468 transitions, 21024 flow [2022-12-13 11:51:56,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 148.25) internal successors, (2965), 20 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:56,672 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:51:56,672 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:51:56,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:51:56,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:51:56,873 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:51:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:51:56,874 INFO L85 PathProgramCache]: Analyzing trace with hash -710757698, now seen corresponding path program 3 times [2022-12-13 11:51:56,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:51:56,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486931508] [2022-12-13 11:51:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:51:56,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:51:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:51:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:51:58,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:51:58,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486931508] [2022-12-13 11:51:58,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486931508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:51:58,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484906853] [2022-12-13 11:51:58,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:51:58,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:51:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:51:58,251 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:51:58,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:51:58,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:51:58,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:51:58,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-13 11:51:58,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:51:58,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-13 11:51:59,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:51:59,053 INFO L350 Elim1Store]: Elim1 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 69 treesize of output 41 [2022-12-13 11:51:59,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:51:59,337 INFO L350 Elim1Store]: Elim1 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 69 treesize of output 41 [2022-12-13 11:52:00,039 INFO L350 Elim1Store]: Elim1 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 108 treesize of output 44 [2022-12-13 11:52:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:52:00,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:52:01,755 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:52:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:52:01,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484906853] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:52:01,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:52:01,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 75 [2022-12-13 11:52:01,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828099068] [2022-12-13 11:52:01,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:52:01,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-13 11:52:01,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:52:01,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-13 11:52:01,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=5431, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 11:52:16,540 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 320 [2022-12-13 11:52:16,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 1468 transitions, 21024 flow. Second operand has 76 states, 76 states have (on average 126.01315789473684) internal successors, (9577), 76 states have internal predecessors, (9577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:52:16,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:52:16,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 320 [2022-12-13 11:52:16,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:00,856 INFO L130 PetriNetUnfolder]: 31904/59821 cut-off events. [2022-12-13 11:54:00,856 INFO L131 PetriNetUnfolder]: For 216291/216291 co-relation queries the response was YES. [2022-12-13 11:54:01,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268374 conditions, 59821 events. 31904/59821 cut-off events. For 216291/216291 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 482348 event pairs, 4472 based on Foata normal form. 196/59925 useless extension candidates. Maximal degree in co-relation 251603. Up to 11089 conditions per place. [2022-12-13 11:54:01,444 INFO L137 encePairwiseOnDemand]: 301/320 looper letters, 1164 selfloop transitions, 2951 changer transitions 162/4277 dead transitions. [2022-12-13 11:54:01,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 4277 transitions, 60345 flow [2022-12-13 11:54:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2022-12-13 11:54:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2022-12-13 11:54:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 35482 transitions. [2022-12-13 11:54:01,475 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4032045454545455 [2022-12-13 11:54:01,475 INFO L72 ComplementDD]: Start complementDD. Operand 275 states and 35482 transitions. [2022-12-13 11:54:01,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 275 states and 35482 transitions. [2022-12-13 11:54:01,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:01,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 275 states and 35482 transitions. [2022-12-13 11:54:01,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 276 states, 275 states have (on average 129.02545454545455) internal successors, (35482), 275 states have internal predecessors, (35482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:01,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 276 states, 276 states have (on average 320.0) internal successors, (88320), 276 states have internal predecessors, (88320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:01,554 INFO L81 ComplementDD]: Finished complementDD. Result has 276 states, 276 states have (on average 320.0) internal successors, (88320), 276 states have internal predecessors, (88320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:01,555 INFO L175 Difference]: Start difference. First operand has 543 places, 1468 transitions, 21024 flow. Second operand 275 states and 35482 transitions. [2022-12-13 11:54:01,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 4277 transitions, 60345 flow [2022-12-13 11:54:04,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 809 places, 4277 transitions, 57966 flow, removed 523 selfloop flow, removed 8 redundant places. [2022-12-13 11:54:04,565 INFO L231 Difference]: Finished difference. Result has 840 places, 3217 transitions, 52773 flow [2022-12-13 11:54:04,566 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=20098, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=275, PETRI_FLOW=52773, PETRI_PLACES=840, PETRI_TRANSITIONS=3217} [2022-12-13 11:54:04,566 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 806 predicate places. [2022-12-13 11:54:04,566 INFO L495 AbstractCegarLoop]: Abstraction has has 840 places, 3217 transitions, 52773 flow [2022-12-13 11:54:04,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 126.01315789473684) internal successors, (9577), 76 states have internal predecessors, (9577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:04,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:04,567 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:54:04,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:54:04,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 11:54:04,769 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:54:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1900948552, now seen corresponding path program 4 times [2022-12-13 11:54:04,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:04,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606515504] [2022-12-13 11:54:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:04,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:06,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:06,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606515504] [2022-12-13 11:54:06,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606515504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:06,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999610244] [2022-12-13 11:54:06,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:54:06,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:06,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:06,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:06,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:54:06,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:54:06,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:54:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 103 conjunts are in the unsatisfiable core [2022-12-13 11:54:06,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:06,147 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 11:54:06,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-12-13 11:54:06,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-13 11:54:06,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-12-13 11:54:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:06,781 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 36 [2022-12-13 11:54:07,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:07,080 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 36 [2022-12-13 11:54:07,933 INFO L350 Elim1Store]: Elim1 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 76 treesize of output 44 [2022-12-13 11:54:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:08,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:09,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:09,629 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:54:09,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:09,635 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:54:09,637 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:54:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:09,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999610244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:09,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:09,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 74 [2022-12-13 11:54:09,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068644197] [2022-12-13 11:54:09,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:09,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-13 11:54:09,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:09,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-13 11:54:09,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=5346, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 11:54:19,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 320 [2022-12-13 11:54:19,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 840 places, 3217 transitions, 52773 flow. Second operand has 76 states, 76 states have (on average 123.01315789473684) internal successors, (9349), 76 states have internal predecessors, (9349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:19,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:19,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 320 [2022-12-13 11:54:19,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:17,025 WARN L233 SmtUtils]: Spent 13.72s on a formula simplification. DAG size of input: 120 DAG size of output: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:55:33,660 WARN L233 SmtUtils]: Spent 13.30s on a formula simplification. DAG size of input: 104 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:55:37,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:55:39,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:55:41,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:55:46,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:55:48,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:56:02,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:56:38,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:57:02,780 INFO L130 PetriNetUnfolder]: 43637/82314 cut-off events. [2022-12-13 11:57:02,781 INFO L131 PetriNetUnfolder]: For 440956/440956 co-relation queries the response was YES. [2022-12-13 11:57:03,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405523 conditions, 82314 events. 43637/82314 cut-off events. For 440956/440956 co-relation queries the response was YES. Maximal size of possible extension queue 1197. Compared 721418 event pairs, 8201 based on Foata normal form. 1024/83164 useless extension candidates. Maximal degree in co-relation 405254. Up to 15354 conditions per place. [2022-12-13 11:57:04,111 INFO L137 encePairwiseOnDemand]: 300/320 looper letters, 1943 selfloop transitions, 3145 changer transitions 115/5203 dead transitions. [2022-12-13 11:57:04,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 924 places, 5203 transitions, 86285 flow [2022-12-13 11:57:04,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-12-13 11:57:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2022-12-13 11:57:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 23323 transitions. [2022-12-13 11:57:04,130 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3961107336956522 [2022-12-13 11:57:04,130 INFO L72 ComplementDD]: Start complementDD. Operand 184 states and 23323 transitions. [2022-12-13 11:57:04,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 184 states and 23323 transitions. [2022-12-13 11:57:04,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:04,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 184 states and 23323 transitions. [2022-12-13 11:57:04,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 185 states, 184 states have (on average 126.7554347826087) internal successors, (23323), 184 states have internal predecessors, (23323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:04,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 185 states, 185 states have (on average 320.0) internal successors, (59200), 185 states have internal predecessors, (59200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:04,206 INFO L81 ComplementDD]: Finished complementDD. Result has 185 states, 185 states have (on average 320.0) internal successors, (59200), 185 states have internal predecessors, (59200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:04,206 INFO L175 Difference]: Start difference. First operand has 840 places, 3217 transitions, 52773 flow. Second operand 184 states and 23323 transitions. [2022-12-13 11:57:04,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 924 places, 5203 transitions, 86285 flow [2022-12-13 11:57:13,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 882 places, 5203 transitions, 85089 flow, removed 350 selfloop flow, removed 42 redundant places. [2022-12-13 11:57:13,845 INFO L231 Difference]: Finished difference. Result has 959 places, 4057 transitions, 76701 flow [2022-12-13 11:57:13,846 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=37984, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1923, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=184, PETRI_FLOW=76701, PETRI_PLACES=959, PETRI_TRANSITIONS=4057} [2022-12-13 11:57:13,846 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 925 predicate places. [2022-12-13 11:57:13,847 INFO L495 AbstractCegarLoop]: Abstraction has has 959 places, 4057 transitions, 76701 flow [2022-12-13 11:57:13,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 123.01315789473684) internal successors, (9349), 76 states have internal predecessors, (9349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:13,847 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:13,848 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:13,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:57:14,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 11:57:14,049 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:57:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:14,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1948521016, now seen corresponding path program 3 times [2022-12-13 11:57:14,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:14,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763945336] [2022-12-13 11:57:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:14,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 11:57:14,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:14,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763945336] [2022-12-13 11:57:14,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763945336] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:14,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588710461] [2022-12-13 11:57:14,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:57:14,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:14,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:14,352 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:14,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:57:14,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 11:57:14,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:14,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:57:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 11:57:14,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 11:57:14,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588710461] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:14,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:14,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-12-13 11:57:14,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661436868] [2022-12-13 11:57:14,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:14,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 11:57:14,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:14,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 11:57:14,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2022-12-13 11:57:14,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 320 [2022-12-13 11:57:14,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 959 places, 4057 transitions, 76701 flow. Second operand has 25 states, 25 states have (on average 146.12) internal successors, (3653), 25 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:14,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:14,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 320 [2022-12-13 11:57:14,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:37,298 INFO L130 PetriNetUnfolder]: 54566/102971 cut-off events. [2022-12-13 11:58:37,298 INFO L131 PetriNetUnfolder]: For 675355/675355 co-relation queries the response was YES. [2022-12-13 11:58:39,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571042 conditions, 102971 events. 54566/102971 cut-off events. For 675355/675355 co-relation queries the response was YES. Maximal size of possible extension queue 1295. Compared 921267 event pairs, 16250 based on Foata normal form. 287/103134 useless extension candidates. Maximal degree in co-relation 570317. Up to 18981 conditions per place. [2022-12-13 11:58:39,974 INFO L137 encePairwiseOnDemand]: 311/320 looper letters, 4809 selfloop transitions, 2206 changer transitions 12/7027 dead transitions. [2022-12-13 11:58:39,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 988 places, 7027 transitions, 142933 flow [2022-12-13 11:58:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 11:58:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 11:58:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4580 transitions. [2022-12-13 11:58:39,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47708333333333336 [2022-12-13 11:58:39,979 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4580 transitions. [2022-12-13 11:58:39,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4580 transitions. [2022-12-13 11:58:39,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:39,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4580 transitions. [2022-12-13 11:58:39,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 152.66666666666666) internal successors, (4580), 30 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:39,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 320.0) internal successors, (9920), 31 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:39,987 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 320.0) internal successors, (9920), 31 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:39,987 INFO L175 Difference]: Start difference. First operand has 959 places, 4057 transitions, 76701 flow. Second operand 30 states and 4580 transitions. [2022-12-13 11:58:39,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 988 places, 7027 transitions, 142933 flow [2022-12-13 11:59:08,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 932 places, 7027 transitions, 140157 flow, removed 585 selfloop flow, removed 56 redundant places. [2022-12-13 11:59:08,971 INFO L231 Difference]: Finished difference. Result has 943 places, 4714 transitions, 95966 flow [2022-12-13 11:59:08,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=74277, PETRI_DIFFERENCE_MINUEND_PLACES=903, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2055, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=95966, PETRI_PLACES=943, PETRI_TRANSITIONS=4714} [2022-12-13 11:59:08,974 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 909 predicate places. [2022-12-13 11:59:08,974 INFO L495 AbstractCegarLoop]: Abstraction has has 943 places, 4714 transitions, 95966 flow [2022-12-13 11:59:08,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 146.12) internal successors, (3653), 25 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:08,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:59:08,974 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:59:08,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 11:59:09,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 11:59:09,175 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 11:59:09,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:09,176 INFO L85 PathProgramCache]: Analyzing trace with hash 716473313, now seen corresponding path program 5 times [2022-12-13 11:59:09,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:59:09,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041904490] [2022-12-13 11:59:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:09,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:59:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:59:10,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:59:10,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041904490] [2022-12-13 11:59:10,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041904490] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:59:10,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296128252] [2022-12-13 11:59:10,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:59:10,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:10,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:59:10,992 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:59:10,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_256e7186-1013-415d-93fe-3157fb1d4fcc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:59:11,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 11:59:11,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:59:11,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-13 11:59:11,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:11,177 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 11:59:11,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-12-13 11:59:11,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-13 11:59:11,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:59:11,902 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 38 [2022-12-13 11:59:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:59:12,277 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 38 [2022-12-13 11:59:12,446 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 44 [2022-12-13 11:59:13,600 INFO L350 Elim1Store]: Elim1 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 76 treesize of output 44 [2022-12-13 11:59:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:13,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:14,615 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_992 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_992) |c_~#arr~0.base|) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset| (- 8))) 4294967296) 4294967294))) is different from false [2022-12-13 11:59:31,783 INFO L321 Elim1Store]: treesize reduction 95, result has 47.2 percent of original size [2022-12-13 11:59:31,784 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 60 treesize of output 102 [2022-12-13 11:59:31,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:59:31,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:59:31,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 123 [2022-12-13 11:59:31,815 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 11:59:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 41 refuted. 10 times theorem prover too weak. 1 trivial. 3 not checked. [2022-12-13 11:59:46,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296128252] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:46,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:46,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 29, 28] total 91 [2022-12-13 11:59:46,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670848704] [2022-12-13 11:59:46,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:46,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-12-13 11:59:46,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-12-13 11:59:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=7892, Unknown=47, NotChecked=180, Total=8556 [2022-12-13 11:59:46,707 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 320 [2022-12-13 11:59:46,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 943 places, 4714 transitions, 95966 flow. Second operand has 93 states, 93 states have (on average 105.87096774193549) internal successors, (9846), 93 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:46,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:59:46,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 320 [2022-12-13 11:59:46,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand